Ensure Enlive Nutrition Shake is the first and only complete, balanced nutrition beverage with the unique ingredient beta-Hydroxy beta-methylbutyric acid (HMB) plus 20 grams of high-quality protein per serving to help maintain and rebuild muscle mass for strength and energy. It is also an excellent source (610 milligrams per 8 fluid ounce) of plant-based omega-3 alpha-linolenic acid (40% of 1.6 grams Daily Value) for heart health.