Why Do People Use Tribulus?
Tribulus is most often used for infertility, erectile dysfunction, and low libido. In the last decade, it has become popular to improve sports performance. Tribulus has become increasingly used for these conditions because research performed in Bulgaria and Russia indicates that tribulus increases levels of testosterone (by increasing luteinizing hormone), DHEA, and estrogen. However, the design of these research studies has been questioned. A recent study found that 4 weeks of tribulus supplements (at 10-20 mg per kg body weight daily) did not affect male sex hormones testosterone, androstenedione, or luteinizing hormone compared to controls. Erectile dysfunction Preliminary animal studies have found that tribulus heightened sexual behaviour and increased intracavernous pressure. This was attributed to increases in testosterone. Body Composition and Exercise Performance Although tribulus has become popular as a sports performance aid, one small but well-designed study found it has no
