7-dehydrocholesterol


7-dehydrocholesterol 7-de·hy·dro·cho·les·ter·ol (-dē-hī’drō-kə-lěs’tə-rôl’, -rōl’)
n.
a provitamin present in the skin of humans as well as the milk of mammals that becomes vitamin d3 when exposed to ultraviolet light.

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