Been using some IP Clen I had left over and was running 60mcg. I was running low and contact Purchase Peps on their Clen. They sent me a bottle of the Clen to research. The first morning of the research was awesome. The Clen hit in about 20 minutes using 80mcg...the body had side effects for hours!!! I will say that it was and is the strongest Clen I have ever used!