From the #1 doctor recommended brand, Ensure Plus Nutrition Shakes provide complete balanced nutrition to help you gain and maintain a healthy weight. Each shake has 13 grams of protein and 26 essential vitamins and minerals. Survey of 321 independent-living adults aged 50-80 years old, who reported a lack of energy or appetite, added 1-2 servings of Ensure Original daily to their regular diet. Participants self-reported improvements in strength, energy, and activity.