34.5.93 - nutrition

Adequate levels of vitamin D and low levels of calcium in the blood induce the following conversion of vitamin D in the kidney:

a. 7-dehydrocholesterol -> vitamin D3
b. 25-hydroxy-vitamin-D3 -> 1,25 dihydroxy-vitamin-D3
c. vitamin D3 -> 25-hydroxy-vitamin-D3
d. vitamin D2 -> vitamin D3
e. 25-hydroxy-vitamin-D3 -> 24,25-dihydroxy-vitamin-D3

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