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.
Laws and loopholes / Review of other studies
No law requires manufacturers of scented candles to prove the safety of their products before releasing them onto the market in the US or EU, per the authors.
Weak evidence: General regulatory claim by the review authors, not independently verified against current statute text in this ingest.
Source: Adamowicz 2019, Cancer Prevention Research Link to this fact
Laws and loopholes / Other evidence
Scented-candle manufacturers should be required to disclose indoor-pollution and health risks on labels or packaging under new labeling and packaging laws.
Weak evidence: A policy recommendation with no current legal requirement cited; no such disclosure law exists today per this source.
Source: Nazir et al. 2024, Annals of Medicine & Surgery Link to this fact
Information, not medical advice. See also: myths we won’t tell you.