The 2021 session brought new challenges, as seen in a measure drafted by Representative Yadira Caraveo, a Democrat from Adams County. A leaked version of her "Safe & Healthy Marijuana Use" proposal called for a ban on "any form of legal marijuana, recreational or medical, testing over 15 percent THC," as well as "a number of restrictions to the state's medical marijuana program, including a requirement that medical marijuana patients only be allowed to purchase a pre-designated dosage and allotment of certain products decided by a physician, similar to a drug prescription." That proposal was never introduced. But along with House Speaker Alec Garnett, Caraveo is among the sponsors of House Bill 21-1317, "Regulating Marijuana Concentrates," which is moving along in the Colorado Legislature. According to its summary: "The bill requires the Colorado School of Public Health to do a systematic review of the scientific research related to the physical and mental health effects of high-potency THC marijuana and concentrates. The bill creates a scientific review council to review the report and make recommendations to the general assembly. Based on the research and findings, the Colorado School of Public Health shall produce a public education campaign for the general public, to be approved by the council, regarding the effect of high-potency THC marijuana on the developing brain and mental health."