Systemic Formulas CZI (Vitamin C, Zinc, Immune Support) is a bioavailable, whole-food-based vitamin C complex designed to support immune function, collagen synthesis, antioxidant protection, and cellular health. It combines buffered vitamin C with plant co-factors and bioflavonoids to enhance absorption and utilization, making it gentle on the stomach and effective for daily use. CZI helps fortify the body’s defenses, promote healthy skin and connective tissue, and combat oxidative stress for overall wellness. The ultimate Vitamin C complex with ECGC for optimal cellular nutrient uptake. Clinical studies show that EGCG may inhibit the formation of advanced protein glycation end products (AGEs) induced by dehydroascorbic acid (DASA), the oxidized form of ascorbic acid and a reactive dicarbonyl species.