High One B1 Complex is a combination of all the B vitamins and is particularly high in B1, which contributes to the normal function of the heart and nervous system. Vitamins B1, B2, B3, B5, B6, and B12 help reduce tiredness and fatigue. 100% active ingredients formulated by expert nutritionists. Convenient capsule format, suitable for vegetarians. Directions for use: As a dietary supplement, take 1 capsule daily with food.