Prosure Ready To Drink Vanilla is an oral nutritional supplement which is enriched with omega-3 fatty acids and antioxidants. ProSure contains a mix of fiber and FOS (fructo-oligosaccharides). Fiber and FOS have an important role in the diet by helping to support gastrointestinal function. ProSure is suitable for oncology patients with weight loss. It also contains vitamin A, B6, B12, C & D, which supports the normal function of the immune system, niacin & vitamin B6; helps to reduce tiredness and fatigue, also helps in improving muscle strength.