This product is irrational. Vitamin C = ascorbic ACID can only be absorbed under the acidic conditions of the stomach. With extended release the vitamin C won't be released until too late, and will simply become a "treat" for the bacteria of the gut.
I was very disappointed to find a product supposedly good for my health that had HYDROGENATED COTTONSEED OIL in it. If I had know that before I opened the package I would have returned it. I will not buy it again.