What canned tuna provides

Canned tuna is best known for its protein. A typical serving can deliver a large amount of protein with relatively few calories, which makes it a practical option for meals and post-workout eating. It also provides nutrients such as vitamin D, selenium, niacin, vitamin B12, and some omega-3 fats, depending on the species and packing liquid.

The exact nutrition varies by product. Tuna packed in water usually has fewer calories and less fat than tuna packed in oil. Tuna packed in oil may taste richer and can be useful in recipes, but the calorie count is usually higher. Checking the label is the best way to compare brands and styles.

Mercury and how much to eat

Mercury is the main safety issue with canned tuna. Tuna is a larger, longer-lived fish, so it can contain more mercury than many other canned seafood options. In general, canned light tuna tends to be lower in mercury than albacore tuna, which is often labeled “white tuna.”

For most healthy adults, tuna can still fit into a balanced diet if intake is moderate. The FDA and EPA advise choosing lower-mercury seafood more often, especially for pregnant people, people who are breastfeeding, and young children. If you eat tuna regularly, it is smart to rotate it with salmon, sardines, trout, shrimp, or beans to keep variety high and mercury exposure lower.

How to choose the best can

Start with the label. Look for the tuna species, whether it is packed in water or oil, the sodium amount per serving, and whether the product is flavored or heavily seasoned. Lower-sodium versions are often a better everyday choice, especially if you already eat a lot of packaged foods.

Also pay attention to the can and packaging condition. Avoid cans that are bulging, leaking, heavily dented along the seams, or rusty. Once opened, refrigerate leftover tuna in a clean container and use it within a few days. For the best quality, don’t store opened tuna in the can.

Easy, healthy ways to use canned tuna

Canned tuna is versatile, but the healthiest versions usually pair it with fiber-rich foods and minimal added sugar or heavy sauces. Try it with plain Greek yogurt, mustard, celery, and herbs for a tuna salad; mix it into whole-grain pasta with olive oil and vegetables; or serve it over beans, greens, or brown rice.

If you’re trying to support strength training or general activity, canned tuna can be an easy protein source after a workout. Fitnit can help with workout tracking at home, and for exercise consistency it may be useful to log the sets you pair with meals like tuna-based lunches or dinners. The key is still overall diet quality, not any single food.

Tips

• Choose light tuna more often if you eat tuna regularly, and save albacore for occasional use.
• Pick tuna packed in water for a lower-calorie option; choose oil-packed if you need more calories or prefer the taste.
• Watch the sodium on flavored or seasoned tuna products if you are limiting salt.
• Combine tuna with vegetables, beans, whole grains, or fruit to make the meal more balanced and filling.
• Rotate canned tuna with other seafood and protein sources to reduce mercury exposure and prevent menu boredom.