I took NO-xplode for the past few weeks and I noticed a difference from the first day. My first day in the gym I got such a pump I had to stop my workout. It's actually like the commercial says once you train with it you'll never be without it. I increased most of my exercises by a rep or 2 almost instantly. At the end of 4 weeks I had gained 4lbs. Most people dont think that is much but when your already at your limits 4lbs is a ton.