•A 2026 preclinical study suggests that the effects of psilocybin on social behavior and inflammation are context-dependent and can be altered by factors such as exercise and food restriction.

•In a mouse model of anorexia, psilocybin did not broadly alter sociability but did reduce novelty-seeking in control mice and enhance food-seeking motivation in food-restricted mice.

•The study found that psilocybin elevated levels of the inflammatory marker interleukin-6 in exercising mice, and these levels correlated with social novelty preference.

•These findings highlight the complexity of translating psychedelic treatments to eating disorders and suggest that a personalized approach may be necessary.

•The research underscores the importance of considering metabolic state, exercise history, and illness duration when developing psychedelic-assisted therapies for eating disorders.

The potential of psilocybin-assisted therapy to treat a range of mental health conditions has generated significant excitement and hope. However, as the field matures, researchers are beginning to uncover the nuanced and complex ways in which this powerful compound interacts with the human body. A 2026 preclinical study published in Psychedelics reveals that the effects of psilocybin on social behavior and inflammation are not universal, but are instead context-dependent and can be significantly altered by factors such as exercise and food restriction (1).

This research, which used a mouse model of anorexia nervosa, has important implications for the development of psilocybin-assisted therapies for eating disorders. It suggests that a one-size-fits-all approach may not be effective and that a more personalized and context-aware approach is needed. These findings are particularly relevant given the ongoing clinical trials investigating psilocybin for anorexia nervosa, as highlighted in a 2023 study in Nature Medicine (2), and the growing body of research exploring the link between psychedelics and the serotonin system in eating disorders, as discussed in a 2025 review in the International Journal of Molecular Sciences (3).

How Do Eating Disorders Alter the Effects of Psilocybin?

The 2026 study found that in a mouse model of anorexia, psilocybin’s effects were not straightforward. While it didn’t broadly alter sociability, it did have some interesting and unexpected effects. For example, it reduced novelty-seeking behavior in control mice, while in food-restricted mice, it seemed to enhance their motivation to seek food. This suggests that the metabolic state of the individual can significantly influence how they respond to psilocybin (1). Another article on how psilocybin impacts trauma related to eating disorders shows that there is current and relevant applications for psychedelics and eating disorders 

What is the Connection Between Psilocybin, Inflammation, and Social Behavior?

One of the most intriguing findings of the study was the link between psilocybin, inflammation, and social behavior. The researchers found that in exercising mice, psilocybin administration led to a significant increase in the inflammatory marker interleukin-6. What’s more, these elevated levels were positively correlated with a preference for social novelty. This suggests a complex interplay between the immune system, social behavior, and the effects of psilocybin, a connection that is also being explored in the context of trauma and PTSD. For more on this, our blog post on how Ayahuasca may help heal the brain from PTSD is a relevant read.

What Does This Mean for the Treatment of Eating Disorders?

These findings underscore the complexity of developing effective treatments for eating disorders. They suggest that factors such as a person’s metabolic state, exercise habits, and the duration of their illness could all play a role in how they respond to psilocybin-assisted therapy. This highlights the need for a personalized approach to treatment, one that takes into account the unique biological and psychological context of each individual. It also suggests that therapies that address the whole person, including their physical health and lifestyle, may be more effective than those that focus solely on the psychological aspects of the disorder.

Conclusion 

The journey to recovery from an eating disorder is a challenging one, and there is no single treatment that works for everyone. However, the growing body of research into psilocybin-assisted therapy offers hope for new and more effective approaches. By better understanding the complex ways in which psilocybin interacts with the body and mind, we can begin to develop more personalized and effective treatments for these devastating illnesses.

If you are struggling with an eating disorder or other mental health challenges, please know that you are not alone. At Serenity Professional Counseling, we offer a compassionate and evidence-based approach to healing. We can help you navigate the complexities of your condition and find a path toward recovery. To learn more about our services, including Anxiety Treatment and Trauma Therapy, and to schedule a consultation, please visit our contact page.

About the Author

This article was written by Jeff Jones, a Licensed Professional Counselor (LPC) in Texas in practice 27 years. He is a 2024 graduate of the CIIS Center for Psychedelic Therapies and Research program. With a compassionate and evidence-based approach, he helps clients navigate life's challenges and find a path toward healing.

Disclaimer

The information in this article, including discussions of psychedelic-assisted psychotherapy, is for informational purposes only. Psychedelic-assisted psychotherapy has not been approved by all regulatory agencies in the United States, and its safety and efficacy are still being established. This content is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

References

(1) Foldi, C. J., et al. (2026). Psilocybin shows context-dependent effects on social behavior and inflammation in female mice modeling anorexia. Psychedelics. https://www.eurekalert.org/news-releases/1113552

(2) Peck, S. K., et al. (2023). Psilocybin therapy for females with anorexia nervosa. Nature Medicine. https://www.nature.com/articles/s41591-023-02455-9

(3) Bilenker, D., et al. (2025). Psychedelics and the Serotonin Hypothesis of Eating Disorders. International Journal of Molecular Sciences. https://pmc.ncbi.nlm.nih.gov/articles/PMC12384491/