Vitamin - Wikipedia, the free encyclopedia
A vitamin is an organic compound required as a nutrient in tiny amounts by an organism. [1] The term 'vitamin' first became popular in the early 1800's as a contraction of the ...
Vitamin A - Wikipedia, the free encyclopedia
Vitamin A is linked to a family of similarly shaped molecules, the retinoids, which complete the remainder of the vitamin sequence. Its important part is the retinyl group, which ...
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vitamin definition of vitamin in the Free Online Encyclopedia.
vitamin, group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction.
Vitamin A Info - Benefits, Sources, Deficiency, Overdose
Find Vitamin A information on this page. Find out how much Vitamin A you need, problems caused by a deficiency (getting too little) or an overdose (getting too much), what foods ...
Vitamin Chart
Your body needs vitamins to work properly. They boost the immune system, are essential for normal growth and development, and help cells and organs do their jobs.
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Vitamin A - retinol, beta-carotene, sources, benefits, dosage ...
Vitamin A (retinol, beta-carotene) factsheet with information on vitamin A sources, uses, health benefits, dosage, RDA, deficiency symptoms, overdose and toxicity.
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