Huadai Chemical
PRODUCTS
Vitamin A
Huadai Chemical
|
HS Code |
292099 |
| Chemical Name | Retinol (and related compounds) |
| Solubility | Fat - soluble |
| Function Vision | Essential for maintaining good vision, especially in low - light conditions |
| Epithelial Tissue | Supports the health of epithelial tissues like skin, mucous membranes |
| Immune System | Plays a role in the proper functioning of the immune system |
| Growth Development | Necessary for normal growth and development of cells in the body |
| Antioxidant Properties | Acts as an antioxidant, protecting cells from damage by free radicals |
| Form In Body | Can be stored in the liver in the form of retinyl esters |
| Dietary Sources | Found in animal products like liver, dairy, as well as in some plant - based sources like carrots (as beta - carotene which the body can convert to vitamin A) |
| Deficiency Symptoms | Can lead to night blindness, dry eyes, skin problems, and weakened immune function |
| Packing | Vitamin A packaged in 500 - mg capsules, each bottle containing 60 capsules. |
| Storage | Vitamin A is fat - soluble. It is mainly stored in the liver, where stellate cells play a crucial role. These cells can accumulate significant amounts of retinyl esters, the storage form of vitamin A. Smaller amounts may also be present in adipose tissue. Storage in the liver helps maintain stable levels in the body, releasing it when dietary intake is low. |
| Shipping | Vitamin A, being a chemical, is shipped with strict safety protocols. It's carefully packaged to prevent damage and leakage. Shipment often occurs in climate - controlled containers to maintain its stability during transit. |
For samples, pricing, or more information, please call us at +8615365036030 or mail to info@alchemist-chem.com.
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Tel: +8615365036030
Email: info@alchemist-chem.com
Historical Development
"Vitamin A, the Evolution of History"
The ancestors of ancient times, I don't know what Vitamin A is, but between diet and diet, its origin has been involved. Looking at ancient books, although there is no name for it, the method of dietary therapy is secretly reasonable.
In recent times, science has gradually emerged, and scholars have been studying it unremitting. Westerners first observed this thing in animal livers, and explored that carotene can be converted into vitamin A in plants. Since then, its rationale has become clearer.
Researchers have made great efforts to know that it is important for the purpose and the health of the body. Therefore, the agent of vitamin A is widely used in the world by technology. Either add it to food, or use it as bait, so that everyone can benefit from it. From the beginning of the confusion, today's widespread knowledge, the history of Dimension A, is the chapter of human pursuit of knowledge.
The ancestors of ancient times, I don't know what Vitamin A is, but between diet and diet, its origin has been involved. Looking at ancient books, although there is no name for it, the method of dietary therapy is secretly reasonable.
In recent times, science has gradually emerged, and scholars have been studying it unremitting. Westerners first observed this thing in animal livers, and explored that carotene can be converted into vitamin A in plants. Since then, its rationale has become clearer.
Researchers have made great efforts to know that it is important for the purpose and the health of the body. Therefore, the agent of vitamin A is widely used in the world by technology. Either add it to food, or use it as bait, so that everyone can benefit from it. From the beginning of the confusion, today's widespread knowledge, the history of Dimension A, is the chapter of human pursuit of knowledge.
Product Overview
Vitamin A is an essential nutrient for the human body. It plays a crucial role in the growth and development of the human body, visual maintenance, immune enhancement and many other aspects.
Today, we have developed Vitamin A products, which are selected from high-quality raw materials and refined with advanced technology. The Vitamin A ingredients contained in this product are accurate to standard and have good stability. After taking, it can effectively supplement the Vitamin A required by the human body and help maintain the normal operation of various functions of the body. Whether it is to improve eyesight, enhance immunity, or promote skin health, this product is the best choice. It is easy to take and suitable for different groups of people. We adhere to a scientific and rigorous attitude and strive to present high-quality Vitamin A products to the public, in order to protect everyone's health.
Today, we have developed Vitamin A products, which are selected from high-quality raw materials and refined with advanced technology. The Vitamin A ingredients contained in this product are accurate to standard and have good stability. After taking, it can effectively supplement the Vitamin A required by the human body and help maintain the normal operation of various functions of the body. Whether it is to improve eyesight, enhance immunity, or promote skin health, this product is the best choice. It is easy to take and suitable for different groups of people. We adhere to a scientific and rigorous attitude and strive to present high-quality Vitamin A products to the public, in order to protect everyone's health.
Physical & Chemical Properties
Vitamin A is an important substance needed by the human body. Its physical properties are mostly solid at room temperature, and its color is light yellow. Its taste is specific, and it has a certain solubility. It is soluble in oils and fats. This property helps it play a role in the lipid environment of the human body.
In terms of chemical properties, Vitamin A has a lively double bond structure and is easy to react with many substances. When exposed to light and oxygen, it is easily oxidized, causing its activity to be damaged. This chemical activity makes it play a key role in the biochemical reactions of the human body and participates in many processes such as visual formation and cell differentiation. However, due to its poor chemical stability, when producing and storing Vitamin A products, it is necessary to carefully select conditions to prevent its deterioration to ensure its efficacy.
In terms of chemical properties, Vitamin A has a lively double bond structure and is easy to react with many substances. When exposed to light and oxygen, it is easily oxidized, causing its activity to be damaged. This chemical activity makes it play a key role in the biochemical reactions of the human body and participates in many processes such as visual formation and cell differentiation. However, due to its poor chemical stability, when producing and storing Vitamin A products, it is necessary to carefully select conditions to prevent its deterioration to ensure its efficacy.
Technical Specifications & Labeling
Vitamin A is an essential substance for nourishing the body. The technical specifications and labels (commodity parameters) of its products are related to the quality.
As far as technical specifications are concerned, it is necessary to clarify the purity geometry, and the impurities contained must be minimal to ensure the purity of the effect. The preparation process also needs to be fine. From the selection of raw materials to the extraction and refining, precise methods should be followed, so that high-quality Vitamin A products can be obtained.
In terms of identification (commodity parameters), the content should be detailed, so that everyone can clarify the dosage contained in each dose, so that they can follow the doctor's advice or take it on demand. And the origin, shelf life, etc. are also indispensable. This is the proof of quality and the evidence of user peace of mind. By strictly adhering to technical specifications and labels (product parameters), Vitamin A products can safeguard everyone's health.
As far as technical specifications are concerned, it is necessary to clarify the purity geometry, and the impurities contained must be minimal to ensure the purity of the effect. The preparation process also needs to be fine. From the selection of raw materials to the extraction and refining, precise methods should be followed, so that high-quality Vitamin A products can be obtained.
In terms of identification (commodity parameters), the content should be detailed, so that everyone can clarify the dosage contained in each dose, so that they can follow the doctor's advice or take it on demand. And the origin, shelf life, etc. are also indispensable. This is the proof of quality and the evidence of user peace of mind. By strictly adhering to technical specifications and labels (product parameters), Vitamin A products can safeguard everyone's health.
Preparation Method
Vitamin A is the first raw material. Its source or source is collected from animals and plants, which are as rich as fish liver and rich in vitamin A essence. In plants, carrots, etc., contain carotene, which can be transformed into vitamin A in the body.
As for the production process, the extraction method is very important. With a suitable solvent, extract the vitamin A components in the raw materials, and then separate and purify them to make vitamin A pure. The reaction steps also need to be carried out carefully. According to chemical principles, temperature control and pressure regulation are used to make the reaction smooth.
The catalytic mechanism is also key. The catalyst is selected to accelerate the reaction process and increase the rate of output. In this way, vitamin A products can be produced in high quality and mass production, which is healthy for the public and provides sufficient vitamin A nutrients.
As for the production process, the extraction method is very important. With a suitable solvent, extract the vitamin A components in the raw materials, and then separate and purify them to make vitamin A pure. The reaction steps also need to be carried out carefully. According to chemical principles, temperature control and pressure regulation are used to make the reaction smooth.
The catalytic mechanism is also key. The catalyst is selected to accelerate the reaction process and increase the rate of output. In this way, vitamin A products can be produced in high quality and mass production, which is healthy for the public and provides sufficient vitamin A nutrients.
Chemical Reactions & Modifications
Vitamin A is the most important of things. In the reaction and denaturation of transformation, the reason is profound. Those who have studied it in the past, explore the secret of its transformation.
Observe its transformation response, light or heat, often change. If exposed to light, the structure of its molecules is easily changed, which changes its nature greatly. And it also responds to other encounters. Or with oxygenation, causing its effect to decrease.
As for denaturation, through the tune of chemical technology, a new quality can be obtained, and its nature is also different. Or increase its stability, or change its dissolution, which is beneficial for use. If it is treated with an agent, it can change its state, suitable for all needs.
Transformers study the transformation and transformation of Vitamin A, hoping to obtain good methods, maintain its quality, expand its use, and benefit people's lives.
Observe its transformation response, light or heat, often change. If exposed to light, the structure of its molecules is easily changed, which changes its nature greatly. And it also responds to other encounters. Or with oxygenation, causing its effect to decrease.
As for denaturation, through the tune of chemical technology, a new quality can be obtained, and its nature is also different. Or increase its stability, or change its dissolution, which is beneficial for use. If it is treated with an agent, it can change its state, suitable for all needs.
Transformers study the transformation and transformation of Vitamin A, hoping to obtain good methods, maintain its quality, expand its use, and benefit people's lives.
Synonyms & Product Names
Vitamin A has many names. Ancient cloud "retinol", now also known as "anti-dry eye vitamin". Vitamin A products in the city have various names. There are those called "Vitamin A soft capsules", which are well-known to the public and are often used as a choice for health care to supplement the lack of vitamin A in the human body. There are also "Vitamin A drop pills", although the shape is different, the effect is similar.
Vitamin A is in the body, which is of great service. It can protect the eyes, make the eyes clear and the things clear. Help the skin to be healthy, make the skin lustrous and less sick. It is all kinds of Vitamin A products, all of which seek to achieve this effect and help people to be healthy. Although the names are different, they are all belonging to Vitamin A, for people's health and treatment of diseases.
Vitamin A is in the body, which is of great service. It can protect the eyes, make the eyes clear and the things clear. Help the skin to be healthy, make the skin lustrous and less sick. It is all kinds of Vitamin A products, all of which seek to achieve this effect and help people to be healthy. Although the names are different, they are all belonging to Vitamin A, for people's health and treatment of diseases.
Safety & Operational Standards
The use of vitamin A products
The use of vitamin A products
is critical to human health and is related to vision, skin moisturization and immunity. However, the safety and operation specifications of vitamin A products must also be detailed, so that the user can be safe.
Preparation of vitamin A products, the selection of raw materials must be carefully reviewed. When the product is pure and unstained, it complies with the regulations of the Pharmacopoeia. The method of its preparation must follow the scientific process, accurately control the temperature, time and various conditions to prevent the inactivation of vitamin A.
When storing, it should be in a cool, dry and dark place. Vitamin A is sensitive, and light, heat and humidity can cause it to deteriorate. Therefore, it should be stored in an airtight device to strictly prevent the intrusion of air and water vapor.
Use vitamin A products, and the amount should be controlled to the fullest. Too little will make it difficult to achieve the effect, and too much will counteract the poison. The amount of daily use for adults varies depending on the physique and age. Be sure to follow the doctor's advice and do not increase it excessively.
When applying, it is also advisable to avoid it. For those who take it internally, it is better to eat it after eating to help it absorb; for external use, first clean the affected area, apply a thin coating and rub it lightly to promote its skin penetration.
And vitamin A products should be used with other medicines or food, or they should be used together with each other. Before taking medicine, you must inform the doctor of all the substances used to avoid accidents.
In short, although vitamin A products are beneficial to the body, safety and operation norms should not be ignored. Only by following the rules can we achieve their effectiveness and avoid their harm, and protect ourselves from Kangtai.
The use of vitamin A products
is critical to human health and is related to vision, skin moisturization and immunity. However, the safety and operation specifications of vitamin A products must also be detailed, so that the user can be safe.
Preparation of vitamin A products, the selection of raw materials must be carefully reviewed. When the product is pure and unstained, it complies with the regulations of the Pharmacopoeia. The method of its preparation must follow the scientific process, accurately control the temperature, time and various conditions to prevent the inactivation of vitamin A.
When storing, it should be in a cool, dry and dark place. Vitamin A is sensitive, and light, heat and humidity can cause it to deteriorate. Therefore, it should be stored in an airtight device to strictly prevent the intrusion of air and water vapor.
Use vitamin A products, and the amount should be controlled to the fullest. Too little will make it difficult to achieve the effect, and too much will counteract the poison. The amount of daily use for adults varies depending on the physique and age. Be sure to follow the doctor's advice and do not increase it excessively.
When applying, it is also advisable to avoid it. For those who take it internally, it is better to eat it after eating to help it absorb; for external use, first clean the affected area, apply a thin coating and rub it lightly to promote its skin penetration.
And vitamin A products should be used with other medicines or food, or they should be used together with each other. Before taking medicine, you must inform the doctor of all the substances used to avoid accidents.
In short, although vitamin A products are beneficial to the body, safety and operation norms should not be ignored. Only by following the rules can we achieve their effectiveness and avoid their harm, and protect ourselves from Kangtai.
Application Area
Vitamin A is essential for the health of the human body. Its application field is wide and essential.
In the vision of the eyes, Vitamin A is indispensable. People are in a dark room, and the vision is clear. If it is lacking, the eyes are full of diseases, and if it is light, it can cause blindness, and if it is heavy, it can cause blindness.
In the skin maintenance end, it is also indispensable. It can make the skin delicate and smooth, prevent it from being rough and cracked, and rejuvenate.
In addition, it helps the human body's immunity. It can strengthen the body's power to resist external evil and reduce disease.
From this perspective, Vitamin A is used in the fields of eyes, skin and immunity, for the protection of health, and it should be used carefully to protect the body and health.
In the vision of the eyes, Vitamin A is indispensable. People are in a dark room, and the vision is clear. If it is lacking, the eyes are full of diseases, and if it is light, it can cause blindness, and if it is heavy, it can cause blindness.
In the skin maintenance end, it is also indispensable. It can make the skin delicate and smooth, prevent it from being rough and cracked, and rejuvenate.
In addition, it helps the human body's immunity. It can strengthen the body's power to resist external evil and reduce disease.
From this perspective, Vitamin A is used in the fields of eyes, skin and immunity, for the protection of health, and it should be used carefully to protect the body and health.
Research & Development
Taste the wonders of medicine, it is related to people's livelihood. Today there is a thing called Vitamin A, which is of great benefit to human health. We practitioners often study this thing, hoping to make some progress.
In the past, the world knew little about Vitamin A. After years of study, it has gradually become clear. It can help the eyes, make the light clear and clear; it is also related to moisturizing the skin, promoting its smoothness and delicacy.
As an excellent agent for making this thing, we use it day and night. Observe the method of its extraction, strive for precision; observe the beauty of its formula, and consider it repeatedly. Expect to use the best product to benefit everyone. May we be able to bring forth new ideas in the future, so that this industry can flourish and prosper, and do our best for the health of all beings.
In the past, the world knew little about Vitamin A. After years of study, it has gradually become clear. It can help the eyes, make the light clear and clear; it is also related to moisturizing the skin, promoting its smoothness and delicacy.
As an excellent agent for making this thing, we use it day and night. Observe the method of its extraction, strive for precision; observe the beauty of its formula, and consider it repeatedly. Expect to use the best product to benefit everyone. May we be able to bring forth new ideas in the future, so that this industry can flourish and prosper, and do our best for the health of all beings.
Toxicity Research
Since modern times, there have been many people who have studied chemical substances. It is particularly important to study the toxicity of Vitamin A products.
Vitamin A, which is indispensable to the human body, can help vision and benefit the skin. However, everything is in moderation, and excessive Vitamin A products are also at risk of toxicity.
There are researchers who have tried various animals to observe their appearance after eating different amounts of Vitamin A products. See that when used in large doses, animals or their bodies are uncomfortable, their hair is withered, and even their organs are damaged. Looking at people, if you take Vitamin A products too much for a long time, you will also have headaches, dizziness, nausea, bone pain and other symptoms.
Therefore, the toxicity of Vitamin A products must be studied in detail. Its use, when its advantages and disadvantages, the amount of control, is the key, so as to make good use of it.
Vitamin A, which is indispensable to the human body, can help vision and benefit the skin. However, everything is in moderation, and excessive Vitamin A products are also at risk of toxicity.
There are researchers who have tried various animals to observe their appearance after eating different amounts of Vitamin A products. See that when used in large doses, animals or their bodies are uncomfortable, their hair is withered, and even their organs are damaged. Looking at people, if you take Vitamin A products too much for a long time, you will also have headaches, dizziness, nausea, bone pain and other symptoms.
Therefore, the toxicity of Vitamin A products must be studied in detail. Its use, when its advantages and disadvantages, the amount of control, is the key, so as to make good use of it.
Future Prospects
Taste and hear all the things in the world, all have wonderful potential, and the things of vitamin A also have untapped great paths. Today, my generation's research is expected to be in the future, and it can show its extraordinary power.
Vitamin A is a great effect on the human body, which is related to vision, skin health, and immunity. However, the methods used at the moment may not be good, so that they cannot be fully used.
Looking to the future, we hope to use exquisite techniques to explore its new quality, so that it can be a good medicine for all diseases and a good prescription for fitness. The road of research and development is full of thorns, but our researchers should be like Jingwei reclaiming the sea and praising the father day by day, and we will never hesitate. It is hoped that one day, vitamin A will be able to shine in the fields of medicine and health care, paving the way for the well-being of all people. This is the unfulfilled dream of our generation.
Vitamin A is a great effect on the human body, which is related to vision, skin health, and immunity. However, the methods used at the moment may not be good, so that they cannot be fully used.
Looking to the future, we hope to use exquisite techniques to explore its new quality, so that it can be a good medicine for all diseases and a good prescription for fitness. The road of research and development is full of thorns, but our researchers should be like Jingwei reclaiming the sea and praising the father day by day, and we will never hesitate. It is hoped that one day, vitamin A will be able to shine in the fields of medicine and health care, paving the way for the well-being of all people. This is the unfulfilled dream of our generation.
What are the main food sources of vitamin A?
The essential food sources for sustaining life are various. Looking at the food in the diet, you can get its nourishment.
First of all, the liver of poultry, such as sheep liver and pig liver, is the abundant source of sustaining life. Sheep liver is purple-brown in color and flexible in texture. It contains a lot of sustaining life, and the amount contained in each hundred grams is quite considerable. It can replenish people's liver deficiency and benefit the eyes. The same is true for pig liver, which is the best choice for sustaining life in daily food.
Furthermore, dairy and its products should not be ignored. Milk is mellow and rich in nutrients. Although the life-sustaining element A is not as abundant as the liver, drinking it every day can also add up to a lot and nourish the body. Cheese, milk skin, etc., are all derived from this, and also contain life-sustaining element A, which can be used as a nourishing aid.
There are also eggs, eggs, duck eggs, etc. The yolk contains life-sustaining element A. Egg yolk is golden, round and full, not only has a mellow taste, but also has this important nutrient, which is indispensable in the diet.
Among vegetables and plants, carrots are the best. Its color is orange-yellow, crisp and sweet, and contains a lot of carotene. This substance can be turned into life-sustaining element A in the human body, and its effect is excellent. Spinach is also good, the leaves are emerald green, rich in a variety of nutrients, and the life-sustaining element A is also among them. Eating it often can nourish the body and keep fit.
Fruits such as mangoes and loquats all contain the life-sustaining element A. Mangoes are yellow as gold in color, with a rich aroma and a sweet taste. They are both full of food and benefit from the life-sustaining element A. Loquats are yellow and white in color, and the meat is tender and juicy. Eating can also provide the life-sustaining element A for the human body.
All kinds of food sources, or for animal organs, or for milk eggs, or for vegetables and fruits, people should make good choices and eat a reasonable diet to ensure the adequacy of the life-sustaining element A, nourish the body and keep fit.
First of all, the liver of poultry, such as sheep liver and pig liver, is the abundant source of sustaining life. Sheep liver is purple-brown in color and flexible in texture. It contains a lot of sustaining life, and the amount contained in each hundred grams is quite considerable. It can replenish people's liver deficiency and benefit the eyes. The same is true for pig liver, which is the best choice for sustaining life in daily food.
Furthermore, dairy and its products should not be ignored. Milk is mellow and rich in nutrients. Although the life-sustaining element A is not as abundant as the liver, drinking it every day can also add up to a lot and nourish the body. Cheese, milk skin, etc., are all derived from this, and also contain life-sustaining element A, which can be used as a nourishing aid.
There are also eggs, eggs, duck eggs, etc. The yolk contains life-sustaining element A. Egg yolk is golden, round and full, not only has a mellow taste, but also has this important nutrient, which is indispensable in the diet.
Among vegetables and plants, carrots are the best. Its color is orange-yellow, crisp and sweet, and contains a lot of carotene. This substance can be turned into life-sustaining element A in the human body, and its effect is excellent. Spinach is also good, the leaves are emerald green, rich in a variety of nutrients, and the life-sustaining element A is also among them. Eating it often can nourish the body and keep fit.
Fruits such as mangoes and loquats all contain the life-sustaining element A. Mangoes are yellow as gold in color, with a rich aroma and a sweet taste. They are both full of food and benefit from the life-sustaining element A. Loquats are yellow and white in color, and the meat is tender and juicy. Eating can also provide the life-sustaining element A for the human body.
All kinds of food sources, or for animal organs, or for milk eggs, or for vegetables and fruits, people should make good choices and eat a reasonable diet to ensure the adequacy of the life-sustaining element A, nourish the body and keep fit.
What are the important roles of vitamin A in the human body?
It is necessary to have a lot of food. "Vegetables · Six Tibetan Elephants" said: "The celestial eater has five flavors, and the earth has five flavors." The one who has food for A is the same as the taste of the place where people are.
It is very effective in the eyes. The reason why the human eye can distinguish light and dark, and distinguish things, is very powerful. This antibiotic can help the eye's membrane cells to synthesize purple, which is very important in the dark light environment. If people are deficient in vitamin A, the synthesis of purple, causing night blindness, every time at dusk, the eyes cannot see clearly, and the road is like blindness, which is dangerous.
And the health of the epithelium, also vitamin A. The epithelium of the skin, respiratory tract, digestive tract, etc., if you get the nourishment of vitamin A, it can maintain its integrity and normal function. If the epithelium lacks vitamin A, it is easy to dry and angle, the skin is rough, and the respiratory tract and digestive tract are resistant to damage, and it is easy to be invaded by external evil, causing general diseases.
In addition, it is also indispensable for the birth and development of human beings. Especially in children, it can promote the normal production of bones and teeth. The production of bones requires osteogenesis and bone breaking. Vitamin A can perform both functions and make the bones orderly. If a child lacks Vitamin A, the bones will be reared, the stature will be short, and the eruption of teeth will also be affected.
Vitamin A also has the effect of boosting the immune system. It can help the production and activity of immune cells, increase the ability of human beings to resist pathogens, and make positive things exist, and evil cannot be dried. Therefore, Vitamin A is used in people, such as the city of the city, the shield of the country, the health of life, and the work of the body cannot be ignored.
It is very effective in the eyes. The reason why the human eye can distinguish light and dark, and distinguish things, is very powerful. This antibiotic can help the eye's membrane cells to synthesize purple, which is very important in the dark light environment. If people are deficient in vitamin A, the synthesis of purple, causing night blindness, every time at dusk, the eyes cannot see clearly, and the road is like blindness, which is dangerous.
And the health of the epithelium, also vitamin A. The epithelium of the skin, respiratory tract, digestive tract, etc., if you get the nourishment of vitamin A, it can maintain its integrity and normal function. If the epithelium lacks vitamin A, it is easy to dry and angle, the skin is rough, and the respiratory tract and digestive tract are resistant to damage, and it is easy to be invaded by external evil, causing general diseases.
In addition, it is also indispensable for the birth and development of human beings. Especially in children, it can promote the normal production of bones and teeth. The production of bones requires osteogenesis and bone breaking. Vitamin A can perform both functions and make the bones orderly. If a child lacks Vitamin A, the bones will be reared, the stature will be short, and the eruption of teeth will also be affected.
Vitamin A also has the effect of boosting the immune system. It can help the production and activity of immune cells, increase the ability of human beings to resist pathogens, and make positive things exist, and evil cannot be dried. Therefore, Vitamin A is used in people, such as the city of the city, the shield of the country, the health of life, and the work of the body cannot be ignored.
How to Determine if Your Body is Lack of Vitamin A
If you want to determine whether the human body is deficient in vitamin A, you can detect it from the following signs.
To observe the symptoms of various eyes, this is the main way. Gaimu relies on vitamin A to maintain its function. If you gradually feel dizzy, it is especially difficult to see in the dark, or even cause night blindness, which may be a sign of vitamin A. And dry eyes, itchy at times, prone to blindness, redness in the eyelids, or signs. Or see the conjunctiva wrinkled, corneal luster gradually lost, all need to pay attention.
Furthermore, observe the state of the skin. When vitamin A is deficient, the skin often appears dry, like the roughness of fish scales, and even dander, with extended limbs, shoulders, and back. Children's skin or follicular papules, like thorns, are difficult to touch.
And the appearance of the respiratory tract and digestive tract can also be used as evidence. Lack of vitamin A, the respiratory mucosa loses its nourishment, and it is not solid outside the defense. It is easy to be invaded by external evils, causing frequent diseases such as colds and tracheitis. In the digestive tract, there may be loss of appetite, bloating and discomfort, all of which are caused by changes in the mucosa.
Hair also responds. Hair is gradually losing its luster, withered and easy to fold, and easy to fall off, which may also be related to the lack of vitamin A.
However, these signs are only the first judgment. To determine whether the human body is deficient in vitamin A, doctors need to use professional methods, such as measuring serum vitamin A content, etc., to make an accurate judgment. Do not make a sudden judgment based on only one or two appearances to avoid misjudgment.
To observe the symptoms of various eyes, this is the main way. Gaimu relies on vitamin A to maintain its function. If you gradually feel dizzy, it is especially difficult to see in the dark, or even cause night blindness, which may be a sign of vitamin A. And dry eyes, itchy at times, prone to blindness, redness in the eyelids, or signs. Or see the conjunctiva wrinkled, corneal luster gradually lost, all need to pay attention.
Furthermore, observe the state of the skin. When vitamin A is deficient, the skin often appears dry, like the roughness of fish scales, and even dander, with extended limbs, shoulders, and back. Children's skin or follicular papules, like thorns, are difficult to touch.
And the appearance of the respiratory tract and digestive tract can also be used as evidence. Lack of vitamin A, the respiratory mucosa loses its nourishment, and it is not solid outside the defense. It is easy to be invaded by external evils, causing frequent diseases such as colds and tracheitis. In the digestive tract, there may be loss of appetite, bloating and discomfort, all of which are caused by changes in the mucosa.
Hair also responds. Hair is gradually losing its luster, withered and easy to fold, and easy to fall off, which may also be related to the lack of vitamin A.
However, these signs are only the first judgment. To determine whether the human body is deficient in vitamin A, doctors need to use professional methods, such as measuring serum vitamin A content, etc., to make an accurate judgment. Do not make a sudden judgment based on only one or two appearances to avoid misjudgment.
What are the dangers of excessive vitamin A intake?
Excessive intake of vitamin A is extremely harmful. Although "Tiangong Kaiwu" does not directly mention the harm of excessive vitamin A, it can be deduced from the ancient principles of health preservation and medicine.
Gu Yun: "If there is no good or evil, if it is too bad, it will be a disaster." Although vitamin A is very important to the human body, if it is ingested in excess, the viscera will be difficult to bear its weight. In the eyes, at first, the vision may be unclear and the eyes may be blurred. Because of the imbalance of yin and yang in the body, the excretion of the liver is abnormal, and the liver is opened to the eyes, so the eyes are affected by it.
It also involves the skin. The skin depends on qi, blood and body fluids to nourish it. Excessive vitamin A, qi and blood run surly, the skin is disnourished, or there are sores and itching, and the skin color is also dull and dull. For example, in ancient books, patients with various skin diseases are caused by the imbalance of yin and yang in the body. Excessive vitamin A causes qi and blood disorders, and the same is true.
In addition, it also has serious harm to bone development. Normal development requires the coordination of various elements. Excessive vitamin A breaks the balance, and bone growth is disordered, or it can cause bone pain and developmental deformities. Children are particularly sensitive. Because of their delicate organs and vigorous vitality, excessive intake can easily damage their normal growth. For example, seedlings are destroyed by excessive wind and rain and cannot become pillars.
And it has a great impact on the function of the viscera. The spleen and stomach are the main transportation and transformation. Excessive vitamin A causes the spleen and stomach to transport and transform and lose their functions, or nausea, vomiting, abdominal distension, diarrhea and other diseases. The kidney is the main collector of essence, and it is also disturbed by it, and the essence is damaged, which is unfavorable to human growth and reproduction. Therefore, the way of health is in moderation, and the same is true for vitamin A intake. You must not be greedy for too much, which will lead to all kinds of disasters.
Gu Yun: "If there is no good or evil, if it is too bad, it will be a disaster." Although vitamin A is very important to the human body, if it is ingested in excess, the viscera will be difficult to bear its weight. In the eyes, at first, the vision may be unclear and the eyes may be blurred. Because of the imbalance of yin and yang in the body, the excretion of the liver is abnormal, and the liver is opened to the eyes, so the eyes are affected by it.
It also involves the skin. The skin depends on qi, blood and body fluids to nourish it. Excessive vitamin A, qi and blood run surly, the skin is disnourished, or there are sores and itching, and the skin color is also dull and dull. For example, in ancient books, patients with various skin diseases are caused by the imbalance of yin and yang in the body. Excessive vitamin A causes qi and blood disorders, and the same is true.
In addition, it also has serious harm to bone development. Normal development requires the coordination of various elements. Excessive vitamin A breaks the balance, and bone growth is disordered, or it can cause bone pain and developmental deformities. Children are particularly sensitive. Because of their delicate organs and vigorous vitality, excessive intake can easily damage their normal growth. For example, seedlings are destroyed by excessive wind and rain and cannot become pillars.
And it has a great impact on the function of the viscera. The spleen and stomach are the main transportation and transformation. Excessive vitamin A causes the spleen and stomach to transport and transform and lose their functions, or nausea, vomiting, abdominal distension, diarrhea and other diseases. The kidney is the main collector of essence, and it is also disturbed by it, and the essence is damaged, which is unfavorable to human growth and reproduction. Therefore, the way of health is in moderation, and the same is true for vitamin A intake. You must not be greedy for too much, which will lead to all kinds of disasters.
What is the requirement for vitamin A in different age groups?
The demand for vitamin A varies from year to year, and the situation is as follows:
In the infancy stage, in the rapid growth stage, the demand for vitamin A is low. From 0 to 6 months, the daily intake is 300 micrograms of active alcohol (RAE). In this period, the main food is breast milk or formula milk, and the content of vitamin A in breast milk is usually sufficient to meet the demand; formula milk is also added according to the phase. From 6 to 12 months, the daily requirement is increased to 400 micrograms of RAE. In addition to milk, you can add vitamin A-rich foods, such as Hu mud, pumpkin puree, etc.
Children's growth period, the growth rate depends on the speed. 1 to 3% of children need 310 micrograms of RAE per day for vitamin A; 4 to 6% of children, the daily requirement is increased to 400 micrograms of RAE. First-year children are richer in food, and can eat more foods rich in vitamin A, such as liver, milk, eggs, and dark, orange vegetables and fruits.
During adolescence, the body is rapidly reared and the generation is strong. Children from 7 to 10% need 500 micrograms of RAE per day for vitamin A; boys from 11 to 13% need 550 micrograms of RAE per day, and girls need 500 micrograms of RAE; boys from 14 to 17% need 600 micrograms of RAE per day, and girls need 550 micrograms of RAE per day. Adolescents should maintain a balanced diet to meet their needs for vitamin A and other nutrients.
Adults have different levels of vitamin A, and their physiological functions are different, but their needs are slightly different. Adult men receive 600 micrograms of RAE per day, and adult women receive 500 micrograms of RAE. Pregnant and breastfeeding women have special needs. Women in the second trimester need 770 micrograms of RAE per day, which increases to 800 micrograms in the third trimester; breastfeeding women need 1200 micrograms of RAE per day to protect their own and fetal health.
Therefore, people in different age groups have different requirements for vitamin A due to different physiological characteristics and nutritional needs. In daily life, people need to eat a reasonable diet according to their own age and physiological conditions to ensure sufficient vitamin A intake and good health.
In the infancy stage, in the rapid growth stage, the demand for vitamin A is low. From 0 to 6 months, the daily intake is 300 micrograms of active alcohol (RAE). In this period, the main food is breast milk or formula milk, and the content of vitamin A in breast milk is usually sufficient to meet the demand; formula milk is also added according to the phase. From 6 to 12 months, the daily requirement is increased to 400 micrograms of RAE. In addition to milk, you can add vitamin A-rich foods, such as Hu mud, pumpkin puree, etc.
Children's growth period, the growth rate depends on the speed. 1 to 3% of children need 310 micrograms of RAE per day for vitamin A; 4 to 6% of children, the daily requirement is increased to 400 micrograms of RAE. First-year children are richer in food, and can eat more foods rich in vitamin A, such as liver, milk, eggs, and dark, orange vegetables and fruits.
During adolescence, the body is rapidly reared and the generation is strong. Children from 7 to 10% need 500 micrograms of RAE per day for vitamin A; boys from 11 to 13% need 550 micrograms of RAE per day, and girls need 500 micrograms of RAE; boys from 14 to 17% need 600 micrograms of RAE per day, and girls need 550 micrograms of RAE per day. Adolescents should maintain a balanced diet to meet their needs for vitamin A and other nutrients.
Adults have different levels of vitamin A, and their physiological functions are different, but their needs are slightly different. Adult men receive 600 micrograms of RAE per day, and adult women receive 500 micrograms of RAE. Pregnant and breastfeeding women have special needs. Women in the second trimester need 770 micrograms of RAE per day, which increases to 800 micrograms in the third trimester; breastfeeding women need 1200 micrograms of RAE per day to protect their own and fetal health.
Therefore, people in different age groups have different requirements for vitamin A due to different physiological characteristics and nutritional needs. In daily life, people need to eat a reasonable diet according to their own age and physiological conditions to ensure sufficient vitamin A intake and good health.
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