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.
What you can do / Measured in people or real products
Because this study's own route argument points to prenatal (placental) transfer, not breastfeeding, as the main way synthetic musk fragrance chemicals reach a baby, choosing fragrance-free personal-care and laundry products during pregnancy specifically, not only while breastfeeding, is a plausible way to reduce an infant's earliest musk exposure.
Weak evidence.
Caveats
Inferred from pharmacokinetics (musks' short half-life) and matrix comparisons, not from measured product use or from an intervention study; no study has tested whether reducing a mother's product use lowers her infant's cord-blood or milk musk levels.
What you can do / Measured in people or real products
Because fragrance musk exposure has been linked to personal-care and laundry product use in other studies, choosing fragrance-free cosmetics and laundry products during pregnancy and breastfeeding is a plausible way to reduce a baby's prenatal and infant musk exposure.
Weak evidence.
Caveats
This paper collected no personal-care-product-use data itself; the action is inferred from sibling studies (Hutter 2009, Lignell 2008) that did test product use, not from this paper's own data.
Source: Zhang 2015, International Journal of Hygiene and Environmental Health Link to this fact
Information, not medical advice. See also: myths we won’t tell you.