Natural and artificial flavor. Focused, clinical nutrition. No. 1 doctor recommended brand. Revigor. Immune Balance. Serious nutrition for your health goals. 13 g protein. Prebiotics + antioxidants (vitamins C, E and selenium). Amino acid metabolite. 24 vitamins & minerals. Focused clinical nutrition for your health goals. Proper nutrition is important when you're trying to bounce back. So, Ensure Clinical Strength has Revigor (source of HMB, an amino acid metabolite) and also is an excellent source of protein to help rebuild muscle and strength naturally lost over time, Immune Balance to support digestive tract health and the immune system. Gluten-free; suitable for lactose intolerance.