Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride

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Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride (1997)
Institute of Medicine (IOM)

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. "7 Vitamin D." Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: The National Academies Press, 1997.

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DRI DIETARY REFERENCE INTAKES FOR Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride

FIGURE 7-1 The photochemical, thermal, and metabolic pathways for vitamin D₃. Specific enzymes abbreviated as follows: ∆⁷ase,7-dehydrocholesterol reductase; 25OHase, vitamin D-25-hydroxylase; 1α-OHase, 25-OH-D-1α-hydroxylase; 24R-OHase, 25(OH)D-24R-hydroxylase. Inset: the structure of vitamin D₂. Reproduced with permission, Holick (1996).