A proprietary blend of two herbal extracts Cocoa bean (Theobroma cacao) and pomegranate peel (Punica granatum), branded as Tesnor from ingredient supplier Gencor, was shown to improve serum testosterone levels (free and total) in a group of healthy young men, according to study published in the Journal of Dietary Supplements.

In-vitro testing has previously shown Tesnor increases in-cell testosterone production and inhibits aromatase activity.

The present randomized, double-blind, placebo-controlled trial included 120 male participants between the ages of 21 and 35. Subjects were separated into three randomized groups where they were dosed with placebo, Tesnor-200 mg, and Tesnor-400 mg over the span of 56 days.

During the trial period, all participants were instructed to perform 40 minutes of aerobic exercise for four days per week, maintain their regular diet plan, and refrain from consuming any nutritional supplements or energy drinks of ergogenic benefits.

The primary outcome showed that Tesnor had improved the serum testosterone level (free and total) of the active group compared with the placebo, with secondary outcomes of increased hormones (dihydrotestosterone, estradiol, LH, cortisol in serum), handgrip strength and MUAC (mid-upper arm circumference) in the higher-dose group set.

“We are thrilled to report that Tesnor is a tolerable, safe, and effective natural herbal blend that boosts testosterone levels in young, healthy males,” said Chase Shryoc, vice president of sales and business development for Gencor. “While this particular study is specific to young males, other studies have shown that daily doses of Tesnor have improved testosterone levels as well as reducing aging male symptoms scores.”

Tesnor has been tested with NSF and LGC for the absence of WADA prohibited substances. “With the results of this new Tesnor study, we are opening new doors in the worlds of sports nutrition and healthy aging,” Shryoc said.