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.
Fragrance is everywhere / Other evidence
In the same study, minority households in dry-cleaner buildings had mean indoor air of about 82 micrograms per cubic meter versus about 17 for non-minority households (about five times), and minority children's mean blood level was 0.27 versus 0.12 ng/mL.
Weak evidence: Stratified differences not statistically significant; 26 vs 31 households for air, 17 vs 21 children for blood; building selection weighted toward minority and low-income areas.
Source: Storm 2013, Environmental Research Link to this fact
Fragrance is everywhere / Other evidence
In the French cohort of about 3,000 children discussed in the review, maternal occupational solvent exposure in pregnancy was associated with dose-related increases in hyperactivity and aggression at age 2, and one in five mothers reported solvent exposure in common jobs including nurse, cleaner, hairdresser and beautician.
Weak evidence: Occupational solvents as a class, with no individual compound identified; it says nothing about perfume or fragrance exposure at home.
Source: Grandjean & Landrigan 2014, Lancet Neurology, The Lancet Neurology Link to this fact
Information, not medical advice. See also: myths we won’t tell you.