Shake FitProtein is a formula for physically active people that contains a number of active ingredients such as whey protein concentrate and isolate, collagen or inulin, enriched with coenzyme Q10, vitamin C and D and chromium. Proteins contribute to the growth of muscle mass and help to maintain it. Vitamin C helps in the proper production of collagen to ensure the proper functioning of blood vessels, bones, teeth, skin and helps to protect cells against oxidative stress. Vitamin D helps the immune system function properly. Chromium, in turn, contributes to maintaining the proper metabolism of macronutrients.