Quick nutrition comparison

At a basic level, both tuna and chicken are nutrient-dense protein foods. A plain, skinless chicken breast is typically higher in protein per calorie and usually lower in mercury concerns. Canned tuna can be similarly high in protein, but sodium can vary a lot by brand and preparation, and mercury matters more than it does with chicken.

According to USDA nutrition data, both foods can fit into a healthy diet. The better option for you often comes down to the exact product: tuna packed in water vs oil, low-sodium vs regular, and chicken that’s plain vs breaded, smoked, or heavily seasoned.

When canned tuna is the healthier choice

Canned tuna is a strong option when you want a shelf-stable, affordable protein that requires almost no prep. It’s especially useful for quick lunches, travel, and high-protein meals when cooking isn’t realistic. Light tuna generally has less mercury than albacore tuna, which makes it the better everyday choice if you eat tuna regularly.

Tuna can also be a good source of protein with very little fat, depending on the type and whether it’s packed in water. The main downside is that tuna is a fish with measurable mercury content, so it’s smart to follow guidance on how often to eat it, especially for children and people who are pregnant or trying to conceive.

When chicken is the healthier choice

Chicken is usually the better all-around choice if your main goal is lean protein with fewer nutrition concerns. Plain chicken breast is typically lower in sodium than many canned tuna products and doesn’t carry the same mercury issue. That makes it easier to eat more often as part of a balanced diet.

Chicken is also more flexible. You can roast, grill, shred, or batch-cook it and control the salt and fat more easily than with many convenience foods. If you’re building meals around muscle gain, fat loss, or general healthy eating, plain chicken breast is often the simplest default pick.

Which is healthier overall?

For most people, plain chicken is the healthier everyday staple because it’s high in protein, low in mercury, and usually easier to keep low in sodium. That doesn’t mean tuna is unhealthy. It means tuna is often best treated as a rotating protein choice rather than the only one you rely on.

Choose canned tuna more often if convenience matters most, especially if you buy lower-sodium versions and keep portions moderate. Choose chicken more often if you want the most consistent, low-risk lean protein. If you alternate between the two, you get variety without overdoing mercury from tuna.

Tips

• Pick tuna packed in water and check the sodium on the label if you eat it often.
• Use chicken breast, not breaded or heavily processed chicken, when comparing “healthiest” options.
• Rotate proteins during the week instead of relying on tuna every day.
• If you’re pregnant, breastfeeding, or feeding kids, follow mercury guidance for fish portions and frequency.
• If you track macros or train at home, Fitnit can help with form checks and rep counting while you focus on recovery and meal quality.