Complan Shake - Banana (4x57g). Complan Shake is a high energy nutritional supplement based on skimmed milk powder, carbohydrate and fat for the dietary management of disease related malnutrition. Complan Shake can be used to supplement the diet of patients unable to meet their nutritional requirements from regular dietary intake.. Complan Shake can be made up with whole milk or added to foods as a fortifier.