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Garlic Supplementation May Be Anabolic

A recent study examined the effects of garlic supplementation on testosterone production and cortisol levels in rats fed a high-protein diet (1). After 28 days of feeding, rats that were supplemented with garlic had higher concentrations of testosterone in their testes and lower blood levels of corticosterone compared to rats not given garlic. Corticosterone is a catabolic hormone in the rat that breaks down muscle and is equivalent to cortisol in the human. In another experiment, a component of garlic (diallyldisulfide) was given to rats at different doses. The higher doses resulted in increased lutienizing hormone (LH) from the brain. LH stimulates production of testosterone from the testes. This study provides evidence that garlic may not only increase testosterone but also decrease the catabolic hormone cortisol. The end result is a much more favorable environment to support muscle growth.

1. Oi Y, Imafuku M, Shishido C, Kominato Y, Nishimura S, Iwai K. Garlic supplementation increases testicular testosterone and decreases plasma corticosterone in rats fed a high protein diet. J Nutr. 2001 Aug;131(8):2150-6.