Ensure is a nutritional supplement brand that was founded in 1993 by two doctors, Dr. Mark Friedman and Dr. Michael Levey. It is a line of meal replacement shakes, bars, and powders that are designed to provide balanced nutrition and help people maintain a healthy lifestyle. The products are made with natural ingredients and are free from artificial sweeteners, colors, and preservatives. They are also gluten-free and non-GMO. ENSURE products are available in a variety of flavors and can be purchased online or in stores.