I recently decided to do a lifestyle change, along with a big change in my diet. Losing weight is a goal, but not neccessarily an overall purpose for the change. I've started to do three things - 1. Drastically cut down on the amount of added sugar. If a food/drink has anything more than 3g of it, I pass. But fruits are open season. 2. Intermittent fasting. I've started 15 hour daily fasts, and so far the hunger isn't getting to me. 3. Soy based Meal-replacement shakes. I have two of them during my 9 hour eating periods. I don't plan on doing them for longer than neccessary, just to get down to my ideal weight. But on Day 3 of starting this, after being awake only 12 hours and my eating period ended, I had an unnatural urge to fall asleep. I could compare it to taking a persciption sleeping pill. I was wide awake, and one hour later I was like a zombie. So I fell asleep and was surprised to awaken 10 hours later. I usually need 7 or 8 hours, maximum. So I'm curious Sherbros, I know this is a result of the diet change, and it's going to take a hell of alot more to get me to kick this diet. (I'm 6'0 and 220 pounds, and am going to get down to 200, 190, or 180 depending on how I feel and the difficulty). What is something I can add to my food consumption that'll add energy, but doesn't have caffeine?