Ascorbic Acid is another name for Vitamin C. Vitamin C is a popular antioxidant and one of the most widely used vitamins in the world. Fine Ascorbic Acid is a bioavailable form of Vitamin C in a powder form, so it can be combined with other powdered supplements or dissolved in liquid for easy ingestion.
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."
As a dietary supplement, take 1/2 level teaspoon 1 to 3 times daily, in juice or water.