The Drug Enforcement Administration (DEA) is cracking down in California on a potent marijuana product called "wax," according to ABC News. Wax is legal—and popular—in Colorado.
Wax is a distillation of marijuana said to be so potent that a single hit will keep a person high for more than a day, the article notes.
A person making wax uses the flammable substance butane to strip out the THC, the chemical in marijuana that causes a high.
"There is no weed out there that possesses the punching power that the wax does," an anonymous undercover DEA informant told ABC News' "Nightline." "And it's like smoking 20 joints of the best grade of weed that you have into one hit of the wax."
Gary Hill of the DEA's San Diego office said, "We have seen people have an onset of psychosis and even brain damage from that exposure to that high concentration of THC. Our concern is that this is going to spread before we get it under control."
In Colorado, wax is legal for anyone over the age of 21. It is sold in recreational marijuana dispensaries. A three-day contest called the X-Cup, held in Denver, is designed to determine who can make the most potent batch of wax.