Is shrimp high in histamine?
Fresh shrimp is low in histamine on the evidence we have: seafood had none in lab tests. But only 7 samples were measured, and some published diets exclude all seafood.
- Histamine
- Not detected
- Other amines
- Low
- Liberator
- Claimed, unproven
- DAO blocker
- No evidence
Why sources disagree. Seafood had no detectable histamine in lab tests, but only seven samples were measured, and three of ten published diets plus a 2024 clinical review exclude seafood.
What each source says
| Source | Verdict | What it says, in our words |
|---|---|---|
| Lab measurements, Spain 1 | Measured | No detectable histamine in 7 seafood samples; other amines low. Shrimp was not reported separately. |
| 10 published low-histamine diets 1 | 3 of 10 exclude seafood. | |
| Clinical review, 2024 2 | Lists seafood among foods a low-histamine diet avoids. | |
| SIGHI food list 3 | See source | See SIGHI's own list for its rating. |
Measured histamine
| Food tested | Samples | Histamine | Other amines |
|---|---|---|---|
| Seafood sold in Spain (shellfish group; species not given) 1 (Table 1) | 7 | not detected | putrescine mean 3.02 mg/kg (1.44–9.79); tyramine mean 0.15 mg/kg; cadaverine not detected |
mg/kg = milligrams of histamine per kilogram of food. "Not detected" means below the laboratory's detection limit.
How freshness and processing change it
Shellfish spoils quickly, and amines form as bacteria grow during storage; cooking does not remove them. Frozen raw shrimp cooked straight from the freezer, or fresh shrimp cooked the day you buy it, is the safest choice. Ready-cooked, peeled shrimp and leftovers were not measured.
Seafood had no detectable histamine (7 samples). (measured)
Not measured; you do not know how long it was kept chilled. (estimate)
Not measured. Storage time adds histamine, and reheating does not remove it. (estimate)
Why we rate shrimp 0
Shrimp is a case where the measurements are reassuring but thin. In the University of Barcelona team's survey of foods sold in Spain, seafood (shellfish, reported as one group) had no detectable histamine in any of the seven samples tested. Other amines were low too: putrescine averaged 3.02 mg/kg and tyramine 0.15 mg/kg, with no cadaverine. The paper does not say which species were in the group, so we cannot tell you how many of the seven were shrimp.
Seven samples is a small number, and that matters for seafood more than for most foods. Histamine in fish and shellfish is made by bacteria during storage, so a single badly kept batch can look very different from a fresh one. The fish figures from the same team show this: fresh white fish had no histamine in 95% of samples but one reached 36.55 mg/kg. A survey of seven shellfish samples is too small to catch an occasional high one, if it exists.
The published diets are split. Three of the ten low-histamine diets in the team's 2021 review exclude seafood, and a 2024 clinical review lists seafood first among the foods a low-histamine diet avoids. The other seven diets in the 2021 review do not exclude it.
We rate fresh shrimp 0, "low", because that is what was measured, and we mark it disputed because the sample is small and the lists disagree. Buying and storage decide most of the risk. Frozen raw shrimp cooked straight from the freezer, or fresh shrimp cooked the day you buy it, is the closest match to what was measured. Ready-cooked shrimp from a deli counter and leftovers have had more time for amines to form, so we rate them higher as estimates. Shellfish allergy is a separate condition from histamine intolerance and is not covered by this rating.
Questions about shrimp and histamine
Are prawns and shrimp the same for histamine?
The studies we use report shellfish as one group, so we cannot separate them. Treat both the same: buy them fresh or frozen and cook them soon.
Is frozen shrimp better than fresh?
Freezing stops the bacterial growth that makes histamine, so frozen raw shrimp cooked straight from the freezer avoids the storage time that fresh shrimp may have had. Neither was measured separately.
Evidence behind this page
Sources
- Sánchez-Pérez S, Comas-Basté O, Veciana-Nogués MT, Latorre-Moratalla ML, Vidal-Carou MC. Low-Histamine Diets: Is the Exclusion of Foods Justified by Their Histamine Content? Nutrients 13(5):1395, 2021. doi:10.3390/nu13051395 (Sánchez-Pérez S et al. 2021)
- Jochum C. Histamine Intolerance: Symptoms, Diagnosis, and Beyond. Nutrients 16(8):1219, 2024. doi:10.3390/nu16081219 (Jochum C 2024)
- Swiss Interest Group Histamine Intolerance (SIGHI). Food compatibility list for histamine intolerance. histaminintoleranz.ch (accessed November 2026), 2026. Link (Swiss Interest Group Histamine Intolerance (SIGHI) 2026)