Ben & Jerry’s — a brand famous for its quality and eco-friendly practices — is under fire after a test uncovered a controversial ingredient in its ice cream. 

The Organic Consumers Association (OCA) found glyphosate, the main ingredient in weedkillers like Roundup, in 10 out of 11 samples of the company’s ice cream flavors, the New York Times reported on Tuesday.

While the levels of glyphosate were well below the legal limit set by the Environmental Protection Agency, the Organic Consumers Association argues that any presence of the pesticide product is misleading and potentially dangerous. 

“It’s time for Ben & Jerry’s to announce it will immediately begin transitioning to 100-percent organic,” using zero pesticides in production, the OCA said in a post on its website. “Otherwise conscious consumers have no choice but to launch a national and, if necessary, international protest campaign and boycott.”

The OCA has called for Ben & Jerry’s to stop labeling its ice creams as “natural” because the brand’s dairy cows consume genetically-engineered corn (the brand told the Times that it is working to find all-natural alternatives). Add-ins, such as peanut butter or cookie dough, containing ingredients that have been sprayed with the weedkiller may also be the source of the glyphosate in the ice creams, according to the Times. 

The question of if glyphosate is dangerous to consume is still hotly debated. While the World Health Organization said in 2015 that the weed killer was “probably carcinogenic,” Reuters reported in June that scientific data may not fully back that claim. 

Despite the continued debate, many customers simply do not want to have a herbicide ingredient in their food. Soon after the Times published its article on the OCA’s ice cream test, the brand began receiving complaints and boycott threats on social media.