Duo bar 24 x 65g duo bar has been developed by professional sports nutritionists and is based on race food used by professional cycling teams its what the pros eat each duo bar is pre cut into two equal pieces with each piece delivering 20g of carbohydrate one ote serving duo bar is ideal to use before during or after exercise or as an alternative healthy snack when you are on the go 2 x 20g pieces of carbohydrate per bar enough for 45 60 minutes of energy depending on the intensit