Breyers, the largest ice cream brand in the Unilever portfolio, will begin using milk and cream from cows that have not been treated with artificial growth hormones, Unilever announced in a press release.

To date, Breyer’s will be the largest packaged ice cream brand in the U.S. to make the switch, with other Unilever ice cream brands to follow.

Breyers also announced that it will begin using sustainably sourced, Rainforest Alliance-certified vanilla beans from Madagascar across its full product line.

The entire Unilever ice cream portfolio — including Fruttare, Good Humor, Klondike, Magnum, and Popsicle Brands — is scheduled to follow suit.

“Breyers has a longstanding history of offering frozen treats with high-quality ingredients that moms feel good about,” said Alessandra Bellini, vice president of brand development at Unilever North America. “These industry-leading changes are the latest in our commitment to do right by parents and the environment.”