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U.S. health agencies are targeting a threat to Americans that is readily available nationwide.

7-hydroxymitragynine, also known as 7-OH, is a concentrated form of kratom, a plant-derived substance that has been commonly used for pain relief and as a stimulant.

The concentrated byproduct has been linked to opioid receptors in the body, triggering the potential for abuse and various drug-related symptoms .

HEALTH OFFICIALS WARN OF DANGEROUS SUBSTANCE AVAILABLE IN STORES ACROSS THE NATION

The substance, which is considered a "synthetic opioid," has been bottled into drinks, powders and tablets that are sold at vape shops, gas stations and other stores across the country.

An uptick in 7-OH-related medical events has led t

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