My wife and I started our diets at the same time. she did the low carb and i did low calorie. she lost more faster then me. now a year later she gained most of hers back and lost ALOT of muscle and she is alot weaker. your muscles need the carbs. lack of carbs will equal loss of muscle. she is now on a low calorie diet. read this and make sure you click here for part 2. read up and learn about carbs before you try a low carb diet.