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Jarrow Formulas Vitamin D3 cholecalciferol is from purified fish liver oil and is free of Vitamin A. Fat soluable Vitamin D3 is converted by the kidneys into the hormone calcitriol, the activated form of Vitamin D3 which affects a variety of target tissues including bone, intestine, muscle, brain, skin and immune system cells. Calcitriol enhances calcium and phosphorus absorption and stimulates the synthesis of osteocalcin, an important structural protein in bone. Also, calcitriol is involved in proper cell differentitaion changing cell function.

:: Vitamins & Minerals 3448

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