For many people, studies show that intermittent fasting leads to increased fat burning and fast weight loss while retaining muscle mass by forcing your body to use up fat stores as fuel. (parsleyhealth.com)
Aside from retaining muscle mass, you'll also see a testosterone level increase, necessary for muscle growth. (healthnfitnesshops.com)
Most cats lose weight far more efficiently on a canned food than dry food diet: they lose body fat while retaining muscle mass. (littlebigcat.com)