When you eat carbohydrates, your body bulks up your muscles with glycogen for quick energy. Eat a high-carb diet for three days, and you may add about two pounds of muscle mass on your arms and legs.2432 Those glycogen stores drain away on a low-carb diet and pull water out with them. The ketones also need to be flushed out of the kidneys on a ketogenic diet, accounting for the diuretic effect.2433
