How Kratom and 7 OH, Formerly Known as Gas Station Heroin, Went Mainstream GQ Stack'd 7 Hydroxymitragynine Vape 2g Delta 8 Resellers What is 7 OH? Understanding the Banned Kratom Compound Still Detox The supply of high potency opioids is expanding through products sold legally as herbal supplements in gas stations, vape shops, and convenience stores. The most prominent is 7 hydroxymitragynine, also known as 7 OH.