Berocca Boost is an effervescent tablet that dissolves in water to provide a refreshing drink that can give you a boost when you need it most. Berocca Boost can stimulate and energise you. It contains Guarana which contains natural caffeine, which can help you feel more awake and alert. Essential vitamins Berocca Boost contains the essential B vitamins that work to convert your food to fuel, helping in energy release. Natural caffeine It also contains, Guarana, a natural source of caffeine, that helps improve your concentration and alertness, and may help to quickly decrease tiredness and increase accuracy. Safe to use Berocca Boost does not contain sugar, so it is the ideal way to get the boost you need.