Gastrointestinal toxicity is common during cancer therapy, and most treatment options are not helpful for the majority of patients. A recent study using a mixture of amino acids show decreases in mucositis and gastrointestinal toxicity following irradiation. This study was conducted in order to evaluate how the amino acid-based beverage benefited cancer patients receiving chemotherapy and/or radiation therapy. The use of the beverage was shown to reduce gastrointestinal toxicity in patients undergoing cancer treatment. There will be additional clinical studies to further effects of how this medical food to evaluate the benefits.