These are a few studies that looked at increasing testosterone with different supplements. Most are small , done in rats and not well controlled, but they provide interesting data.
Click on each for more details (Thanks to Ergo-Log.com)
ABSTRACT Testosterone concentrations in males tend to decline with advancing age. Low testosterone, also known as androgen deficiency (AD), is associated with an increased risk of morbidity and mortality. Currently, the primary treatment for AD is testosterone replacement therapy (TRT), which...
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