Study Finds Most Colorado Cannabis Products Fall Short on Mandatory Labeling

Researchers at the University of Colorado Boulder have published a study in the Journal of Cannabis Research highlighting widespread non-compliance with state cannabis labeling mandates. Investigators found that just one in seven retail products included all necessary disclosures, while cannabis flower items performed worst with only 2% meeting every regulatory requirement. The investigation involved purchasing 480 non-medical items—ranging from loose bud to concentrates—across 52 dispensaries through an industry partner.

While basic safety symbols were widely present, other mandatory details were frequently missing. Nearly all packages displayed the universal THC symbol alongside driving and pregnancy warnings. However, fewer than half included expiration dates, and only 17% noted proper storage conditions. Furthermore, follow-up evaluations demonstrated that roughly half of flower items inaccurately represented their tetrahydrocannabinol content, with prerolled joints frequently overstating potency levels.

Study authors noted that these findings suggest gaps in current regulatory enforcement and point to potential consumer safety challenges. Because federal restrictions prevent university scientists from handling cannabis directly, the research relied on industry collaboration. Observers emphasize that observational findings like these highlight the need for standardized consumer information as retail markets expand nationally, though individual health decisions regarding cannabis use should always be discussed with a qualified medical professional.

What to know about cannabis product labeling

• Only 14% of tested retail cannabis items met all state labeling requirements.
• Concentrates showed better compliance and more accurate THC potency measures than loose flower or prerolled joints.
• Mandatory details like expiration dates and storage instructions were frequently absent from packaging.