Now Foods Sodium Ascorbate, 3-pound
Sodium Ascorbate is buffered (non-acidic) and will not contribute to gastric irritation in acid-sensitive persons.Sodium Ascorbate is synthesized from a combination of Sodium Bicarbonate and Ascorbic Acid to form Sodium Ascorbate.  NOW®Sodium Ascorbate Powder is an inexpensive buffered form of Vitamin C and is Pharmaceutical Grade.  From the FDA's website: "Some scientific evidence suggests that consumption of antioxidant vitamins may reduce the risk of certain forms of cancer. However, FDA has determined that this evidence is limited and not conclusive."