Alpha Lipoic Sustain 300 is in our SUSTAIN bilayer Quick Release/Sustained Release format to maximize blood levels and to minimize gastric irritation and blood sugar fluctuations. Alpha Lipoic Acid is a unique lipid and water soluble antioxidant that is a cofactor in energy production, helping to regulate glucose metabolism. ALA also promotes the synthesis of glutathione. Biotin is added for optimum ALA activity. The advanced bilayer SUSTAIN tablets combine 1/3 Quick Release and 2/3 Sustained Release formats to both immediately raise and to maintain blood levels over a longer period of time.