18 Easy Ways to Increase Your Testosterone

Vitamin D

Vitamin D is arguably the most important vitamin when it comes to testosterone. A study published in the Journal of Clinical Endocrinology examined the relationship between vitamin D supplementation and testosterone levels in men. The authors found that participants with higher levels of vitamin D had significantly higher levels of free testosterone compared to those with insufficient levels of vitamin D.⁸ Based on these study results, it appears vitamin D has a strong relationship with testosterone levels.