Canned tuna is a healthy store cupboard standby. But if you're buying tuna, make sure you only buy tuna canned in water, not brine as it's too salty, and definitely not oil.
As a comparison, 100g of drained tuna in water has 113 calories and 0.5g of fat, whereas the same amount of tuna in oil has 189 calories and 9g of fat. Who needs the extra calories or fat?
Most main supermarkets stock their own brand of tuna in spring water as well as well known manufacturers including John West and Princes. And nutrition wise, they're all quite similar.The nutritional information below is for Sainsbury's Tuna in Spring Water.
Nutritional information: Per 100g drained: 113 calories, 27g protein, 0.5g fat, 0.75g salt.