Potassium 200mg & Vitamin C 50mg Tablets. Potassium (from Potassium Chloride) –200mg (10% NRV ). Vitamin C (Ascorbic Acid) –50mg (63% NRV ). Potassium Chloride, Vitamin C (Ascorbic Acid), Magnesium Stearate, Microcrystalline Cellulose, Di-Calcium Phosphate.