EatLean Tasty Cheese Snack Bars

£3 (4 bars), eatlean.com

We know cheese is a good protein source, but these snacks are lower in fat than regular hard cheese and come in handy 30g snack packs. With 60 per cent less fat and 30 per cent more protein (10g in total) than standard cheddar, they’re an excellent portable, bite-sized option – and come in at just 80kcals.