The poisoned individuals received IV drips containing glutathione, an antioxidant found naturally in the body that is marketed—without scientific backing—for claims such as detoxification, immune support, energy enhancement and skin brightening. There are no FDA-approved glutathione injectable products in the United States, and studies have found little to no evidence supporting its use for these purposes.
Despite this, glutathione is widely available as an oral supplement and has become a staple at wellness clinics offering vitamin and supplement IV infusions. The problem identified by the CDC and FDA is that some compounding pharmacies are preparing these infusions using glutathione powders graded only for dietary supplements taken orally. That grading is critically different from the purified, sterile-grade materials required for injectable drugs.
The use of non-sterile ingredients in IV drips can introduce harmful bacterial toxins directly into the bloodstream. The agencies have not released details on the specific clinics involved or the exact locations beyond noting that incidents occurred in four states, but they are urging compounding pharmacies to stop using dietary supplement-grade glutathione in injectable products and to comply with federal compounding regulations.