Free Radical Scavenger With Grape Seed Extract & Bioperine A Dietary Supplement Vegetarian - Vegan How It Works: Alpha-Lipoic Acid (ALA) is a versatile free radical scavenger that helps to maintain neural health by promoting nerve cell glutathione production, preserving optimal blood flow, and supporting normal nerve cell glucose utilization. ALA may help to support the maintenance of healthy neural tissues, proper glucose metabolism, and normal cardiovascular function. Bioperine is a standardized pepper extract that is known to enhance the bioavailability of some nutrients.