What is hemp? The congressional definition is anything less than 0.3% dry weight delta-9 THC. This presents a major loop hole, legalizing intoxicating products that are tested for the first time, not on lab rats, but on our children. Dr. Rossheim is an expert on these derived intoxicating cannabis products and shares his research.

Matthew Rossheim, PhD, MPH, CPH, FAAHB is an Associate Professor in the College of Public Health at the University of North Texas Health Science Center. His work focuses on the marketing of especially high-risk products often used by young people, and he is one of the nation’s leading public health experts on derived intoxicating cannabis products (such as delta-8 THC) and “supersized” alcopops (such as Four Loko). His work, including more than 100 peer-reviewed research manuscripts and scientific presentations, has helped influence the development of laws and regulations from the local- to federal-levels. His research has been cited in reports by the U.S. Food and Drug Administration (FDA) and World Health Organization (WHO), as well as featured by BBC, CNN, CBS, NBC, NPR, Washington Post, and The New York Times. In recognition of his efforts that have profoundly influenced public health policy, he was awarded the 2025 Advocate of the Year award by CADCA.