ProtoSorb™ C is a unique combination of Transport C-PLUS® threonic Acid, alpha-lipoic acid, and bioflavonoids to increase vitamin C uptake.* Studies suggest that alpha-lipoic acid activates cells to allow for greater glucose transport and utilization of vitamin C.* This buffered blend also helps regenerate both vitamin C and glutathione.* Vitamin C is essential for collagen synthesis, a key factor for blood vessels, tendons, ligaments, and bone.*

• Antioxidant Protection of Vitamin C*
• Enhanced Cellular Absorption.