My answer to the previous comment - to increase muscle mass, he has nothing to do. This central nervous system stimulant. I can say working at 100%. Powerful. The effect is like, but be careful with the dose. I am with a mass of about 100 kg 1.5 scoop was a lot, strongly beating heart, and general discomfort. In the beginning, do not exceed more than 1 scoop. Action began to feel somewhere in 30 minutes. If you ate a tightly - the effect will decrease or be delayed. Expect time to you torknulo exactly in training, not after it. And do not consume it regularly, take a break and take in preference to hard training, or if there was a bad day for example. For the adrenal glands are not a safe thing for frequent consumption