all you need to know about vitamin A

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This website provides information about vitamin A (retinol) and its use in the human body; why vitamin A is necessary for health, what happens if you have too much or overdose or have too little and develop a vitamin A deficiency. The site provides details of nutrition, the recommended daily allowance for each vitamin (RDA) and how to source vitamin A to ensure a healthy balanced diet. Guidance is given on the vitamin content of specific foods and vitamin supplements are available to buy.