Drawbacks of Nutritional Support diffusion in Peru are presented within current Latin-American technological reality. That reality is compared to widespread use of antibiotic therapy versus a marked lack of use of Nutritional Support. Those factors are against immunity of seriously compromised patients as Enteral Nutrition has positive effects on a patient s immunity.Four patients treated with three kinds of enteral formulas during a prospective study serve as examples to show the suitable consequences of using Enteral Nutrition and why Nutritional Support should be legally enforced and regulated in Peru.