Absolutely possible. The Catabolic or negative calorie diet does it for people every day. One guy lost 60 pounds in 60 days. You can check this diet out at www.barke.com. Be sure to drink the Appple cider vinegar recommended (filtered, unpasteurized - from health food store); the tablets are not the same, nor is pasteurized ACV from the supermarket.

This guy emailed me and said to drink the ACV and do 30 minutes of exercise each day. This is a LC diet as well - that's how it started off, then the doctor recommending it noticed that people actually lost more weight on this diet that people who are fasting. The negative calorie foods are listed on this site as well.

Good Luck.