California Governor Jerry Brown on Thursday signed legislation banning plastic microbeads—tiny abrasives often found in cosmetic products.

The bill, known as AB888, is one of the strictest in the country and bans the use of all microbeads, including biodegradable ones, which other states allow. California joins Colorado, Illinois, Indiana, Maine, Maryland, and New Jersey in banning the environmentally destructive and cosmetically useless things… Falling behind again, huh Oregon?

Microbeads, for those of you who don’t exfoliate properly, look like tiny dots and are suspended in cleansers and other face and body scrubs. Manufacturers use microbeads to make consumers think they’ll have beautiful, glowing skin. But when they’re rinsed off in the shower or sink those tiny dots end up in waterways.

In 2014, a study conducted by an associate chemistry professor in the waters of Lake Michigan found, on average, “17,000 bits of tiny plastic items” per square kilometer. Concentrations in lakes Erie and Ontario were even higher.

Scientists and environmental groups studying the effects of plastics in our lakes, rivers, and oceans warn that we are what we eat, and if those tiny beads—which are about the same size and shape as fish food—end up in marine life, then they probably also end up in those of us that eat fish.