Tuna

Tuna is a food item created by cooking Raw Tuna. Tuna can be useful to train with because it heals 10 hp while having low requirements to obtain. One needs 30 Cooking to cook raw tuna on a fire or range, yielding 100 experience.

Combining tuna with sweetcorn will make tuna and corn if a player has 67 Cooking, which heals a bit more than regular tuna. Potato with butter can also be added to tuna-and-sweetcorn to create a tuna potato, which heals 22 hp.

Tuna is also often used to train the Cooking skill. Considering its cost/xp ratio, it is a very cheap and efficient way to achieve 99 cooking, as cooking tuna will usually yield around 100,000 Cooking experience an hour.

Players will rarely burn tuna around 60 Cooking and will completely stop burning them at level 66 (63 with cooking gauntlets).