Prepare to become a whole different kind of label snob: Whole Foods recently announced that the chain will require labeling on all genetically modified (GM) foods sold in its stores, making it the first U.S. retailer to call out these products. The president of Whole Foods said he plans to roll out this new labeling system within five years, since the process will likely take a while to implement in the chain’s 300-plus stores.

So what exactly are GM foods, and why should you be able to pick them out on a store shelf? They’re essentially foods that have been modified by combining the DNA of two different species. Examples include most soybeans and corn, as well as anything that contains them, like high fructose corn syrup or canola oil. Although the FDA has deemed these products safe, many researchers caution that genetically modified organisms (GMOs) may contain more allergens and health risks than naturally grown foods. Jeffrey Smith, best-selling author of Seeds of Deception, notes that animal studies have found an increased risk of tumors, organ damage, gastrointestinal disorders, immune disorders, and more as a result of long-term GMO consumption.

In Europe, grocery stores have almost completely removed GM foods from shelves—a result of a 2003 labeling requirement similar to the one Whole Foods is proposing, says Smith. “Now there are so few products [in Europe] that say they contain GMOs that it’s as if they’re banned.”

Whole Foods already sells many products labeled “Non-GMO Project Verified” (meaning they don’t contain any GM ingredients), and the store has seen a huge increase in the sale of these foods. “These are signs of a tipping point of consumer rejection,” says Smith. “The Whole Foods announcement was both a reflection of that and something that will propel the non-GMO movement more quickly.”

So what can you do until the new label system is up and running? Smith suggests buying organic whenever possible and looking for existing labels noting that a product is Non-GMO Project Verified. You can also try to cut down on processed foods, which typically contain GM ingredients.

More from Women’s Health:
Frankenfish and the World of Genetically Modified Foods
Confused by Organic Foods? Not After This
The 14 Dirtiest Fruits and Veggies

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