Can triclocarban and bisphenol S together cause worse health effects than either chemical alone?

What's actually in it

Triclocarban is an antibacterial agent in bar soaps and body washes. Bisphenol S (BPS) is the BPA replacement in "BPA-free" products. You're exposed to both at the same time through different products in your daily routine. These chemicals can interact inside your body in ways that multiply their effects.

What the research says

A 2026 study in J Hazard Mater tested the combined toxicity of triclocarban and bisphenol S. The researchers found synergistic effects, meaning the two chemicals together caused more damage than the sum of their individual effects. The combination disrupted multiple biological systems simultaneously.

This matters because safety testing usually looks at chemicals one at a time. In real life, you're exposed to dozens of chemicals simultaneously, and their combined effects can be far worse than predicted.

Switch to plain soap without antibacterial agents. Avoid "BPA-free" products that contain BPS. Reduce your total chemical load by simplifying your product choices.