I used clen in october when i was a slob. With a proper diet and cardio i dropped 40+ pounds. My body temp went up 2 degrees the entire time and i sweated like a whore in church, but i think it was great. Even for someone with high bf%. But constantly check your heart rate. I had high blood pressure and was scared. But after the weight loss and dieting, my bp is just about normal. Love that stuff