GNC B-Complex + Energy: Supports Metabolism and Energy Production GNC B-Complex + Energy combines 8 key B-vitamins with 100 mg of caffeine to fuel mental alertness and performance. B-vitamins help to convert food to fuel and support metabolism and energy production. Because your body cannot store B vitamins for long periods of time, providing your body with adequate amounts is very important. Caffeine also has thermogenic properties to support calorie burning. GNC B-Complex + Energy contains B-vitamins to support metabolic processes in the body Features 100 mcg vitamin B-12 for energy production and red blood cells Includes caffeine to support focus and mental alertness Gluten free, no sugar, no corn, no soy, no dairy, sodium free No artificial colors, no artificial flavors Contains 100 mg of caffeine. These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.