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.
Children and pregnancy / Measured in people or real products
Mothers who used perfumed laundry detergent had significantly higher levels of the musk chemical tonalide (AHTN) in their breast milk than mothers who used unscented detergent.
Moderate evidence: Product-use data from a N=44 subset; cross-sectional association, not an intervention; adjusted for sampling year.
Source: Lignell 2008, Environmental Science & Technology Link to this fact
Children and pregnancy / Measured in people or real products
Laundry detergents marketed 'baby safe' (n=5) were fragranced in 80% of products (4 of 5) and had the highest average common-allergen count of any detergent subgroup studied (2.6 allergens/product), higher than plain scented-liquid detergents (2.4/product).
Moderate evidence: Small subgroup, n=5; ingredient-label survey, not a measured exposure or clinical outcome.
Information, not medical advice. See also: myths we won’t tell you.