Vitamin A

Vitamin A

All About Vitamin A
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. However,​ 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,​ 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.

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