Check the histamine load of what you ate

Tick the foods you've eaten. We estimate your meal's relative histamine pressure using the SIGHI 0–3 tolerance scale — the standard reference used in low-histamine diets. Free, private, runs entirely in your browser.

Pick the foods on your plate

Scores reflect SIGHI tolerance ratings (0 = well tolerated, 3 = very poorly tolerated), not measured milligrams. Individual tolerance varies.

⏱️ Freshness rule: histamine rises as food ages. Fresh or flash-frozen meats, just-caught or quickly thawed fish, and meals eaten promptly are far safer than leftovers or restaurant/prepared dishes. When in doubt, cook fresh and freeze extras immediately.

🔎 Starter list: this covers ~40 of SIGHI's 300+ foods. If a food isn't listed, treat unknown aged, fermented, or leftover items as higher risk until you learn your own response.