My partner and I have been taking Con-Cret for about 6 months now. The 1st thing you will notice with it is that you will not feel nearly fatigued at the end of your workout. Keep in mind, it is not a stimulant, so your not going to feel "AMPED" when you take it. It is something that has to get into your system over a period of about two weeks before you start making noticeable gains. But at that point, you will notice significant gains in strength and rock hard muscle. So to answer your question, YES! In my opinion and experience, Con-Cret is and exceptional product! I swear by it! Go and get some! Don't buy it from GNC. It is overpriced there. Either get it online or have your local wholesale supplement shop supply it.