Buy RS3 Tuna potato
The tuna potato is a members-only food in RuneScape 3. It is a baked potato topped with butter, tuna, and sweetcorn. Each one heals up to 2,125 life points. You need a Constitution level of 85 or higher to get the full healing amount.
Tuna potatoes are one of the best foods for combat. The high healing makes them a strong pick for boss fights, Slayer tasks, and long trips where you take a lot of damage. They are not stackable, but they are tradeable and can be turned into notes.
Making one yourself takes work. You need 68 Cooking, plus a bowl, a knife, and a range. The recipe uses a potato, a bucket of milk, raw tuna, and sweetcorn. Each part must be cooked or prepared before you put the topping on the potato. The final step never burns.
Buying tuna potatoes skips all of that prep. You get a ready-to-eat food with strong healing, so you can spend your time fighting instead of cooking. It is a simple way to keep your inventory stocked for tough battles.