Taco Bell customers have found a culprit besides beans, cheese and sour cream to blame for their post-meal indigestion: the “diarrhea parasite” known as Cyclospora. Parent company Yum Brands is a few shreds of lettuce away from heartburn as it heads into earnings today. Both brands reacted quickly: Taco Bell nixed lettuce from all US locations the day after the FDA’s first report, while Taylor Farms stopped sourcing iceberg lettuce from central Mexico. To win customers back, Taco Bell has rolled out deals on some lettuce-less fan favorites. Taco Bell could be on a similar timeline, especially considering the social media love it’s getting from diehard fans.