Food supplement Why take Berocca® Boost? Improves alertness and concentration^1 Contains guarana, a natural source of caffeine Just 1 tablet contains nutrients including Vitamins B1 & B2 to help you keep going^2 Supports energy release^2 Reduces tiredness and fatigue^3 How does Berocca® Boost work? 1^ Caffeine helps improve your alertness and concentration 2^ Vitamins B1 & B2 each work with your body to naturally generate energy from your food 3^ Vitamin B12 contributes to the normal formation of red blood cells and helps reduce tiredness and fatigue