Buffered Vitamin C contains high-purity ascorbic acid buffered with carbonates of potassium, calcium, and magnesium. Developed by Stephen A. Levine, Ph.D. Serving Size: 0.5 Teaspoon Servings Per Container: 102 Amount Per Serving % Daily Value Vitamin C (as Ascorbic Acid) 1.067 1186%Calcium (as Calcium Carbonate) 202 mg 16%Magnesium (as Magnesium Carbonate) 107 mg 25%Potassium (as Potassium Carbonate) 45 mg 1% Other Ingredients: Microcrystalline CelluloseAs a dietary supplement, 1/2 heaping teaspoon or more in 8 to 12 ounces of liquid, between meals, or as directed by a healthcare practitioner. Two teaspoons supply approximately the recommended dietary allowances of calcium and magnesium.Keep in a cool, dry place, tightly capped.