Alpha Lipoic Sustain 300 (with Biotin), Jarrow Formulas, 300 mg, 60 Sustained Release Tablets Sustained Release Promotes Glutathione and Antioxidant Status Alpha Lipoic Acid 300 is a sustained release format to minimize gastric irritations and blood sugar fluctuation. Alpha Lipoic Acid is a disulfide molecule (containing two thiol groups). A thiol (or -SH) consists of a sulfur and a hydrogen atom. This antioxidant is both lipid and water soluble, a potent promoter of glutathione synthesis and cofactor in energy production, helping to regulate glucose metabolism. Biotin is added for optimum ALA activity. Usage: Take 1 to 2 tablets per day with meals, or as directed by your qualified health consultant. Keep out of the reach of children. Supplement Facts: Serving Size 1 Tablet Other Ingredients: Microcrystalline, cellulose, methacrylate polymer, calcium phosphate, magnesium stearate, silicon dioxide and vanilla. Contains NO common allergen. "