The majority of food supplements are untested and unregulated.
A 28-year-old female bodybuilder with no risk factors for liver disease was hospitalized with acute liver failure after taking herbal supplements as recommended on the label for increased energy and burning fat. These uncontrolled supplements contained usnic acid, green tea, and guggul tree extracts. An immediate liver transplant saved her life. Dietary supplements are responsible for almost 20% of drug-related liver injury, up from 7% ten years ago.