PepZinGI® Zinc-Carnosine Supplement Zinc Carnosine contains the PepZinGI® brand of zinc-carnosine to support healthy gastrointestinal mucosa and relieve mild gastric discomforts.* After years of development, a Japanese company produced PepZinGI, a novel patented crystalline chelate compound consisting of L-carnosine and zinc. The zinc-carnosine complex is typically dosed one 75 mg capsule twice per day. This provides 16 mg of elemental zinc twice daily.