America’s unregulated stem-cell clinics

The United States is home to a booming industry in direct-to-consumer stem-cell clinics, which offer unproven treatments for conditions that range from sore joints to macular degeneration. The facilities argue they aren’t subject to regulation because they only inject people with their own cells. But tales of high-pressure sales tactics, false claims and terrible outcomes are leading scientists and politicians to push for more oversight.

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