The Seafood Nutrition Guide (Fish & Shellfish)
King mackerel, wild
FDA/EPA Choice to avoid (listed as “King mackerel”) in the FDA/EPA Advice about Eating Fish (revised October 2021). How much and how often is their advice, not ours.
Composition per 100 g as eaten — cooked, or canned and drained. Mercury is FDA’s species mean, as FDA publishes it; for species FDA does not cover, the sample-weighted mean of the surveys listed. Dioxins + PCBs are survey means (or a median, where noted) per gram of fish as sold, in each survey’s own TEQ scheme. Tagged wild: this species is caught, not farmed, for the US market, and NOAA Fisheries describes the US catch as wild-caught.
EPA + DHA(g/100g)
USDA FoodData Central SR Legacy — Fish, mackerel, king, cooked, dry heat (FDC 174236) (2019)
Omega-6 (LA)(g/100g)
EPA + DHA : LA 7.9 : 1 display only, not scored. Why
USDA FoodData Central SR Legacy — Fish, mackerel, king, cooked, dry heat (FDC 174236) (2019)
Mercury(ppm)
High mercury — an FDA/EPA Choice to avoid.
FDA — Mercury Levels in Commercial Fish and Shellfish (1990–2012): Mackerel king, mean of 213 samples (Gulf of Mexico report 2000) (2000)
Dioxins + PCBs(pg TEQ/g)
Not tested
Not tested — no survey we cite covers this species. Lifestyle lists score it at the 75th percentile of tested rows (1.27 pg TEQ/g): untested is not treated as clean.
Protein(g/100g)
USDA FoodData Central SR Legacy — Fish, mackerel, king, cooked, dry heat (FDC 174236) (2019)
Energy(kcal/100g)
USDA FoodData Central SR Legacy — Fish, mackerel, king, cooked, dry heat (FDC 174236) (2019)
Saturated(g/100g)
USDA FoodData Central SR Legacy — Fish, mackerel, king, cooked, dry heat (FDC 174236) (2019)
Sodium(mg/100g)
USDA FoodData Central SR Legacy — Fish, mackerel, king, cooked, dry heat (FDC 174236) (2019)
An empty cell means we do not yet have a method-cited source. Rank 1 wins the published rule; it is not medical advice.