However, most people who maintain a 10-15% body-fat percentage can likely get to around 8% body-fat using this program while still being able to build muscle in the process and not using any hormonal type supplements.. Protein is an important nutrient for weight loss. getting enough can boost your metabolism, reduce your appetite and help you lose body fat without losing muscle. protein shakes are an easy way to. Protein powder is only for people who are already doing the basics to build muscle, lose fat, and gain weight. however, if you want to buy protein powder by all means go for it. just don�t be surprised when it doesn�t work as you�d expect..
