Side‑sleeping—especially on your side—is currently considered the best position for brain waste clearance, based on animal research and preliminary human observations.
[left-side sleeping may be better for digestion and could reduce acid reflux symptoms. On the other hand, right-side sleeping might be more comfortable for those with heart conditions or sleep apnea]
Sleeping on your back (supine) may be associated with slower glymphatic clearance and higher Alzheimer’s-related risk markers, according to observational data
https://pmc.ncbi.nlm.nih.gov/articles/PMC4524974/?utm_source
https://pubmed.ncbi.nlm.nih.gov/26245965/
https://journals.sagepub.com/doi/full/10.1177/0271678X20982388?utm_source=chatgpt.com
https://www.health.com/sleeping-on-your-back-may-increase-your-risk-for-alzheimer-s-disease-8715735?utm_source=chatgpt.com
https://healthsciencereviews.com/2021/10/04/how-does-your-sleeping-position-affect-your-glymphatic-system/?utm_source
https://www.verywellhealth.com/prone-vs-supine-7096772?utm_source
Although hypotheses linking sleep position to Alzheimer’s risk remain tentative, current evidence suggests side‑sleeping supports better glymphatic clearance, while back‑sleeping is observed more frequently in people with Alzheimer’s-like conditions. There’s no definitive proof yet, but it’s an intriguing area of early research.