Displaying 16 results of Ascorbic Acid Stable Isotopes Ascorbic acid stable isotopes are a set of isotopically labeled compounds used in biochemical and nutritional research. These isotopes have the same chemical structure as ascorbic acid, but differ in the number of neutrons in their atomic nucleus. They can be used to study the metabolism of ascorbic acid in the body, to determine bioavailability, and to track the fate of ascorbic acid in various food and drug products. These isotopes are stable and do not decay over time, making them ideal for long-term studies.