General Mills is recalling 10 million pounds of flour that has been linked to 38 instances of E. coli in 20 states. Some of that flour may have been sold in local grocery stores.

The recall affects Gold Medal, Signature Kitchens and Wondra brands of flour. Six UPC codes are affected, and most of the recalled products have “Better if Used By” dates between May and June 2017. For a full, detailed list of affected products, click here.

The recall is a voluntary recall. No E. coli has been found in any General Mills flour product, but several of the 38 people sick with E. coli said they had made something homemade with flour at some point before falling ill. The recall has been issued “out of an abundance of caution,” according to the General Mills website.

The affected flour was sold at Safeway and Albertsons, among other grocers.

Seniors, the very young and persons with compromised immune systems are most at risk of contracting E. coli. Symptoms include dehydration and diarrhea.

General Mills also reminds customers not to consume any products containing raw flour. Most bacteria is rendered harmless with proper cooking.