Can chemicals in plastic products lower your child's vitamin D levels?

What's actually in it

Endocrine-disrupting chemicals (EDCs) are in products throughout your home. Phthalates from plastic toys and food packaging, bisphenols from water bottles and can linings, PFAS from stain-resistant fabrics, and parabens from personal care products all fall into this category. Kids encounter them from dozens of sources every day.

What makes these chemicals different from a simple toxin is that they mimic or block hormones. They can trick the body into thinking it received a hormonal signal that was never sent, or block a real signal from getting through.

What the research says

A 2026 study in Environmental Research, part of the HOME Study, measured levels of multiple EDCs in children and compared them to vitamin D biomarkers in the blood.

Children with higher exposure to mixtures of EDCs had lower vitamin D levels. The effect wasn't driven by a single chemical. It was the combination of multiple EDCs acting together that mattered most.

Vitamin D is essential for children. It builds strong bones, supports the immune system, and plays a role in brain development. Low vitamin D in childhood is linked to weaker bones, more frequent infections, and a higher risk of autoimmune diseases later.

The connection makes biological sense. Vitamin D is a hormone, and its production and activation in the body are regulated by the same enzyme systems that EDCs disrupt. When those systems get scrambled by chemical exposure, vitamin D metabolism takes a hit.

The study highlights that real-world exposure isn't to one chemical at a time. Kids are exposed to dozens of EDCs simultaneously, and those chemicals can amplify each other's effects. Even if each individual chemical is at a "safe" level, the mixture may not be.

Reduce your child's chemical exposure by using glass or stainless steel for food and drink. Choose fragrance-free personal care products. Avoid stain-resistant fabrics for items kids touch often. And make sure your child gets enough sunlight and vitamin D-rich foods to counteract any shortfall.