The raw materials of Tribulus Terrestris extract itself contains THC, but most suppliers and customers haven't realized this problem, some suppliers have no idea what THC is. The result is that almost all of tribulus products on the market contain THC. THC is the main psychoactive substance found in the Cannabis plant (Marijuana) , which is the most commonly used illicit drug in the world. A long-term use of Tetrahydrocannabinol (THC) cause serious health problems: cognition decreasing, lung cancer, anxiety disorder, depression and immune system collapse. Highest potency THC-free Tribulus standardized extract. .Protodioscin is not needed for real results and this formulation is well tolerated with no risk of gastrointestinal upset. Meets or exceeds USP standards for metals, pesticide/solvents residue, microbiological contaminants. 100% natural, no additives. Total plate count less than 1,000 without irradiation.