The US Food and Drug Administration UU He said on Tuesday he had found high levels of heavy metals such as lead and nickel in some kratom products after field investigations.
The regulator has been restricting the substance, which advocates say helps relieve pain and reduces the symptoms of opioid withdrawal, but which the FDA says has similar effects to narcotics such as opioids and has led to dozens of deaths.
DAKOTA DEL SUR REPORTS THE FIRST DEATH FLUID OF THE SEASON
Metal levels in kratom-based products will probably not result in single-use poisoning, but could cause people to suffer if they are used persistently, said FDA Commissioner Scott Gottlieb.
"The findings of the identification of heavy metals in the kratom only strengthen our public health warnings about this substance," Gottlieb said in a statement.
Although the kratom is not controlled by the Federal Law on Controlled Substances, the US Drug Enforcement Administration does. UU It has been cataloged as a "medicine and chemical of interest".
CASES OF POLIO MYSTERIOUS AS THE HIGHEST DISEASE OF US IN 2016, CAUSING CONCERN
The leaves of the kratom tree, native to Southeast Asia, can be used as a stimulant or sedative.
The FDA said it was contacting companies that market kratom products to inform them about the results of metal testing.
In the past, the agency issued warnings against companies that market these products for opioid use disorder and has warned about the high rates of salmonella in the products.