UConn Study Raises Concerns About Cannabinol Sleep Products
Research found signs that the plant-based ingredient may carry addictive potential.
Cannabinol, or CBN, appears in gummies, tinctures, capsules and other over-the-counter sleep products promoted as gentle, plant-based ways to unwind. Researchers at the University of Connecticut found signs of physical dependence after exposing mice to CBN, raising concerns for adults who use these products while trying to rest, recover and stay active.
The mice received CBN twice each day for three days. Its effects weakened with repeated exposure, a pattern known as tolerance. When CBN was removed, the animals displayed twitching and paw movements associated with withdrawal. Mice trained to react to THC also responded to CBN, suggesting the two substances may produce related internal effects in mice. The researchers said CBN activates some of the biological systems involved in cannabis dependence, even though it is considered milder than THC.
At lower, nonpsychoactive doses, CBN also reduced immune activity during a simulated bacterial challenge in mice. The study does not establish how CBN affects people, including its sleep benefits, risks at high doses or consequences of long-term use. More research is needed to clarify dosing and potential therapeutic uses. The findings appeared in the November 2026 issue of Drug and Alcohol Dependence.
- Study published in the November 2026 issue of Drug and Alcohol Dependence.
- Mice received CBN twice daily for three days.
- Repeated exposure produced tolerance and withdrawal signs in mice.
- CBN also reduced immune responses at lower, nonpsychoactive doses.
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