The rate of testosterone supplementation has nearly quadrupled in the United States since 2000, according to new research published online January 1 in the Journal of Clinical Endocrinology & Metabolism.

While testosterone levels naturally decrease gradually with age and in the presence of factors including chronic disease, obesity, or smoking, most guidelines recommend supplementation only when patients have symptoms and have low testosterone levels that are confirmed by repeated laboratory tests.

Test the levels before you act, i.e. buying into a marketing hype or getting a prescription – Presentation by Henry R. Black, MD.