As an immune system enhancer, vitamin C provides protection from oxidation, aging, tumors, and the harmful effects of pollution. It also prevents infections. It has been shown to reduce cholesterol, reduce high blood pressure, and prevent hardening of the arteries.
Vitamin C is one of the most powerful and really important anti-oxidants. Use calcium ascorbate for people eating fat and protein rich diets, especially on the inflammation reducing programs, and plain old ascorbic acid for people on carbo dominant low fat diets.
A healthy daily supply Vitamin C should include Bioflavonoids from varied natural sources, but for dealing with chronic pain and inflammation (the mini-scurvy), you need to a supply a large dose of good old ascorbic acid.
If you are on a mostly a fruit and vegetable diet, use plain ascorbic acid. If your diet is dominant in fats and proteins, you will do better with calcium ascorbate (not this product).