Vaping a small dose of CBD slightly improved short-term verbal memory in young adults

CBD enhanced verbal episodic memory performance compared to placebo (7.71 vs. 7.03 words recalled, adjusted difference 0.68 words, p=0.048). CBD did not affect attention or working memory, suggesting the effect was specific to episodic memory consolidation rather than general cognitive enhancement.

Double-blind, placebo-controlled, randomized crossover trial in 39 healthy young adults (34 completed). Participants vaped 12.5 mg CBD or placebo after learning 15 unrelated nouns. Primary outcome: number of words freely recalled 20 minutes later. Secondary outcomes: attention and working memory.

While the effect size was small (less than one additional word recalled), this is one of the first controlled demonstrations that CBD alone can enhance a specific type of memory in healthy people, supporting the idea that CBD interacts with the endocannabinoid system in ways that affect memory consolidation.

THC is well known to impair memory, while CBD may counteract some of those effects. This study suggests CBD alone may have a small positive effect on memory formation, opening questions about optimal CBD dosing for cognitive applications.

Very small sample. Borderline statistical significance (p=0.048). Tiny effect size. Single dose tested. Healthy young adults only. Short retention interval (20 minutes). Crossover design raises practice effect concerns.