SUPPLEMENT SCIENCEInsights
Search

Search Insights

Try choline, nano-curcumin or probiotics.

    Ingredient guide · Ingredient reference

    Mackerel species matter for both omega-3 comparisons and mercury advice

    Cooked Atlantic mackerel supplies substantial EPA and DHA in the NIH food table. It should not be confused with king mackerel, which has a different mercury category in FDA/EPA advice.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    Use the Atlantic mackerel entry precisely

    NIH ODS lists 0.59 grams DHA and 0.43 grams EPA per three ounces of cooked Atlantic mackerel. Together that is 1.02 grams, or 1,020 milligrams, of EPA plus DHA. [1]

    The entry is not a composition guarantee for every species sold as mackerel. It also describes cooked fish, so compare portions and preparation before comparing values. [1]

    A family name is too broad for mercury advice

    FDA/EPA places Atlantic mackerel and Pacific chub mackerel in Best Choices, Spanish mackerel in Good Choices, and king mackerel in Choices to Avoid. The advice is especially relevant to people who may become pregnant, are pregnant or breastfeeding, and children. [2]

    An omega-3-rich food can still require species-specific mercury consideration. Neither the amount of fish oil nor the broad word mackerel cancels the need to identify the fish. [2]

    Resolve an incomplete name

    Imagine a menu says only mackerel. Before applying the Atlantic mackerel nutrition estimate or its mercury category, identify which species the menu means.

    Key distinctions — Mackerel species matter for both omega-3 comparisons and mercury advice
    DetailInterpretation
    Atlantic mackerel, three cooked ounces1,020 mg EPA plus DHA
    Spanish mackerelDifferent mercury category
    King mackerelChoices to Avoid
    Mackerel species matter for both omega-3 comparisons and mercury advice — original article outline diagram
    Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

    Sources for this article

    1. Omega-3 Fatty Acids - Health Professional Fact Sheet
      Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.
    2. Advice about Eating Fish | FDA
      Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.