Lets see what is the opinion and experience of Mr. Olympia - Lee Priest: a former International Federation of BodyBuilders (IFBB) professional bodybuilder and a current National Amateur Body-Builders' Association (NABBA) professional athlete. He speaks about the amaizing effect of natural herbal liquid extract of Bulgerian Tribulus Terrestris Max of the company Cvetita Herbal. Brand with proven quality products. Tribulus is a powerful ingredient with a strong effect over testosterone levels. Tribulus stimulates luteinizing (LH)hormone, which is responsible for the production of testosterone in men and estrogen in women.Tribulus Max is a 100% natural water-ethanol extract of Tribulus Terrestris herb. Tribulus Max has an extremely powerful effect on testosterone levels. In the world of Bodybuilding, Bulgarian Tribulus is used to increase strength, endurance and muscle growth due to its enhancement effect on testosterone. Tribulus Max liquid form is absorbed into the body more quickly and efficiently. If you want to learn more about Cvetita Herbal follow this link http://www.cvetitaherbal.co.uk/