Do you want to lose weight, gain muscle mass and strength, or improve your metabolic health? Then make sure you’re getting enough protein in your diet. Protein is a vital macronutrient needed for every part of your body. It’s used to build and repair tissues, make enzymes, hormones, and other body chemicals. In fact, if you’re not getting enough protein, you likely have flabby muscles, are generally weak, and have brittle bones — among other issues. Here are the reasons you need more protein in your diet.