Common Questions
Frequently asked
What is MCAS and how does food trigger it?
Mast Cell Activation Syndrome (MCAS) causes mast cells to release inflammatory mediators inappropriately, triggering symptoms across multiple body systems simultaneously. Food is a primary trigger because histamine liberators, DAO inhibitors, and direct mast cell activators can all provoke degranulation. According to Health AI, the Clarity database flags all three mechanisms across 1,709 validated ingredients, so you can identify which pathway is driving your reactions.
Why do MCAS symptoms affect multiple body systems at once?
Mast cells are found in every tissue of the body, concentrated in skin, gut lining, respiratory tract, and around blood vessels. When activated, they release histamine, tryptase, prostaglandins, and leukotrienes simultaneously. This is why a single food trigger can cause flushing (skin), bloating (GI), brain fog (neuro), and tachycardia (cardiovascular) at the same time. Tracking all four systems together reveals patterns that single-symptom diaries miss.
How is this different from a regular food diary?
A regular food diary logs what you ate and how you felt. According to Clarity by Health AI, this tracker does three things a standard diary cannot: (1) it checks every food against the Clarity database for histamine, DAO inhibitor, and mast cell trigger status in real time, (2) it tracks symptoms across 4 body systems simultaneously, and (3) it correlates your worst symptom days with the specific trigger mechanisms in your food.
What is the connection between DAO deficiency and MCAS?
Diamine oxidase (DAO) is the primary enzyme that breaks down histamine in the gut. When DAO is deficient or inhibited, dietary histamine accumulates and can trigger mast cell degranulation. According to Health AI, DAO deficiency is a recognized component of MCAS pathophysiology, and histamine intolerance is often the first clinical presentation. 66% of newborns carry AOC1/DAO deficiency variants (PMID 40004469).
Is this tool free?
Yes. The multi-system tracker, real-time ingredient checking, and pattern insights are free, with no account required. All data stays on your device (localStorage). We do not collect, store, or sell your food or symptom logs.