Tribulus terrestris, by Sopharma.
Tribestan is the most potent natural Testosterone-enhancing supplements in the world today. For the majority of people using it, strength levels will increase that will result in gains in muscularity and mass because you'll be able to train more intensely and heavier. Also protein utilization will increase and since muscle is comprised of and built with protein - the more you can utilize, the greater the possibility for growth.
