Tribulus terrestris has been scientifically proven to support testosterone production without any clinically proven toxic effects. Many different cultures have used it for a number of purposes. The Greeks used Tribulus terrestris as a diuretic and a mood-enhancer. Indians used it as a diuretic, antiseptic, and anti-inflammatory. The Chinese used it for a variety of ailments. The people of Bulgaria used Tribulus terrestris as a sex enhancer and to treat infertility.