If you’re over the age of 30, you may be suffering from a natural decline in testosterone called andropause. An estimated 13 million men in the United States live with low testosterone, and most men are unaware of their condition. First off, there is no one-size-fits-all formula that will work wonders for every guy. Everyone's system is different, and not everyone has the same levels of testosterone to begin with.
At the end of the study, males who used vitamin D had higher testosterone levels, while those who took the placebo saw no significant increase in testosterone. For some men, testosterone replacement therapy can help improve sex drive, ease symptoms of depression, and increase energy levels.