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Tag Archives: vitamin d

How Vitamin D and Calcium Rebuild Your Bone

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It is never too early to begin supplementing calcium and vitamin D for building bone mass. Osteoporosis is a common problem among the elderly, but is totally preventable and treatable. Women especially are at risk, because they can lose up to 5% of their bone mass every year for up to seven years after menopause. With crippling fractures and death from complications of fractures on the rise, we need to be sure that we are letting people know how vitamins and supplements can help them prevent and treat osteoporosis.

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The ABCs of Vitamins – A Comprehensive Vitamin Guide

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Vitamins are organic compounds that are essential for normal metabolic functions. These functions include using proteins to repair injured tissue and converting fats and carbohydrates into energy. They do not supply the body with either energy or calories directly. Because vitamins (with the exception of Vitamin D) can not be synthesized by our body, they must be consumed through diet to prevent vitamin deficiency disorders.

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Fat soluble vitamins

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Vitamin A Vitamin A is a group of unsaturated nutritional organic compounds, that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids, among which beta-carotene is the most important. Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system and good vision. Vitamin A is needed by the retina of the eye in the form of retinal, which combines with protein opsin to form rhodopsin, the light-absorbing molecule necessary for both low-light (scotopic vision) and color vision. Vitamin A also functions in a very different role as retinoic acid (an irreversibly oxidized form of retinol), which is an important hormone-like growth factor for epithelial and other cells. In foods of animal origin, the major form of vitamin A is an ester, primarily retinyl palmitate, which is converted to retinol (chemically an alcohol) in the small intestine. The retinol form functions as a storage form of the vitamin, and can be converted to and from its visually active aldehyde form, retinal. Retinol, the form of vitamin A absorbed when eating animal food sources, is a yellow, fat-soluble substance. Since the pure alcohol form is unstable, the vitamin is found in tissues ...

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