Tribulus can increase the amount of luteinizing hormone (LH) produced by the body’s pituitary gland. LH stimulates the testes to secrete the male hormone testosterone. It is commonly known that testosterone improves the body’s ability to build muscle mass and strength. That’s why synthetic testosterone supplements (in the form of anabolic steroids) are used. However, it should be emphasized that tribulus is not a hormone supplement. By promoting the production of the body’s own hormones, it works only within the body’s natural limits to help men achieve their strength and muscular potential.
Eurycoma longifolia increases hCG-induced production of testosterone via stimulation of leydig cells. There are many anecdotal reports on the internet where people indicate that they had testosterone levels tested before and during eurycoma supplementation, and it caused an increase. Avena Sativa has been demonstrated to free up testosterone, which becomes increasingly bound to various compounds within the body with advancing age. Bound testosterone is not as effective as free testosterone.