Stuff is strong. I have been on for about a month and a half now. 2 weeks on, 2 off. The first time I ever took it, I bit a little piece off, about 1/8 of a tab and about 15 minutes later I thought my heart was going to rip threw my chest. I also had the shakes really bad. I got used to the sides. The most I will take is one tab per day. The only sides that I have are the shakes. I normally shake without taking anything, but the superclen makes it ten times as worse. I do not think it is as strong as he states it to be, but for the price it is definitely a good product. It is helping me keep my gains from my cycle. I am eating more when on the clen, doing cardio, but slowly losing some body fat but keeping my size. Hope this helps.