Advanced Gastric Mucosa Support. GS ZinCosa GI® is an advanced gastric cytoprotective formula designed to support and maintain the integrity of the protective mucosal lining. It offers enhanced protection from unwanted absorption of sensitizing proteins such as gluten and casein. This superior chelation technology aids in establishing a lower pH environment inhospitable to the growth of H. pylori. L-carnosine plays a protective role to the gastric mucosa by transporting zinc to damaged areas.