Energy bar

Pack one for a break when you want a handy snack; have water with it, especially if you’re walking for several hours. If you’re trying a new bar, test it on an ordinary walk rather than a big day out.

It can be a convenient part of breakfast when you’re short on time, but pair it with yoghurt or milk and a piece of fruit for a more substantial start. The NHS Eatwell Guide recommends getting a range of foods across the day.

Most unopened bars can be kept in a cool, dry cupboard. Keep them out of direct sun and hot cars, where chocolate coatings can soften, and follow the packet’s storage advice once opened.

Bars may contain nuts, peanuts, milk, soya, sesame or cereals containing gluten. For prepacked bars, the Food Standards Agency says allergens must be emphasised in the ingredients list; also read any “may contain” warning.

An energy bar has 11 g of protein per 100 g, compared with 8.1 g in a cereal bar.

A protein bar has 36.7 g of protein per 100 g, compared with 11 g in an energy bar. Check the type of bar that suits the snack you want, rather than relying on the name alone.