Supports Energy & Immune Function Herbal Health Herbal Supplement B-12 Provides Energy Support by Aiding in Conversion of Food Into Energy Guaranteed Quality Laboratory TestedOver 40 Years of Trusted QualityAt Nature's Bounty, we are committed to your health. For over 40 years we have been making trusted products, backed by science, and made with only the purest ingredients.. guaranteed. So you can get the most out of life every day.