Vitamins are essential for good health and well-being. And is defined as any combination of materials required in small quantities for healthy growth and development. Can not be manufactured in the body, they are essential components therefore power.
There are two types of vitamins are also soluble in water or fat. Vitamin A (retinol) is soluble vitamin fat, which is not excreted from the body in urine even overuse can have a negative effect on health. Found vitamin A in foods of animal origin, for example. Liver, milk and egg yolks. There formed in the body from beta-carotene pigment that is found in some vegetables, such as. Carrots, cabbage and lettuce.
Vitamin A has a number of roles in the body. It is essential for normal cell division and growth. It is important to keep the mucous membranes for in the digestive system, urinary tract and repiratory. Retinol is a pale yellow solid which easily soluble in oil and fat and it is necessary for good vision, including vision in the dark as well as having an important role in the natural growth of the fetus. Can be produced industrially and thus to enrich the use of margarine.
The best source on the retina is the liver and 3G small amount to meet the daily needs of the body. 700mcg daily enough for an adult, which can also be derived from the carotene in foods, such as beta. 2 ounces raw islands.
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