[Intestinal calcium absorption and vitamin D].

Clin Calcium

Department of Biochemistry, School of Dentistry, Showa University.

Published: July 2003

Vitamin D is required for efficient absorption of dietary Ca. Accumulated observations indicated that active form of vitamin D is involved in the three steps of intestinal Ca absorption:incorporation of Ca by epithelial cells through brush border membrane, intracellular Ca movement, and excretion of Ca into systemic circulation via basolateral membrane. It is also known that activated vitamin D takes part in growth and differentiation of intestinal epithelial cells.

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