Ephedrine is extremely potent. I highly recommend it, but you have to find the authentic product. It's almost impossible to be honest. I've tried a variety of websites since Kaizen has been discontinued in the UK. I find 30mg to be sufficient for me. And it's more effective coupled with an ECA stack. I did have some luck in the past, however! Not sure if I'm allowed to share links on this site, but the stuff these guys sell is the closest to Kaizen as i've ever been. The product is extremely effective. I've shed a lot of weight and am getting close to 10% body fat. It's definitely worth it. Anyway yeah here's the link Ephedrine UK (Sorry for my English i'm from Iceland)