Canned tuna in water earns a FoodScore of 61/100, placing it in the 'Good' category. The primary driver for its positive score is its exceptionally high protein content, providing 28.8 grams per 100g, which contributes a significant bonus. It also receives a bonus for key micronutrients like Vitamin D and Vitamin B12, with 100g supplying 15% and 125% of the Daily Value respectively, along with a good amount of phosphorus. However, the score is moderately penalized because it is classified as a NOVA 3 food, meaning it is a processed culinary ingredient. While its fat content is low, with only 0.2g of saturated fat per 100g, and it contains no added sugar, the processing classification slightly reduces its overall score. To achieve a higher score, tuna would ideally be less processed, but for a convenient protein source, its nutritional profile remains strong.
Health benefits
What the nutrients in tuna (canned in water, drained) actually do for you, grounded in established dietary science.
Supports Muscle Maintenance and Growth
Tuna is an excellent source of high-quality protein, essential for muscle repair, growth, and overall body function. Each 100g serving provides 28.8 grams of protein, which is a substantial portion of the daily recommended intake for most adults. Adequate protein intake is crucial for athletes and active individuals for post-exercise recovery, and for older adults to help prevent age-related muscle loss. Including tuna in your diet can help meet protein targets without adding excessive calories or saturated fat, making it a valuable component of a balanced eating plan.
Contributes to Brain and Nerve Health
Canned tuna is remarkably rich in Vitamin B12, a nutrient vital for neurological function and red blood cell formation. A 100g serving delivers 125% of the Daily Value for Vitamin B12, making it an easy way to meet your needs. This vitamin plays a key role in the synthesis of neurotransmitters and the maintenance of the myelin sheath, which protects nerve fibers. Regular intake of Vitamin B12 through foods like tuna can help support cognitive function and energy levels, as deficiencies can lead to fatigue and neurological issues.
Promotes Bone Health
Tuna provides a notable amount of Vitamin D, a crucial nutrient for bone health. A 100g serving supplies 15% of the Daily Value for Vitamin D. This vitamin is essential for the body's absorption of calcium and phosphorus, both of which are fundamental building blocks of bones and teeth. While sunlight is a primary source of Vitamin D, dietary sources like tuna are important, especially for those with limited sun exposure. Adequate Vitamin D intake, alongside other minerals, helps maintain bone density and reduce the risk of osteoporosis.
Supports Heart Health
Tuna contains omega-3 fatty acids, specifically 0.3g per 100g, which are recognized for their benefits to cardiovascular health. Dietary guidelines emphasize the importance of consuming omega-3s, as they can help reduce inflammation and support healthy blood lipid levels. Additionally, tuna is very low in total fat, with only 0.8g per 100g, and has a minimal amount of saturated fat (0.2g). This favorable fat profile, combined with omega-3s, makes tuna a heart-healthy protein choice when consumed as part of a balanced diet.
Canned tuna in water scores a good 61/100, primarily driven by its high protein content and essential micronutrients, despite being a processed food.
How to eat it
Canned tuna in water is a versatile and convenient protein source in the American diet, often used in quick meals and snacks. It's typically consumed straight from the can, mixed into salads, or used as a sandwich filling. Its mild flavor and firm texture make it adaptable to various recipes. A standard serving size is 3 ounces, which is roughly half a can.
Drain tuna thoroughly to reduce sodium content and improve texture, especially if using it in salads or casseroles.
Combine tuna with healthy fats like avocado or olive oil instead of mayonnaise for a nutrient-dense meal.
Use canned tuna as a quick protein boost in pasta dishes, wraps, or mixed with whole grains for a balanced lunch.
Store unopened cans in a cool, dry place; once opened, refrigerate any unused portion in an airtight container and consume within two days.
Things to keep in mind
For most healthy adults, canned tuna in water is safe to consume in moderation. The primary concern with tuna is its mercury content, which can accumulate in the body over time. While canned light tuna generally has lower mercury levels than albacore, pregnant women, breastfeeding mothers, and young children should consult health guidelines for specific recommendations on frequency and portion sizes to minimize exposure. There are no widely documented common allergies or significant gastrointestinal issues associated with tuna at normal serving sizes.
Yes, canned tuna in water is generally considered healthy. It's an excellent source of lean protein (28.8g per 100g) and provides essential nutrients like Vitamin B12 (125% DV) and Vitamin D (15% DV). While it is a processed food (NOVA 3), its nutritional benefits outweigh this classification for many individuals, especially as a convenient option.
Is canned tuna good for weight loss?
Canned tuna can be a good food for weight loss due to its high protein content and low calorie density (128 calories per 100g). Protein helps promote satiety, which can reduce overall calorie intake. Its low fat and zero added sugar content also make it a suitable choice for managing weight when incorporated into a balanced, calorie-controlled diet.
Is canned tuna considered ultra-processed?
Canned tuna in water is classified as a NOVA 3 food, meaning it is a processed culinary ingredient. It is not considered ultra-processed (NOVA 4), which typically involves multiple industrial ingredients and additives. While it undergoes processing for canning, it retains much of its original nutritional integrity.
How should I prepare canned tuna for the best nutritional benefits?
For the best nutritional benefits, prepare canned tuna with minimal added fats or high-sodium ingredients. Consider mixing it with mashed avocado, olive oil, lemon juice, and fresh herbs instead of mayonnaise. Pairing it with whole grains and plenty of vegetables can create a nutrient-dense and balanced meal.
What are some good alternatives to canned tuna?
Good alternatives to canned tuna that offer similar nutritional benefits include other canned fish like sardines or mackerel, which are also rich in omega-3s and protein. For non-fish options, cooked chicken breast, chickpeas, or lentils can provide comparable lean protein sources for salads and sandwiches.
Does canned tuna contain omega-3 fatty acids?
Yes, canned tuna in water does contain omega-3 fatty acids. A 100g serving provides 0.3g of omega-3s. While not as high as some other fatty fish, this contribution can still support heart health and overall well-being as part of a varied diet.
How much sodium is in canned tuna?
Canned tuna in water contains 321mg of sodium per 100g. This is a moderate amount for a canned product, and it's important to consider your overall daily sodium intake. Draining the tuna can help reduce some of the sodium content, and choosing low-sodium varieties is an option if available.