Doctors warn against popular plant supplement that turns people’s skin BLUE and is linked to spate of deaths

Kratom has become increasingly popular as a treatment for opioid withdrawal, with many believing it is a safe herbal supplement. But doctors are reigniting warnings that it could turn skin blue. Kratom has become increasingly popular as a treatment for opioid withdrawal, with many believing it is a safe herbal supplement. But doctors are reigniting warnings that it could turn skin blue.