Allicin — answers to garlic compound
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Allicin is the sulfur compound produced when raw garlic is crushed or chewed, as an enzyme called alliinase converts a stable precursor (alliin) into allicin. It is unstable and breaks down quickly, so supplements typically supply garlic powder or extract standardized to allicin potential rather than pure allicin itself.
Why it’s used
Taken to support cardiovascular health, including cholesterol and blood pressure, largely on the strength of garlic research generally.
What the evidence says
Most clinical research concerns garlic supplements as a whole rather than isolated allicin, and results on cholesterol and blood pressure are mixed and modest at best. There is no dedicated NIH ODS fact sheet for allicin specifically, and the compound's instability makes it hard to standardize or study in isolation.
Context
Studies using aged garlic extract or garlic powder standardized to allicin content have used varying preparations and doses, which limits comparison across trials; effects reported, where present, have been small.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.