Effects of vitamin D on sex steroids, luteinizing hormone, and testosterone to luteinizing hormone ratio in 307 infertile men.
Rune HoltSam Kafai YahyaviIreen KooijNadia Nicholine PoulsenAnders JuulNiels JørgensenMartin Blomberg JensenPublished in: Andrology (2023)
Vitamin D + calcium supplementation did not alter sex steroid production in infertile men. However, vitamin D insufficient men treated with vitamin D supplementation had a significantly higher testosterone/LH ratio compared with placebo-treated men, suggesting that optimal Leydig cell function are dependent on adequate vitamin D status.