These are monomeric formulas of low molecular weight which require minimal digestive effort and are easily absorbed without leaving much residue. Carbohydrates are present in these diets as oligosaccharides, sucrose and glucose. As these diets are predigested, they are easily absorbed and are ideal for patients with pancreatic insufficiency or short bowel. These diets consist of intact proteins, complex carbohydrates, fat and residue. The various types of polymeric formulas include milk based diets and lactose free diets which are preferred in critically ill patients and in lactose-intolerant patients.
Polymeric diets are of high molecular weight and are of relatively low osmolality.
These formulas are available as individual nutrients. Various nutrients can be mixed according to the need of the patient. Various enteral formulas used at our center are shown in Table 1 . Table II enlists few examples of commercially available formulas. Sepsis, Trauma and Burns Stress caused by sepsis, burns and trauma, results in release of various hormones in the body.