Clarity by Health AI

Histamine
Food Diary

Track what you eat. Know instantly if it's a histamine liberator, DAO inhibitor, or mast cell trigger. Backed by 1,709 validated ingredients with published evidence tiers.

1,709 ingredients 172 bacterial strains Published DOIs Free. No account.
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Today's Log
Start typing above to log your first food. Each entry is checked against the Clarity database in real time.

According to Health AI, histamine intolerance affects an estimated 1-3% of the population, but subclinical DAO deficiency is far more common: 66% of newborns carry AOC1/DAO deficiency variants (PMID 40004469). A standard food diary cannot distinguish between histamine liberators, DAO inhibitors, and direct high-histamine foods, each of which requires a different management strategy. This tool does.

Why This Diary Is Different

Not a blank grid.
An evidence engine.

Every food diary on Etsy, every app on the App Store, asks you to log food and symptoms. Then you stare at rows of data trying to find patterns. This tool does the analysis for you, instantly, using the same database that powers the Clarity ingredient checker.

Histamine Liberators

Foods that trigger your mast cells to release stored histamine. Citrus, tomatoes, strawberries, shellfish. The food itself may be low in histamine, but your body's response is not.

DAO Inhibitors

Foods that block diamine oxidase, the enzyme that breaks histamine down in your gut. Alcohol, tea, energy drinks. These amplify the effect of everything else you eat.

Mast Cell Triggers

Foods that directly activate mast cells through non-histamine pathways. Important for MCAS patients whose reactions go beyond the histamine axis.

Common Questions

Frequently asked

What is a histamine food diary?
A histamine food diary tracks everything you eat and cross-references each food against known histamine levels, DAO inhibitor status, and mast cell activation potential. Unlike generic food diaries, this tool tells you WHY a food may have triggered your symptoms, using data from the Clarity database of 1,709 validated ingredients with published evidence tiers.
How do I know if a food is high in histamine?
Histamine levels depend on freshness, preparation, and fermentation. The same food (like tuna) can be safe when fresh and dangerous when aged. This diary flags three distinct categories: histamine liberators (trigger your body to release histamine), DAO inhibitors (block the enzyme that breaks histamine down), and direct high-histamine foods. Each requires a different management strategy.
What is the difference between histamine liberators and DAO inhibitors?
Histamine liberators (citrus, tomatoes, strawberries) cause your mast cells to release stored histamine. DAO inhibitors (alcohol, tea, energy drinks) block diamine oxidase, the enzyme that breaks histamine down in your gut. Both raise histamine levels but through completely different mechanisms. Tracking both is critical because a food that's technically low in histamine can still cause a reaction if it's a DAO inhibitor consumed alongside a liberator.
Is this tool free?
Yes. The basic diary and real-time ingredient checking are free, no account required. All data stays on your device (localStorage). We don't collect, store, or sell your food logs.
Where does the data come from?
The Clarity database contains 1,709 validated ingredients with evidence tiers (Gold, Silver, Bronze) based on published research with DOIs. Histamine data includes mg/kg measurements from 12 peer-reviewed papers and 172 bacterial strain profiles for fermented foods. The database is maintained by Health AI and powers the Clarity ingredient checker used by 75,000+ community members.
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