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King Oscar Royal Fillets Mackerel in Olive Oil
Photo: Open Food Facts contributors (CC BY-SA)

Mackerel fillets in olive oil

King Oscar Royal Fillets Mackerel in Olive Oil

4.05 oz

Good out of 100 Medium confidence
  • No additives
  • Seed-oil free
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Why it scores 79

King Oscar Royal Fillets Mackerel in Olive Oil scores 79 out of 100 (Good) under GoodSwap’s published rules. What moved the score most:

  1. Processed (NOVA 3): Classified NOVA 3: processed with added salt, sugar or oil. Emerging
  2. Saturated fat 5 g / 100 g: High in saturated fat. Strong
  3. Protein 20 g / 100 g: A good source of protein. Info

Capped at 79: High in fat (above the front-of-pack "high" level).

Every line of the math is on The Receipt below, with its evidence tier and sources.

Better canned salmon, sardines and other seafood

The same kind of product, at least 10 points higher, sold in the US. Never paid placements.

The Receipt

Royal Fillets Mackerel in Olive Oil

START100

Processing

  • Processed (NOVA 3)
    Emerging Classified NOVA 3: processed with added salt, sugar or oil. [1]
subtotal−8

Nutrition per 100 g

  • Saturated fat 5 g / 100 g
    Strong High in saturated fat. [2]
  • Salt 0.7 g / 100 g
    Strong High in salt. [3]
  • Energy 300 kcal / 100 g
    Info Energy-dense for its weight. [4]
  • Protein 20 g / 100 g
    Info A good source of protein. [4]
subtotal−5
TOTAL 79Good

100 − 13 = 87 → capped at 79

Capped at 79. High in fat (above the front-of-pack "high" level). [5]

GTIN 00034800600955 · 2026-07-23

score v1.3.0 · kb 2026.10.11

Medium confidence

Same product, same score. Every time.

Nutrition per 100 g

Energy300 kcal
Fat23.8 g
Saturated fat5 g
Trans fat0 g
Carbohydrates0 g
Sugars0 g
Added sugars0 g
Fiber0 g
Protein20 g
Salt0.7 g

Serving: 1 can drained (80 g)

Ingredients

High Moderate Not recognized Tap an ingredient for its evidence and rules.
Label text, as published

SKINLESS AND BONELESS NORTH ATLANTIC MACKEREL, OLIVE OIL, SALT

Allergens and diets

Contains: Fish

  • Not vegan
  • Not vegetarian
  • Gluten-free
  • Palm-oil-free

Always check the package: recipes change.

More from King Oscar

Sources

  1. Ultra-processed foods: what they are and how to identify them

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  2. Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline

    World Health Organization · Jul 17, 2023 · Agency assessment

    “WHO recommends that adults and children reduce saturated fatty acid intake to 10% of total energy intake (strong recommendation).”

    who.int

  3. Sodium reduction (fact sheet)

    World Health Organization · May 11, 2026 · Agency assessment

    “For adults, WHO recommends less than 2000 mg/day of sodium (equivalent to less than 5 g/day salt), or just under a teaspoon.”

    who.int

  4. Dietary Guidelines for Americans, 2025–2030

    U.S. Department of Health and Human Services and U.S. Department of Agriculture · January 2026 · Regulator

    “Limit foods and beverages that include artificial flavors, petroleum-based dyes, artificial preservatives, and low-calorie non-nutritive sweeteners.”

    cdn.realfood.gov

  5. Guide to creating a front of pack (FoP) nutrition label for pre-packed products sold through retail outlets

    Department of Health and Social Care / Food Standards Agency (GOV.UK) · Nov 8, 2016 · Regulator

    “Table 3: Criteria for drinks (per 100ml)”

    assets.publishing.service.gov.uk