Best overall: eggs if you want the most versatile protein

Eggs made the list because they’re one of the easiest high-protein foods to use across breakfast, lunch, dinner, and snacks. A large egg gives you a modest amount of complete protein, and you can scale the serving up without much prep. They also bring choline, vitamin B12, selenium, and other nutrients that are harder to get from some other protein foods.

Why this matters: if you want a food you’ll actually eat consistently, eggs are hard to beat. They work well with veggies, toast, rice, potatoes, or salad, and they’re easy to cook in a way that fits your calorie target. For many people, that flexibility makes eggs the better default choice.

Best for lean protein: tuna if you want more protein for fewer calories

Tuna made the list because it’s one of the most protein-dense options in the grocery store. If your main goal is to raise protein without adding much fat or many calories, tuna is usually the stronger pick. That makes it especially useful during fat loss, meal prep, or post-workout meals when you want a lean protein anchor.

Why this matters: tuna can deliver a lot of protein in a small, convenient serving, especially canned or pouch-packed tuna. It’s also easy to pair with rice, crackers, wraps, beans, or a salad. If you’re trying to keep meals simple and high-protein, tuna is often the cleanest fit.

Best for muscle gain meals: use both, but tune the portion to the goal

For muscle gain, the better choice is often not eggs versus tuna, but eggs plus tuna at different times of day. Eggs are great when you want a more filling meal with some extra fats, while tuna is better when you want a leaner protein hit without making the meal too heavy.

A practical rule: use eggs when you want satisfaction and meal variety, and use tuna when you want to maximize protein efficiency. If you train at home, Fitnit can help you keep strength sessions consistent with automatic rep counting and camera-based form analysis, which can make it easier to pair your protein choice with a reliable training routine.

Best for frequency and safety: eggs are easier to eat often, tuna needs limits

Eggs made the list for frequent use because they’re generally easy to store, cook, and repeat across the week. Tuna also fits busy schedules, but it’s smart to avoid making it your only protein source every day. The bigger issue is mercury exposure, which is why many people rotate tuna with other proteins instead of relying on it constantly.

If you love tuna, keep it in the rotation and balance it with eggs, yogurt, chicken, beans, tofu, or fish lower in mercury. If convenience is your main priority and you want a lower-maintenance staple, eggs usually win.

Tips

• Choose tuna when you want the most protein with the fewest calories.
• Choose eggs when you want a more filling, flexible meal that’s easy to repeat.
• Rotate both across the week instead of making tuna your only protein source.
• If you’re cutting, build meals around tuna or egg whites; if you’re bulking, whole eggs can help add calories and satiety.
• Add a carb and a vegetable to either one for a more complete meal.