Herbalife Formula 1 Nutritional Shake Mix is a soy protein-based shake mix available in vanilla, mango, and chocolate flavors. It contains 19 vitamins and minerals as well as high quality soy protein that scores well on the PDCAAS protein quality scale. Each serving contains 9 grams of soy protein and can be mixed with water, juice, or skim milk to provide nutrition and protein to support a healthy diet and potentially reduce the risk of heart disease.