Don’t take our word for it. Here’s every fact on this site, with its evidence grade, its caveats, and a link to the source, so you can check us.
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.
Laws and loopholes / Other evidence
In the EU, free formaldehyde in cosmetics is capped at 0.2% (0.1% in oral hygiene products) and products with formaldehyde or releasers must carry a 'contains formaldehyde' warning above 0.05%, whereas the authors say the US has no specific norms.
Weak evidence: Regulatory statement from a 2011 discussion citing a 1986 directive; rules have changed since (see the Goossens 2022 page) and the US statement is not checked here.
Laws and loopholes / Government agency
The CHRC says scent-free policies should apply to employees and non-employees alike, name the products to avoid, be flexible, and carry consequences for non-compliance, and that employers should stay open to other accommodation options.
Weak evidence: Policy-design advice with no cited evidence base (footnotes not captured).
Source: CHRC 2026 web Link to this fact
Laws and loopholes / Other evidence
Station wastewater treatment in Antarctica (biological treatment with UV or chlorine) is judged by the authors to be ineffective for personal-care chemicals, and one-third of permanent and two-thirds of summer stations have no treatment.
Weak evidence: Efficacy is asserted, not quantified for these compounds; the authors admit plant conditions differ too much to compare treatments.
Source: Balakrishna 2023 (review), Environmental Research Link to this fact
Information, not medical advice. See also: myths we won’t tell you.