How much protein is in yellowfin tuna per 100g?

A good rule of thumb is that yellowfin tuna supplies about 23 to 29 grams of protein per 100 grams. Raw yellowfin tuna typically sits toward the lower end of that range, while cooked tuna usually looks higher per 100 grams because cooking removes water and concentrates the nutrients.

If you are tracking macros, the safest approach is to use the nutrition label or a database entry that matches the exact form you ate: raw sashimi-grade tuna, grilled tuna steak, or canned tuna. Two pieces that weigh the same can have different protein values if one is drained, seared hard, or cooked longer than the other.

For context, 100 grams is a little less than 4 ounces. That amount is enough protein for many meal plans to count as a full high-protein serving.

Raw vs cooked: why the number changes

The protein in the fish does not magically increase when you cook it. What changes is the water content. As tuna cooks, it loses moisture, so 100 grams of the cooked fish contains more protein by weight than 100 grams of raw fish.

That is why nutrition apps and food databases can show different protein values for the same fish. Searing, grilling, baking, and smoking all tend to create a denser final product than raw tuna. Canned tuna can also differ depending on whether it is packed in water or oil and how well it is drained.

If you want accurate logging, weigh tuna in the state you are actually eating it and choose the matching food entry. That matters more than using a single generic number.

Nutrition beyond protein

Yellowfin tuna is valued not only for protein but also for being relatively lean. That means you get a lot of protein without a large calorie load, especially if you avoid heavy sauces or oil-packed versions.

It also provides important micronutrients, including selenium and vitamin B12, which support normal metabolism and red blood cell production. Like other tuna species, it can also provide omega-3 fats, though the exact amount varies by cut and preparation.

Because tuna is a seafood choice, it can fit well in heart-healthy eating patterns. Harvard Health and other nutrition organizations generally emphasize replacing more processed, higher-saturated-fat proteins with lean fish more often.

How to use yellowfin tuna in a high-protein diet

Yellowfin tuna works well when you want a meal that is high in protein but not heavy. A 100-gram portion can be paired with rice, potatoes, vegetables, or fruit to build a balanced plate for lunch, dinner, or after training.

If you are eating for muscle repair or appetite control, tuna is especially useful because protein tends to be more filling than carbs or fat gram for gram. For workouts, many people do well with a protein-forward meal within a few hours after training, alongside enough total daily calories and carbs for recovery.

If you use an app like Fitnit, camera-based meal logging can help you estimate tuna portions more consistently, and exercise tracking can help you keep your protein target aligned with training volume.

Tips

• Use 100 g as your tracking baseline, but switch to the exact raw or cooked database entry when possible.
• Choose lighter preparations like grilled, seared, or poke-style tuna if you want to keep calories lower.
• Drain canned tuna well before logging it, since packing liquid changes the final weight and macro count.
• Rotate tuna with other protein sources instead of relying on it every day.
• Build meals around tuna with vegetables and a carb source to improve satiety and recovery.