Now Sodium Ascorbate Powder is an inexpensive buffered form of Vitamin C and is Pharmaceutical Grade. Vitamin C is an essential nutrient well known for its vital role in immune system function. It is a highly effective antioxidant that can protect the body's structures from oxidative damage generated during normal metabolism. Sodium Ascorbate is a non-bitter, non-acidic, buffered form of Vitamin C in a highly soluble form.