Cannabis Users Mostly Ignore Health Warnings on Products and Doubt Their Accuracy | Research

The takeaway

Focus groups with 77 cannabis consumers found most were unaware of existing health warnings, and when shown hypothetical warnings, many expressed disbelief, wanting cited sources and stronger visual cues.

Regulators designing cannabis product labeling, public health communicators, and cannabis industry professionals.

Most consumers unaware of or ignoring current cannabis health warnings

What the researchers found

Cannabis consumers reported being unaware of or choosing to ignore health warnings on products they used. When presented with hypothetical warnings, many expressed disbelief about the accuracy of health claims. Personal experience with cannabis harms was the main factor in believing or disbelieving warnings. Participants requested cited sources, direct language, and enhanced visuals to improve warning effectiveness.

Why it matters

If cannabis health warnings are not noticed or believed by the people they target, they are failing at their primary purpose. This study provides direct consumer feedback on how to make warnings more effective, including the key insight that evidence citations and visual elements matter more than text alone.

The numbers in context

N = 77 consumers in 12 focus groups. Ages 22-68, median 42. All lived in legal recreational states. All had used cannabis in past 30 days.

How the study worked

Twelve focus groups with 77 cannabis consumers aged 21+ (median age 42) who had used cannabis in the past 30 days and lived in states with legal recreational cannabis. Conducted February-March 2025. Participants first described warnings on products they used, then reacted to hypothetical health warnings.

What this study cannot tell us

Qualitative study cannot quantify warning effectiveness. Participants from legal states may have different attitudes than those in illegal states. Focus group dynamics can amplify dominant opinions. The study examined reactions to hypothetical warnings, not real-world behavioral responses.

How to read the evidence

Qualitative focus group study with 77 participants providing consumer perspectives. Useful for informing warning design but cannot test effectiveness.

When this study was published

Published in 2025 with focus groups from February-March 2025.

The bigger picture

Tobacco health warnings went through decades of refinement to become effective. Cannabis warnings are still in their infancy, and this study suggests they need similar evolution. The finding that consumers want evidence-based, visually reinforced warnings mirrors what worked for tobacco.

Questions still open

Would evidence-cited, visually enhanced warnings actually change cannabis use behavior? Are there specific warning messages that would be most credible to heavy users?

Common questions

Why do cannabis users ignore health warnings?

Consumers reported that current warnings are vague, not evidence-based, and contradict their personal experience. Many viewed warnings as government overreach rather than genuine health information.

What would make warnings more effective?

Consumers suggested citing specific research studies, using direct and explicit language about harms, and including visual elements. Personal experience was the strongest driver of believing warnings.

Read the original research

"Well, if they exist, I ignore them": A focus group study of recall and reactions to cannabis health warnings by cannabis consumers in the United States.

Preventive medicine reports, 60, 103306

View on PubMed ↗Publisher’s paper ↗

Citation

Massey, Zachary B; Ibe, Chinomso; Smith, Michael A; Vogel, Erin A; Thrasher, James F; Hammond, David. (2025). "Well, if they exist, I ignore them": A focus group study of recall and reactions to cannabis health warnings by cannabis consumers in the United States.. Preventive medicine reports, 60, 103306. https://doi.org/10.1016/j.pmedr.2025.103306