Vitamin
Vitamins are complex organic compounds that occur naturally in plants and animals. People and other animals need these compounds in order to maintain life functions and prevent diseases. About 15 different vitamins are necessary for the nutritional needs of humans. Only minute amounts are required to achieve their purpose, yet without them life cannot be maintained. Some vitamins, including vitamins A, D, E, and K, are fat soluble and are found in the fatty parts of food and body tissue. As such they can be stored in the body. Others,...
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