In the last few decades, Tribulus has come into its own in the old Soviet bloc, especially Bulgaria, where its use has created a modern legend as a libido tonic able to enhance sexual activity by improving and prolonging erections. As well, Tribulus has been found to have a stimulating effect on spermatogenesis by increasing the number of spermatozoa and their motility and viability.

This Chinese herb, named “yin yang huo”, also translates as “licentious Goat Weed,” suggesting desired lusty effects. Traditionally, it has been used to increase libido and improve sexual performance by correcting erectile dysfunction and premature ejaculation. Horny Goat Weed elicits a moderate androgen-like effect on the testes and the prostate, increasing sperm production while stimulating the sensory nerves by which it indirectly increases sexual desire.