Choosing tuna packed in oil or water can affect a meal’s flavor and texture, as well as how well the fish works with other ingredients. The liquid in the can does more than preserve the tuna: it helps shape how the fish tastes and feels in a dish. Neither option is automatically healthier. The better choice depends on the recipe, portion size, and overall diet.
Tuna in water has a lighter, more neutral taste and a firmer bite. It’s a reliable choice when the fish is one element among many, especially alongside creamy ingredients such as mayonnaise or yogurt, with cheese as another option. Its subtle flavor leaves room for the rest of the dish, and its firmness works well in mixes and fillings. Registered dietitian Lisa Young, quoted by AARP, says water-packed fish “usually has fewer calories.”
Oil vs. Water: What Changes?
Tuna in oil has a richer flavor and a noticeably juicier texture. The oil adds richness and can make the fish stand out in simple preparations. Young notes that oil-packed fish “has a richer texture and provides extra calories.” Food publications such as Simply Recipes also describe oil as adding taste and mouthfeel, while water keeps a dish lighter and more flexible.
The choice depends on how you plan to use the tuna. If a recipe already includes fats or creamy sauces, as in tuna salad with mayonnaise or sandwich spreads, tuna in water is usually the better fit. Stuffed eggs are another example. Water-packed tuna lets you control the richness and keeps the dish from feeling heavy.
When to Choose Tuna in Water
Water-packed tuna works well in dishes where it’s mixed with other flavorful or creamy ingredients, including salads and wraps, as well as empanadas and fillings for vegetables or eggs. Its subtle taste lets other flavors shine, while its firmness helps it hold up when combined with sauces or dressings.
Pair it with lemon or herbs, or use mustard or yogurt, for a fresh, balanced result. Tuna in oil can make these mixtures richer, especially when the recipe already includes another source of fat. Draining the oil removes some of that added richness, but it does not make the tuna nutritionally equivalent to a water-packed product.
When to Pick Tuna in Oil
When the tuna is meant to be the star, whether on toast or tossed with pasta, oil-packed tuna is often the better choice. It also works well atop a fresh salad. Its flavor is more pronounced, and its richer texture can add moisture and body without requiring an additional sauce.
In pasta dishes, some of the oil from the can can coat the noodles and bring the ingredients together. On toast or bruschetta, it helps keep the tuna from tasting dry. In salads with potatoes or beans, it adds richness and carries flavor through the dish. Tomatoes work well here, too.
Serious Eats notes that the oil from the can can add flavor to bread and legumes or serve as a finishing drizzle. But cans vary in taste and texture, and saltiness and nutrition differ as well. Epicurious has highlighted those differences in its taste tests, so the label is the best guide to a particular product.
Making the Right Choice
There’s no universal answer: the best choice depends on the recipe. For creamy mixes and fillings, reach for tuna in water. For dishes where the fish takes center stage, oil-packed tuna brings more richness and juiciness. Those qualities can elevate even a simple meal.
Tuna in water is typically lower in calories and fat, while tuna in oil has a richer taste and contains additional fat and calories. Both remain protein-rich. Registered dietitian Angel Planells, a spokesperson for the Academy of Nutrition and Dietetics, says a typical 3-ounce serving of canned fish provides about 20 grams of protein. Exact figures vary by species and brand, as well as drained serving size, salt content, and how much packing liquid remains. Check the nutrition panel when comparing cans.
The packing liquid is not the basic factor in tuna’s mercury content. The U.S. Food and Drug Administration lists canned light tuna among its lower-mercury “Best Choices,” while albacore, also called white tuna, generally contains more mercury. AARP reports that canned light tuna generally has about one-third as much mercury as canned albacore. This difference relates to the species, not whether the tuna is packed in oil or water. FDA guidance also gives specific fish-consumption advice for people who are pregnant or may become pregnant, as well as those who are breastfeeding and children. As nutrition expert José Ordovás has noted, “Draining or cooking fish does not remove its mercury.”
When choosing a can, consider how you’ll use it, then check its species and nutrition panel. The right tuna can make a salad or pasta more memorable. Toast is another good fit.
