I am on my second cleanse and am also on day 6. It does get better, stick with it. I only gained back two pounds after my first cleanse, I stayed at that weight for about six months. Then I began to eat like all kinds of bad foods again and that is when I gained the weight back. I didn't feel or look like I lost muscle but I can't really be sure. My metabolism is lousy to begin with. I don't think it had any bad effects. Good luck and hang in there!