Hey guys, I just started Intermittent Fasting a little over a week ago. I've been doing 18 hour fasts daily, and I've been eating at at least maintenance every day. I haven't had a chance to weigh myself since I started until today, and I was 5 pounds lighter. I know for a fact that I haven't lost 5lbs of fat that quickly. I'm more or less just doing this to stay lean through my bulk. I've been on a constant habit of drinking at least a gallon of water a day, so, I don't think it's water weight, so, I'm worried that the 5 pounds I lost could mainly be muscle. I'm aware that weight fluctuates a couple pounds on a regular basis, but, 5lbs lighter in a week just doesn't seem right, especially since I've kept everything constant. Anyone have any advice, or an explanation of what may have caused this? I know I don't have much to offer as far as reps go, and I'm on spread, but, I'd really appreciate it if somebody could help me out. I'm hoping I haven't loss progress in my bulk..