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"This stimulates muscle growth and enhances strength and endurance. In addition, the studies have shown that However, the most important thing is that this plant stimulates the production of luteinizing hormone. As a consequence of the increase in its levels, the natural secretion of testosterone also increases. This effect of Tribulus terrestris was proven during the oral toxicity study.

A group of scientists, such as Vinod Nair, Surender Singh, and Yogendra K. Gupta used male albino rats with impaired sexual function for experimental purposes. The rats took Tribulus terrestris for 28 days. During this period, sexual behavior of the rats has changed positively. Thus, their libido increased, and erections became more frequent and strong. This happened due to the serum testosterone levels rise."