By Amy Norton

HealthDay Reporter

THURSDAY, June 30, 2016 (HealthDay News) -- Hundreds of clinics across the United States are marketing unapproved stem cell treatments for conditions ranging from aging skin to spinal cord injuries, a new study finds.

In an online search, researchers found at least 570 clinics offering unapproved stem cell "therapies." They tend to be concentrated in a handful of states -- including Arizona, California, Colorado, Florida, New York and Texas -- but are scattered across many other states, too.