Seniors: 4 Types of Fish to Limit and 4 Heart-Healthy Fish to Enjoy More Often
Seniors: 4 Types of Fish to Limit and 4 Heart-Healthy Fish to Enjoy More Often
Fish is one of the healthiest sources of protein available. Rich in high-quality protein, vitamins, minerals, and heart-healthy omega-3 fatty acids, fish has been linked to a lower risk of cardiovascular disease when included as part of a balanced diet.
For adults over 60, eating fish regularly may support heart health, brain function, eye health, and muscle maintenance. However, not all fish are equal. Some species contain higher levels of mercury or other environmental contaminants, while others provide exceptional nutritional benefits with relatively low contaminant levels.
It’s important to note that there are very few fish that healthy adults should “never” eat. Instead, experts generally recommend limiting certain high-mercury fish and choosing a variety of lower-mercury seafood.
Here are four types of fish older adults should eat less often—and four excellent choices to include regularly.
4 Fish to Limit
1. King Mackerel
King mackerel is one of the highest-mercury fish commonly available.
Mercury can accumulate in larger, longer-lived predatory fish because they eat many smaller fish over their lifetime.
High mercury exposure may affect the nervous system, particularly in developing children and during pregnancy, but minimizing unnecessary exposure is also reasonable for older adults.
Instead, choose Atlantic mackerel, which is much lower in mercury and rich in omega-3 fats.
.
.
.
2. Shark
Sharks grow slowly and live for many years, allowing mercury to build up in their tissues.
Because of this, health authorities recommend limiting or avoiding shark meat in routine diets.
3. Swordfish
Swordfish is another large predatory fish known for relatively high mercury levels.
While an occasional serving is unlikely to harm most healthy adults, it should not be a frequent choice.
Lower-mercury fish provide similar nutritional benefits with less concern about mercury exposure.
4. Tilefish (from the Gulf of Mexico)
Certain species of tilefish—particularly those from the Gulf of Mexico—contain relatively high mercury levels.
Other regional tilefish species may differ, but many public health recommendations advise limiting Gulf tilefish.
4 Fish to Enjoy More Often
1. Salmon
Salmon is one of the most nutritious fish available.
It provides:
Omega-3 fatty acids (EPA and DHA)
High-quality protein
Vitamin D
Vitamin B12
Selenium
Regular consumption of salmon has been associated with better heart health and may support healthy brain aging as part of an overall balanced diet.
Both wild and responsibly farmed salmon can be healthy choices.
2. Sardines
Sardines are nutritional powerhouses.
They are naturally rich in:
Omega-3 fats
Calcium (when the soft bones are eaten)
Vitamin D
Protein
Because sardines are small and low on the food chain, they generally contain much less mercury than larger predatory fish.
3. Trout
Rainbow trout is another excellent option.
It provides:
Lean protein
Omega-3 fatty acids
Vitamin D
Potassium
Selenium
Farm-raised rainbow trout in the United States is generally considered a low-mercury seafood choice.
4. Herring
Herring is widely consumed in many parts of the world and is naturally high in omega-3 fatty acids.
It also provides:
Vitamin D
Vitamin B12
Selenium
Protein
Fresh or lightly preserved varieties are generally healthier than heavily salted products, especially for people with high blood pressure.
Why Fish Is Especially Beneficial After 60
As we age, maintaining muscle mass, heart health, and cognitive function becomes increasingly important.
Fish provides nutrients that support healthy aging, including:
High-Quality Protein
Protein helps preserve muscle strength and supports recovery from illness or injury.
Omega-3 Fatty Acids
EPA and DHA are associated with:
Heart health
Reduced triglyceride levels
Healthy brain function
Eye health
Omega-3 supplements may be appropriate for some people, but they should not replace a balanced diet unless recommended by a healthcare provider.
Vitamin D
Many older adults have low vitamin D levels.
Fatty fish is one of the few natural food sources of this important vitamin.
How Much Fish Should Older Adults Eat?
For most adults, health organizations recommend eating at least two servings (about 8 ounces total) of fish per week, especially oily fish rich in omega-3 fatty acids.
Despite popular claims online, there is no recommendation for most people to eat fish every day. Variety is encouraged to obtain a broad range of nutrients while limiting exposure to contaminants.
Tips for Choosing Healthier Seafood
To get the most benefit:
Choose baked, grilled, steamed, or broiled fish instead of deep-fried fish.
Eat a variety of seafood rather than relying on one type.
Remove breading and heavy sauces when possible.
Select reputable sources that follow food safety standards.
Refrigerate seafood promptly and cook it thoroughly when appropriate.
Who Should Talk to Their Doctor Before Changing Their Diet?
Consult your healthcare provider or a registered dietitian if you have:
Chronic kidney disease
Severe food allergies
Heart failure requiring sodium restriction
Difficulty chewing or swallowing
Questions about fish oil supplements
Concerns about interactions with medications such as blood thinners
They can help tailor dietary recommendations to your individual health needs.
The Bottom Line
Fish can be one of the healthiest foods for adults over 60, providing high-quality protein, omega-3 fatty acids, vitamin D, and other nutrients that support healthy aging. Rather than avoiding seafood altogether, experts recommend limiting high-mercury fish such as king mackerel, shark, swordfish, and Gulf of Mexico tilefish, while choosing lower-mercury options like salmon, sardines, trout, and herring more often.
The healthiest approach is to enjoy a variety of seafood as part of a balanced diet, prepare it using heart-healthy cooking methods, and aim for about two servings of fish per week, unless your healthcare provider recommends otherwise.