LSD Microdosing Boosts Women's Attention but Not Men's, Study Finds
A preliminary study presented at the ECNP Congress in Munich found that 15 micrograms of LSD improved sustained attention and reaction times in women but had no measurable cognitive benefits for men. The research, led by Iva Totomanova at Maastricht University, analyzed data from 48 healthy participants who received four doses over two weeks. While women showed an 8% faster reaction time and fewer attention lapses compared to placebo, men showed no comparable improvements. Researchers caution that these effects may depend on the individual, the specific cognitive task, and the circumstances of use, rather than being a universal benefit of low-dose psychedelics.
Key points
- Women who received 15 micrograms of LSD reacted 8% faster to stimuli and had fewer attention lapses than those given a placebo.
- Men in the same study showed no significant improvement in reaction time or sustained attention after taking the microdose.
- The study involved 48 healthy participants (24 men, 24 women) who received four doses over two weeks in a double-anonymized trial.
- Researchers emphasize that benefits may vary by person, task, and context, rather than being a general cognitive boost for all users.
- Previous anecdotal reports of improved focus and mood from microdosing have not been consistently supported by controlled studies.
Background
Microdosing, the practice of taking sub-psychoactive doses of psychedelics like LSD, has gained popularity for purported mood and cognitive benefits, though prior controlled studies have yielded mixed results. Earlier research by the same team suggested women may feel the drug's influence more strongly than men, prompting this objective cognitive analysis. The current findings build on that hypothesis but highlight the complexity of individual responses to low-dose psychedelics.
How outlets are covering it
Nature highlights the 'very cool' nature of the findings and the potential for sex-specific cognitive benefits, while emphasizing the need for further investigation. The Debrief focuses on the stark contrast between outcomes for men and women, noting that while women showed clear improvements in sustained attention, men did not. Both sources agree that the results are preliminary and that benefits may depend on the specific cognitive task and individual circumstances, rather than being a universal effect of microdosing. The Debrief also notes that previous studies may have missed sex-related effects due to ambiguous results in other cognitive domains like working memory.
Why it matters
The findings challenge the assumption that microdosing provides uniform cognitive benefits and suggest that gender and individual differences play a significant role in how low-dose psychedelics affect the brain. This could influence future research and clinical applications, emphasizing the need for personalized approaches rather than one-size-fits-all recommendations for microdosing.
What to watch
Researchers plan to conduct larger, more controlled studies to verify these findings and explore why the effects differ by sex and cognitive task. The team also aims to investigate whether other psychedelics or doses produce similar sex-specific outcomes, and to better understand the mechanisms behind the observed differences in attention and reaction time.
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