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The fragrance facts, graded

Every fact on this site, with its evidence grade, its caveats and a link to the source.

We start you on the strong ones: findings that have been replicated or come from one large, well-controlled study. Moderate and weak facts are here too, labeled for what they are. Use “Link to this fact” to share a single card.

1 facts match “laundry”

Skin allergy / Measured in people or real products

Among all detergent types studied, laundry (textile) detergents had both the highest share of products naming a fragrance allergen (50.0% of 270 products) and the highest average number of named allergens per product (1.7) — ahead of dish soap, glass cleaner, toilet cleaner, and dishwasher detergent.

Moderate evidence: Named-on-label only, not measured concentration or skin dose; German 2015 sample.

Source: Wieck 2018, Regulatory Toxicology and Pharmacology Link to this fact

Information, not medical advice. See also: myths we won’t tell you.