Eat Natural Bars

From £2 (pack of 3), most supermarkets

A popular grab-and-go snack, these bars also work well for endurance outings. Fruit and nut-based, and gluten-free, they provide around 215kcals, 23.6g carbohydrate and 2g protein. There are a number of great-tasting flavours available, including our favourite: dark chocolate with cranberries and macadamias. Eat Natural also provide higher protein bars, with the chocolate and orange providing 11g protein, with 14g carbohydrates.