How much protein is in tuna?

Most tuna varieties are very protein-dense. As a general example, a 3-ounce cooked serving of tuna commonly provides around 20 to 25 grams of protein, though the exact amount varies by species and preparation. Canned light tuna is usually a bit leaner by calories than albacore, but both are high in protein.

To put that in context, tuna often gives you as much protein as many larger portions of chicken or lean beef, but with fewer calories when it’s packed in water. If your goal is to raise protein intake without adding a lot of extra fat or carbs, tuna is a strong option.

Which tuna is highest in protein?

Fresh tuna steaks, canned light tuna, and canned albacore all contain a lot of protein. The differences are usually more about calories, fat, and mercury than about protein. Albacore tends to have a milder flavor and slightly more fat, while light tuna is often lower in calories and mercury.

If you compare tuna packed in water versus oil, the protein stays fairly similar, but oil-packed tuna usually has more calories. For a high-protein, lower-calorie meal, water-packed tuna is often the better choice.

Is tuna a good protein for weight loss and muscle building?

Tuna can work well for both goals because it’s filling, portable, and rich in complete protein. Protein helps support muscle repair after exercise and can also help you stay satisfied after meals, which may make it easier to manage hunger.

For muscle-building meals, tuna pairs well with carbohydrates and vegetables, such as on whole-grain toast, in a rice bowl, or mixed into a salad. If you’re tracking workouts and trying to keep protein intake consistent, a tool like Fitnit can help with rep counting and form feedback during home training sessions.

What should you watch out for?

The biggest caution with tuna is mercury. Larger tuna species, especially albacore and some fresh tuna steaks, can contain more mercury than smaller fish. That matters most for pregnant people, young children, and anyone eating tuna frequently. The FDA and EPA recommend choosing lower-mercury seafood more often and limiting higher-mercury choices.

Sodium is another issue with some canned tuna products, especially if they’re heavily salted. Rinsing canned tuna can help reduce sodium a bit, and choosing low-sodium versions is a smart move if you’re watching blood pressure or overall salt intake.

Tips

• Choose water-packed tuna if you want the most protein for the fewest calories.
• Rotate tuna with other protein foods like salmon, eggs, chicken, beans, yogurt, and tofu to reduce mercury exposure.
• Check the nutrition label for sodium, especially on flavored or seasoned tuna products.
• Use tuna in balanced meals with fiber-rich foods like vegetables, fruit, or whole grains.
• If you eat tuna often, pay attention to serving size rather than treating it as an unlimited protein source.