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What we check for:

FragrancesPreservatives (MI/MCI)Sulfates (SLS/SLES)Formaldehyde ReleasersParabensEU 26 Fragrance Allergens

Tools

All toolsBrowse every free checker in one place.Ingredient scannerSnap a label or paste an INCI list—fast irritant flags.Patch test translatorTurn clinic allergen names into what to read on labels.Cross-reactor checkerSee related names and hidden sources for one allergen.Product comparatorCompare two formulas with plain-English ingredient notes.Ingredient conflict checkerFind actives that clash and a safer layering order.Trigger detectiveSpot ingredients that keep showing up when you react.
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AllerNote is an educational tool, not medical advice. We check products against known allergen databases but cannot diagnose allergies. For diagnosis, consult a board-certified dermatologist.

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