Let me start by saying I love Jillian Michaels. She has a perfect body and is so positive and motivating. I used her products however and I was not happy with the results. They have alot of caffeine in them and it made me jittery. I now use the Dr. Max Powers Burn and ive lost about 10 lbs in a week, and I do not feel the jitters like I did with Jillian's product.