Animal studies show that zinc deficiency is associated with low testosterone, abnormal testicular function, and infertility.[1][2][3][4] Some human studies have reported similar observations,[4][5][6][7] but because of the lack of clinical trials, conclusions about the effect of zinc supplementation on sperm health or fertility aren’t currently possible.[8][9][7][10]
Does supplementation with zinc improve sperm health or fertility?
Written by:
Fact-checked
by:
•Last Updated: May 16, 2025
Zinc deficiency has been associated with low testosterone, abnormal testicular function, and infertility in animal studies, and some human studies suggest similar findings. However, due to the absence of clinical trials, definitive conclusions about the effect of supplemental zinc on sperm health or fertility cannot be made.