A federal grand jury indicted a Louisiana woman and a Florida man July 29 alleging they colluded to distribute illegal drugs disguised as diet pills.

The indictment was unsealed Wednesday and charges Darlene V. Krueger, 53, of Louisiana, with distributing pills using an illegal ingredient, called sibutramine, that significantly increases risk of stroke or heart attack and labeled them “all natural,” U.S. Attorney Walt Green said. John Wesley Hoag, of Florida, pleaded guilty July 29 to importing the diet pills from manufacturers based in China and giving them to distributors, including Krueger and others. Krueger and Hoag face significant jail time, fines, restitution and post-prison supervision, Green said in a news release.

Between 2009 and 2014, Krueger worked with Hoag, 51, to distribute the dietary supplements to customers throughout the U.S. using misleading names such as “Slim Fort Double Power Slimming Capsules,” Green said.

The ingredient was removed from the U.S. market in 2010 after studies revealed its side effects.