In patients suffering from chronic renal failure (a condition linked to significantly depleted zinc levels) mega-dosing with 250mg/day of zinc was – as to be expected – able to significantly increase serum zinc, testosterone, and LH levels . Another study consisting of 37 infertile-subjects had the men take an undisclosed amount of zinc for 6-months and noted that the men who had testosterone levels on the lower end (less than 480 ng/dL) noticed significant improvements in testosterone and DHT levels, whereas the men on the higher levels of testosterone (more than 480 ng/dL) noted no increases in testosterone, but still significant increases in DHT levels. On an even more positive note, Nine of the subjects were able to conceive a child during the study period.
Testosterone is a hormone essential to the development of male growth and masculine characteristics. Testosterone products are FDA-approved only for use in men who lack or have low testosterone levels in conjunction with an associated medical condition. Examples of these conditions include failure of the testicles to produce testosterone because of reasons such as genetic problems or chemotherapy. Other examples include problems with brain structures, called the hypothalamus and pituitary, that control the production of testosterone by the testicles.