What research shows about mantra and meditation
Three studies, what each one found, and what none of them can tell you.

Practices like mantra and meditation have been studied. The results are real and specific, and they are smaller than the claims you will often read. Here are three studies, stated plainly.
Mantra and heart rhythm (BMJ, 2001)
Recited mantra slowed breathing to about six breaths a minute and raised baroreflex sensitivity. It does not show effects specific to any one mantra.
Meditation programmes (JAMA Internal Medicine, 2014)
Across 47 trials, there was moderate evidence of reduced anxiety and depression. It does not show spiritual or supernatural effects.
Lunar cycle and sleep (Science Advances, 2021)
Sleep onset shifted later in the nights before a full moon. It does not show the Moon determining events.
Practise because the practice is worth doing. Use research to understand it, not to oversell it.
Draft explainer, awaiting the author's review before publication.

