ZMA Does Not Boost Testosterone - Mind And Muscle

guy sitting curlingZMA supplements are often marketed to improve sleep quality and boost testosterone levels. There are some anecdotal reports of ZMA aiding in sleep quality and muscle gain, while other users report no effects whatsoever from the supplement. A study published in the European Journal of Clinical Nutrition investigated the effects of ZMA on testosterone levels.

The study included 14 healthy male subjects. All of the subjects exercised regularly and had a sufficient dietary zinc intake of 11.9-23.2 mg daily. 2 weeks before beginning supplementation with ZMA, the subjects were asked to discontinue use of any zinc containing supplements. The subjects were split into two groups, and for 56 days all subjects took either the standard dose of ZMA or a placebo supplement at least 1 hour after their last meal before going to sleep at night.

No differences whatsoever in total testosterone, free testosterone, or indicators of testosterone changes were seen between the group consuming ZMA and the group consuming the placebo supplement. Based on the results of this study I would not expect significant gains in muscle or strength from ZMA. As far as improving sleep goes, while many users report improved sleep quality there is definitely better and more cost effective options available in this area.



Koehler K, Parr MK, Geyer H, Mester J, & Schanzer W. (2009). Serum testosterone and urinary excretion of steroid hormone metabolites after administration of a high-dose zinc supplement. European Journal of Clinical Nutrition. 63(1), 65-70.

ABOUT THE AUTHOR: Cassie is a chemistry major and national level bodybuilder. Questions or comments? Talk to Cassie on the FORUM or on FACEBOOK.

DISCLAIMER: The information on this website reflects the opinion of our staff and manufacturer’s and should not be interpreted as medical advice. The information is not unbiased or independent and is the opinion of the owners of The descriptions and statements accompanying these products and vitamin supplements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure or prevent any disease.

ZMA Does Not Boost Testosterone

PCT + AI Stack + 2 items
someone from Concord
Total order for 54.45 USD
someone from Waco
Total order for 89.45 USD
Rad Bod Stack + 5 items
someone from Killeen
Total order for 134.90 USD
someone from Lees Summit
Total order for 64.49 USD
Liquid Labs T2
someone from Elnhurst
Total order for 72.97 USD