Ensure is a nutritional supplement drink that can help individuals gain weight or maintain a healthy weight, according to the Ensure website. Each shake contains 11 grams of fat and 350 calories. Among physicians who recommend liquid dietary supplementation to their patients, Ensure is the top choice as of 2014.
Ensure is beneficial to individuals with nutritional deficiencies as well as those who are recovering from surgical procedures, according to Medline. Ensure contains vitamin C, vitamin E and selenium, antioxidants that promote immune health. Ensure beverages also contain high levels of omega-3 fatty acids that are essential for heart health. Ensure can be used as a supplement between meals and as an interim meal replacement.