Yes, canned tuna is a great option for a keto or low carb diet. It has a very low carb content and it's easy to store. You don’t even need to refrigerate the cans. It's also really inexpensive. It’s much cheaper than fresh cuts of tuna, and if you buy the generic brands, you can save even more money.  All things considered, if you eat a low carb diet, it’s a fabulous idea to add some canned tuna to it.