My diet consists of lots of protein, and barely any carbs. I drink 2-3 gallons of water every day, I eat a ton of tuna, salmon, etc, and my only carb intake is from Creatine. I am also on Whey. I work out 1-2 times per day, and I do lose energy. I may start having some carbs before my work out, but so far I've been doing fine. I dropped from 210lbs to 160lbs in about 4 months. Then I gained muscle up to 175, and then lost some more fat again, and now I'm back down to 160, and stronger than I ever was. Working out makes you stronger. Your diet multiplies your potential. If you know what I mean.