California's Proposition 65 Drives Manufacturers to Remove Toxic Chemicals

A new study reveals the landmark law has led to widespread reformulation of products to avoid harmful substances.

Proposition 65 requires companies selling products in California to disclose the presence of chemicals linked to cancer, birth defects, or reproductive harm.
A study found 78% of interviewed manufacturers reformulated products to avoid labeling them with Proposition 65 warnings.
Many companies opted to eliminate harmful chemicals entirely, rather than using them below safe harbor thresholds, to reduce litigation risks and protect consumers.
The law’s influence extends beyond California, with 63% of manufacturers applying reformulations nationwide and reducing chemical exposure across the U.S.
Researchers highlight the role of state-level legislation in driving corporate transparency and public health improvements in the absence of federal regulations.