Peak X Keto The other problem with water-weight loss is that women are deceived into believing that they're losing fat. In reality, once carbohydrate intake resumes (even the good carbs) and the water weight is restored, women mistakenly believe they've regained all the "fat" they had lost on their diet programs. #3 - LBM Reduction Reduction in muscle mass is a common result of any type of low-calorie, low- carbohydrate, or starvation program. In fact, as muscle mass is lost, metabolism slows. A daily intake of less than 1000 calories is considered starvation, and the human body will automatically try to salvage body fat just for survival. #4 - Decrease in Energy When calories are restricted, especially carbohydrates, the body's main source of energy is limited.