Do phthalates and DINCH from baby products end up in breast milk?

What's actually in it

Phthalates (DEHP, DBP, DiNP) and their replacement DINCH are in soft plastic toys, baby bottle components, vinyl flooring, personal care products, and food packaging. Nursing mothers absorb these plasticizers from everyday products, and the chemicals transfer into breast milk.

Babies nursing exclusively rely entirely on breast milk for nutrition, making them especially vulnerable to any chemicals it contains.

What the research says

A 2026 study in Environ Int measured phthalate and DINCH metabolites in both the urine and breast milk of nursing mothers. The study confirmed that these chemicals don't just pass through the body. They partition into breast milk at measurable levels.

DEHP metabolites were the most commonly detected in breast milk, followed by DiNP and DINCH metabolites. The levels in breast milk correlated with the levels in maternal urine, confirming the chemicals came from the mother's own exposure.

The researchers calculated the infant daily intake from breast milk and found it was within safety limits for most individual chemicals. But the combined exposure to multiple plasticizers raised the total dose closer to concerning levels.

Breastfeeding is still the best option for infant nutrition. But mothers can reduce the chemical load in their milk by using glass baby bottles, choosing phthalate-free personal care products, storing food in glass instead of plastic, and avoiding soft vinyl products in the home.