Tweetuse both bro. Not at the same time but do 2 wks of clen than swithch to 2 wks of ephedrine. I droped 25 lbs last summer doing that. Alot was fat and a bit was muscle. I used it without any aas so i took a hit on loosing muscle but i didnt really care. I got weak too so you might want to take it with some test...