Swiss perspectives in 10 languages

Lunar cycle ‘plays no role’ in mental health

Moon appearing behind a mountain
Theories that the moon affects mental health have abounded since the days of the ancient Egyptians. © Keystone / Anthony Anex

Swiss scientists appear to have debunked a myth that the cycle of the moon can influence our state of mental well-being. A study of thousands of psychiatric patients has found that the moon was in no way to blame for their condition.

Theories linking the lunar cycle to mental health have persisted for thousands of years, dating back to the ancient Egyptian, Assyrian and Babylonian eras. The moon is believed by some to influence the state of mind to such a degree that it can lead to depression and suicidal tendencies.

Researchers at Graubünden Cantonal Hospital, the University Hospital of Zurich and the Albert Einstein College of Medicine in New York decided to put this theory to the test. They compared the medical notes of 17,996 psychiatric patients treated in canton Graubünden between the years 2005-2015 with known lunar cycles in the region.

“The lunar cycles showed no connection with either admission or discharge rates of psychiatric inpatients, nor was there a relationship with the length of stay,” the study, published in the Swiss Medical Weekly, reported.

“Despite the widespread belief that the moon impacts peoples’ mental health and subsequently psychiatric treatment, this study provides no evidence that our celestial neighbour influences our mental well-being.”

News

Two Rothornbahn gondolas cross each other on Lenzerheide on Friday, April 3, 2009.

More

Swiss cable car activity rose in winter 2023-2024

This content was published on In the winter season up to April 2024, railway and cable car operators ferried 3% more visitors compared to the previous winter, and 5% more than the five-year average.

Read more: Swiss cable car activity rose in winter 2023-2024
flooding Rhine

More

Rhine flooding: Swiss to invest CHF1 billion with Austria

This content was published on As part of an international agreement with Austria, the Swiss government wants to pump CHF1 billion ($1.1 billion) into flood protection measures along the Rhine over the next three decades.

Read more: Rhine flooding: Swiss to invest CHF1 billion with Austria

In compliance with the JTI standards

More: SWI swissinfo.ch certified by the Journalism Trust Initiative

You can find an overview of ongoing debates with our journalists here . Please join us!

If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.

SWI swissinfo.ch - a branch of Swiss Broadcasting Corporation SRG SSR

SWI swissinfo.ch - a branch of Swiss Broadcasting Corporation SRG SSR