Cannabis Smoke & Cardiovascular Health with Matthew Springer, PhD

Summary In this episode of High5 with Dr. Igor Grant, Dr. Matt Springer explains how inhaling smoke from combusted products such as tobacco and cannabis, as well as inhaling aerosol from e-cigarettes and cannabis vaping devices, may impair endothelial function, an early marker of cardiovascular risk. Drawing on rodent and human studies, he reports that chronic tobacco smokers, e-cigarette users, and cannabis smokers all show reduced vascular function. He also discusses evidence that chronic THC edible users may have impaired vascular function through a different mechanism than inhaled products. A central message is that “cannabis use” is too imprecise a term, because smoking cannabis and ingesting THC are very different exposures. His public health takeaway is simple: be aware of cardiovascular risks, practice moderation, and avoid exposing others to secondhand smoke. Key Topics Endothelial function and its role in cardiovascular health Effects of tobacco, cannabis, and e-cigarette smoke on blood vessels Mechanisms of smoke-induced vascular impairment Differences between inhaled and ingested cannabis effects Public health implications of secondhand smoke exposure Chapters 00:00 Preview 01:24 Dr. Springer's Background 03:43 Exploring Cardiovascular Effects of Cannabis 03:43 Personal Anecdote - Paul McCartney Concert 05:13 Understanding Endothelial Function 09:33 The Role of Endothelial Cells in Cardiovascular Health 09:58 Understanding Vascular Health and Flow Mediated Dilation 12:03 Translating Rodent Studies to Human Health 14:20 The Impact of Cannabis and Tobacco Smoke on Vascular Function 16:53 Chronic Use: Comparing Cannabis, Tobacco, and E-Cigarettes 20:15 The Science Behind Smoke and Its Effects 24:48 Distinguishing Cannabis Use from Smoking Effects 29:08 Moderation and Public Health Messaging 34:31 Secondhand Smoke: Risks and Recommendations