NBC News reports states investigating the public health implications of a variety of new high-potency products amid questions about a possible link to psychosis. The newer products are called marijuana concentrates and are commonly known as wax and shatter. They can have levels of THC, the psychoactive component of marijuana, as high as 85 percent to 90 percent.
States that legalized marijuana now researching mental health risks of high-potency cannabis [NBC News]