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Essential Principles Of Vitamin A
By Carlo Morelli
Vitamin A was given the first letter of the alphabet for a name because it was the first vitamin to be discovered. It was found that vitamin A has a large number of uses in the body including keeping eyes healthy, aiding cell growth and also helping boost the immune system. Nevertheless, vitamin A is not only absorbed directly but it is also created by the body by converting beta carotene into vitamin A.
Vitamin A itself is found in a number of foods such as eggs, milk, ...
{PS vitamin - A vitamin is an organic compound required as a nutrient in tiny amounts by an organism. A compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. Thus, the term is conditional both on the circumstances and the particular organism. For example, ascorbic acid functions as vitamin C for some animals but not others, and vitamins D and K are required in the human diet only in certain circumstances. Vitamins are defined by their biological activity, not their structure. Thus, each "vitamin" actually refers to a number of vitamer compounds, which form a set of distinct chemical compounds that show the biological activity of a particular vitamin. Such a set of chemicals are grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A," which (for example) includes retinal, retinol, and many carotenoids. Vitamers are often inter-convertible in the body. The term vitamin does not include other essential nutrients such as dietary minerals, essential fatty acids, or essential amino acids, nor does it encompass the large number of other nutrients that promote health but are otherwise required less often.
}
... liver and meat. Beta carotene that the body can convert into vitamin A is found in many fruits and vegetables, especially the red, orange and green coloured ones. The most important point to remember that consuming too much pure vitamin A can be toxic. It is essential not to exceed the recommended daily allowance for vitamin A.
The actual recommended allowance of vitamin A varies depending on a person’s age, sex and other factors. While the actual amount of vitamin A consumed may be toxic if the recommended daily allowance is exceeded, there is a far higher limit to how much beta carotene can be consumed. Therefore it is advisable to concentrate on obtaining the greatest amount of beta carotene which the body can then convert to vitamin A, rather than consuming vast quantities of pure vitamin A rich foods.
Many people will remember being told that eating lots of carrots helps you to see in the dark and that is down to the vitamin A that is produced from the high levels of beta carotene that are found in the vegetables. Other foods which have high levels of beta carotene that can be converted to vitamin A include tomatoes and dark green leafy vegetables, such as spinach. Beta carotene is not only used to form vitamin A, but it is also a powerful antioxidant in itself.
None of the beta carotene that is absorbed is wasted as any excess after conversion to vitamin A has taken place is used to fight the harmful free radicals within the body. Vitamin A also helps fight infections and illnesses by helping tissues that line various parts of the body, including the eyes, mouth, nose, throat and lungs, to grow and also to repair them if they are damaged to prevent infection. Children also need plenty of vitamin A to help their bones and teeth to develop properly.
Beauty Vitamin In Your Horse Supplies
By J. Atilia
What does your girlfriend have in common with your horse? I'm not being rude or making dirty jokes. They have other things in common aside form what you had in mind. I'm talking about vitamin E, that Read more...
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Why Is Nutrition Education Not Working？
By Mitamins Team
Too many choices You’d think that with all the educational programs, government advice and medical informational material telling people to eat better and take proactive care of their Read more...
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Roles Played By Nutritional Factors In The Management Of Multiple Sclerosis
By Groshan Fabiola
Although no diet can compete with existing medication treatments for multiple sclerosis in terms of curative effects, a special regime can help alleviate existing symptoms by controlling a series of Read more...
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Glyconutrients
By Glomy Mart
More and more research continues to flood the internetregarding glyconutrients. These so called 'miracle sugars' have beenhailed as the next cancer cure. Is this all hype or is there any Read more...
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