Unilever has announced it is reformulating its Breyers brand of ice cream in the US to only use milk from cows that are not treated with artificial growth hormones.

The move affects the whole Breyers portfolio – Fruttare, Good Humor, Klondike, Magnum and Popsicle brands. Unilever claims it is the “largest” ice cream manufacturer to make such a commitment.

In addition, Breyers will source all of its vanilla from sustainably farmed and Rainforest Alliance Certified vanilla beans

“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.”