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Fish

What the research shows

Prototype

Not enough

published research on this page yet

1 health finding on this page so far · See the findings

An animal that lives in water and is eaten as food.

It is eaten as a source of protein and other nutrients.

Written from Open Food Facts and English Wikipedia12

  • Not vegan
  • Not vegetarian

What research says

Studies in people

  • Concern

    Mercury in young children3

    In children, eating any fish was linked to higher mercury levels in their toenails than eating none.

Study type not stated

  • Concern

    Oily rectal leakage4

    Eating certain fish like escolar and oilfish can cause oily orange leakage from the rectum, plus nausea and cramps.

  • Concern

    Heavy metals in seafood5

    Some fish from the Persian Gulf had high levels of nickel and lead, which scientists say may be a health concern.

The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least two findings in people. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.

Products

The 6 most-scanned of 7,688 products on Open Food Facts that list fish.

  • Sardines Huile d'Olive Vierge Extra PARMENTIER · 135 g (95 g égoutté) 0 additives
  • Sardines à la tomate Parmentier · 135 g 0 additives
  • Truite Fumée des Pyrénées Ovive · 120 g e (4 tranches) 0 additives
  • Sardines huile d'olives et piment Parmentier · 135 g 0 additives
  • Sardines à l'huile d'olive et herbes de Provence Parmentier · 135 g 0 additives
  • OMEGA 3 BREADED ALASKA POLLOCK FISH FINGERS Birds Eye · 280 g 0 additives

References

  1. 1fish: ingredient taxonomy entry. Open Food Facts.
  2. 2Fish as food. Wikipedia. Accessed September 26, 2026.
  3. 3Notario Barandiaran L, Bauer JA, Jackson BP, Karagas MR. Fish intake and mercury exposure in young children. Environ Res. 2024;257:119277. doi:10.1016/j.envres.2024.119277
  4. 4Ling KH, Nichols PD, But PP. Fish-induced keriorrhea. Adv Food Nutr Res. 2009;57:1-52. doi:10.1016/S1043-4526(09)57001-5
  5. 5Torabi S, Gholizadeh M, Yazarlo M, Riahi Z. Health Risk Assessment of Heavy Metals in Marine Fish Caught from the Northwest Persian Gulf. Biol Trace Elem Res. 2024;202(8):3789-3799. doi:10.1007/s12011-023-03946-z