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.
Indoor air / Measured in people or real products
In a European study that measured the air 182 adults actually breathed over 48 hours, exposure to pine- and citrus-type scent chemicals from cleaning products and fragrances rose with the number of children at home (3-carene median 0.9 to 2.5 µg/m³); the authors attribute this to more cleaning.
Moderate evidence: Late-1990s, small subgroups, attribution to cleaning is the authors' inference; CEFIC-LRI co-funded.
Source: Edwards 2006, Atmospheric Environment Industry-funded Link to this fact
Indoor air / Self-reported survey
Living in a rural area was linked to higher urinary metabolites of benzyl and butyl phthalate in both Swedish mothers and children (about 2.6 times higher MBzP in rural children, unadjusted), and mother-reported PVC flooring or wall coverings was linked to higher MBzP in mothers only; these are not fragrance phthalates.
Moderate evidence: Area, education, PVC and well water are entangled; PVC was reported by the mother, not measured in dust.
Source: Larsson 2014, Environment International Link to this fact
Information, not medical advice. See also: myths we won’t tell you.