Botulinum toxin is one of the most potent biological substances ever discovered — a nanogram per kilogram dose is enough to cause death. In licensed medical and cosmetic settings, it has an extraordinary safety record in over three decades of FDA-approved use because dosing, dilution, injection technique, and anatomical targeting are performed by trained professionals using verified products. Outside those settings, the picture is very different.
The CDC maintains an active warning on its official botulism outbreaks page about harmful reactions linked to counterfeit "Botox" or mishandled botulinum toxin injections — a category that has generated hospitalizations, ICU admissions, and mechanical ventilations in patients who believed they were receiving routine cosmetic treatment. The warning page was updated on February 26, 2026, confirming the CDC views this as an ongoing public health concern.
