Fish is one of the most valuable foods in your diet — but not all fish are created equal. Here’s what’s worth putting in your cart and what’s better left on the shelf.
Why Fish Is Good for You
Fish is an excellent source of complete protein, the amino acid taurine, iodine, and selenium. Fatty marine varieties contain Omega-3 fatty acids (EPA and DHA), which support cardiovascular health, brain function, skin, and hair.
On the intelligence question: research does show a link between Omega-3 intake and improved memory and concentration. But claiming fish directly raises IQ is a stretch — science hasn’t confirmed that direct causal relationship. Omega-3 supports brain health, and that’s reason enough to include fatty fish in your diet.
Fish to Eat Less Often
Large predatory fish — tuna, swordfish, Atlantic halibut — accumulate heavy metals and mercury. That’s the nature of apex predators: they absorb contaminants from everything they eat over their long lives. Tuna in moderate amounts isn’t acutely dangerous, but pregnant women and children should limit intake — a recommendation backed by the WHO and national health authorities.
Tilapia and pangasius are not inherently harmful and contain decent protein (up to 19 g per 100 g). The issue is how they’re raised. Pangasius is farmed primarily in the Mekong River (Vietnam), considered one of the world’s most polluted waterways. Tilapia is often raised in dense artificial ponds where antibiotics and growth stimulants are used. The result: risk of chemical and toxin residues in the flesh. Not “poison,” but quality varies enormously by producer.
Carp is frequently infected with parasites. Always cook thoroughly.
On canned fish: choose varieties packed in their own juice, not oil — oil-packed products contain oxidized fats and unnecessary extra calories.
Fish Worth Eating
High price does not equal high quality. Reliable choices include:
Medium and small-sized sea fish: pollock, cod, hake, sea bass, dorado, pike-perch, catfish, pike — good protein sources with relatively low toxin accumulation risk.
Wild Pacific salmon — sockeye, coho, chum, pink — are richest in Omega-3. When choosing a whole fish, check the scales: they should be uniformly silver. Discolored scales mean the fish has already spawned, its tissues are breaking down, and nutritional value is minimal.
Farmed salmon and trout — if your choice is between farmed fish raised on quality feed versus wild fish from a polluted water body, go farmed.
Best Fish for the Money
Here’s the real discovery: the most affordable and nutritious fish in our region are mackerel and herring. Small fish, rich in Omega-3 and protein, with little time to accumulate harmful substances. An excellent choice for regular consumption.
Don’t overlook sardines and anchovies — tiny fish with exceptional calcium content.
How to Choose Fish at the Store
- Younger and smaller fish = lower toxin accumulation risk.
- Over 90% of fish on shelves has been previously frozen. Fresh (never-frozen) is rare — exceptions: sea bass, dorado, locally farmed trout.
- For wild red fish: look for uniformly silver scales and solid red flesh without blood streaks.
- Canned roe: check protein content per 100 g — should be at least 28 g. Anything below 15 g is suspicious.
- Cod liver is an exceptional source of vitamin A, but fat content reaches 60 g per 100 g. Choose varieties packed in their own juice from Icelandic waters.