Vitamin D Promotes Testosterone Production

Vitamin D is produced in the skin in a reaction involving cholesterol and sunlight. It is also consumed in the diet. It is important for bone health but it might also help prevent some kinds of cancer, cardiovascular disease, depression and dementia. Austrian scientists found that vitamin D is also important for testosterone synthesis in testicular cells in the laboratory. They isolated tissue from human testes and added vitamin D in combination with luteinizing hormone and IGF-1, both of which stimulate testosterone production. The addition of vitamin D enhanced testosterone formation. It is not known whether these results apply to supplemental vitamin D in living people. (Journal of Clinical Endocrinology Metabolism, 99: 3766-3773, 2014)

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