4:1 Bar is an advanced fuel for use during exercise. It contains 4 parts carbohydrate to 1 part protein. It"s the perfect complement to the High 5 4:1 Energy Source drink range. 4:1 Bar is made from a new generation of protein crisps & real cranberries, for a great natural taste. Research shows that a carbohydrate / protein combination can reduce muscle damage during exercise & increase post exercise muscle synthesis when compared to a carbohydrate only drink. Less muscle damage during exercise & more rapid recovery afterwards leads to stronger more resilient muscle, lower risk of injury & more rapid fitness gains.