Tuna in ice: histamine content (1.75 mg/100 g)

1.75 mg/100 g

Reported range 1.75–3.84 mg per 100 g. Concentrations vary with ripeness, storage and processing, so a single figure would be misleading.

By portion

PortionGramsHistamine
1 serving100 g1.75 mg

Source

“Tuna in ice, Thunnus spp. — mean 17.5 mg/kg (n=3); Olivo (2013)”
Histamine in Brazilian Foods: A Comprehensive Review of Occurrence and Risk Assessment for Intoxication and Intolerance (Food Science & Nutrition 2025;13:e71151) · 2025 · 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.