Sushi: histamine content (0.35 mg/100 g)

0.35 mg/100 g

Reported range 0.06–0.64 mg per 100 g. Concentrations vary with ripeness, storage and processing, so a single figure would be misleading.

By portion

PortionGramsHistamine
1 serving100 g0.35 mg

Source

“Sushi, tuna — mean 6.39 mg/kg (n=3); Vitali et al. (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
“Sushi, salmon — mean 0.6 mg/kg (n=18); Rodrigues et al. (2012)”
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.