What is it?
Phthalates are a class of chemical plasticisers added to PVC and other plastics to make them soft and flexible. They are also widely used as solvents and fixatives in synthetic fragrance, which is why a product simply labelled "fragrance" or "parfum" can contain dozens of undisclosed phthalate compounds. They leach readily from products into food, air, dust and skin.
What it does to your body
Male reproductive harm
DEHP and DBP are associated with reduced testosterone, lower sperm count, abnormal sperm morphology and testicular atrophy at high doses.
Early puberty in girls
Epidemiological studies link phthalate exposure to earlier onset of breast development and menarche.
Pregnancy complications
Higher phthalate levels in pregnant women are associated with preterm birth and gestational diabetes.
Neurodevelopment
Prenatal phthalate exposure linked to attention deficits, lower IQ and behavioural problems in children.
Thyroid disruption
Several phthalates interfere with thyroid hormone metabolism, affecting energy regulation and metabolism.
How widespread is the problem?
CDC biomonitoring data consistently finds phthalate metabolites in nearly all urine samples tested. Women of reproductive age show some of the highest levels, likely due to heavier use of personal care products. Boys are considered particularly vulnerable due to the anti-androgenic effects during critical developmental windows.
Where it hides in your home
Key research
Swan et al.: Decrease in Anogenital Distance
Landmark study showing prenatal phthalate exposure measurably alters male genital development, a marker of reproductive health.
NHANES Phthalate Biomonitoring
CDC national biomonitoring consistently finds phthalate metabolites in over 95% of urine samples, confirming near-universal exposure.
EU REACH SVHC Listing
Multiple phthalates listed as Substances of Very High Concern under EU REACH regulations, restricting their use in consumer articles.
Most phthalate metabolites are excreted in urine within one to two days. This is why fragrance and personal care products are such a significant source, as they are applied daily, maintaining a constant low-level exposure. Eliminating synthetic fragrance is one of the most impactful single changes you can make.