Fresh oily fish: histamine content (0.33 mg/100 g)

0.33 mg/100 g

Reported range 0.33–11.13 mg per 100 g. Concentrations vary with ripeness, storage and processing, so a single figure would be misleading.

By portion

Portion	Grams	Histamine
1 fillet	140 g	0.46 mg
1 serving	100 g	0.33 mg

Source

“Fresh oily fish: mean 3.27 mg/kg, maximum 111.26 mg/kg”

Low-Histamine Diets: Is the Exclusion of Foods Justified by Their Histamine Content? (Nutrients 2021;13(5):1395) · 2021 · CC BY 4.0

Food composition data, not medical advice. Reported tolerance thresholds vary widely between individuals, so a value being high here does not mean you will react to it.