Value Size Bilayer Tablets Quick + Sustained Releases Promotes Glutathione and Antioxidant Status Dietary Supplement Gluten Free Vegan Bilayer Sustained Quick Suitable for Vegetarians/Vegans Alpha Lipoic Sustain is in a special Sustain bilayer Quick Release/Sustained Release format to maximize and sustain 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, a critical component of the body's endogenous antioxidant network. 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.