NutriCology Buffered Vitamin C Powder Description: With calcium, magnesium, and potassium as ascorbate chelates in solution. Buffered Vitamin C provides macrominerals calcium, magnesium and potassium carbonates which become mineral ascorbates in solution with a buffered, alkalinizing action (pH 6.8 in water). Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.