Clinically we have seen over the last several decades that Zinc can help support testosterone levels.
There have been multiple studies on the effectiveness of zinc in treating male infertility due to low testosterone levels.
In a study of 37 infertile men with decreased testosterone levels and associated low sperm counts. The men were given 60 mg of zinc daily for 45 to 50 days.
In 22 patients, testosterone levels significantly increased and mean sperm count rose from 8 to 20 million
References:
Tikkiwal M, et al. Ind J Phys Pharm 1987 Jan-Mar; 31(1):30-34.
Takihara H, et al. Urology 1987 Jun; 29(6): 638-641.
Netter A, et al. Arch Androl 1981; 7(11): 69-73.
