Though the cereal-makers have never used GMO oats, General Mills communications exec Tom Forsythe said that the company did switch to non-GM cornstarch and non-GM cane sugar.
The change won't apply to Honey Nut Cheerios or other variations. Such a move would be "difficult, if not impossible," rep Mike Siemienas said in a statement.
Forsythe emphasized that the change is "not about safety," noting that "biotech seeds, also known as genetically modified seeds, have been approved by global food safety agencies and widely used by farmers in global food crops for almost 20 years."
"We did it because we think consumers may embrace it," he added.
WaPo's Lydia DePillis notes that while there's scant evidence that GMOs post any health risk, consumers worry about them. She points to a recent ABC News poll, in which more than half of Americans said they believed GMO foods were unsafe.
Cheerios undoubtedly hopes that the change will impact its bottom line. Sales for the brand dipped 7 percent last year.