Are DEHP-free plastic baby toys actually safer for brain development?

What's actually in it

DEHP (di(2-ethylhexyl) phthalate) was once the most common plasticizer in soft plastic toys, teethers, and baby products. It made hard PVC soft and chewable. After research showed it could harm hormones and brain development, regulators banned or restricted it in children's products.

Manufacturers switched to replacement plasticizers like DINCH, DEHT, and ATBC. These are now in many products labeled "phthalate-free" or "DEHP-free." Parents see those labels and assume the product is safe. But "DEHP-free" doesn't mean "plasticizer-free." It just means a different chemical is doing the same job.

What the research says

A 2026 study in Environment International tested DEHP and three of its replacements on human neurospheres, which are lab-grown clusters of human brain cells that mimic how a developing brain grows and organizes itself.

All three replacement plasticizers caused neurotoxic effects. They disrupted how brain cells grew, divided, and formed connections. In some tests, the replacements were just as damaging as DEHP itself.

This matters because these replacements were approved for use in children's products partly because they hadn't been studied enough to show harm. This study directly compared them to DEHP using human brain cells, and the results suggest the switch may not have made things safer.

The study used human cells, not animal cells, which makes the results more relevant to what could happen in a real baby's developing brain. Brain development in the first years of life depends on cells dividing and connecting in very specific patterns. Chemicals that disrupt those patterns can have lasting effects.

The safest option for baby toys and teethers is to skip soft plastic entirely. Natural rubber, untreated wood, and food-grade silicone don't need plasticizers at all. If a toy is soft and made of plastic, it contains a plasticizer, whether or not the label mentions it.