A phase of sleep may be connected to a lower risk of 83 diseases, according to reporting by Estadão. The Brazilian outlet published the finding on September 23, 2026, describing the link between that sleep stage and reduced disease risk.
Several other publications carried the same study. TNH1 reported that sleeping better lowers the risk of 83 conditions. NC News described REM sleep specifically as being associated with a lower risk of the same number of diseases. Metrópoles framed the finding around sleep quality, reporting that it influences the risk of more than 80 diseases. HealthNews reported that both REM sleep and deep sleep are associated with a lower risk of disease.
Across these accounts, the common thread is that the study examined how sleep relates to health outcomes across a broad set of conditions, with the number 83 recurring in the coverage. The reports point to REM sleep, and in one case deep sleep as well, as the stages drawing attention.
The coverage does not, in the material available, specify the study's authors, the institution behind it, the population studied, or how the 83 diseases were selected and grouped. It also does not state whether the findings show causation or only an association. Those details would matter for judging how much weight the result should carry.
What to watch next: whether the full study is released with its methodology, and whether independent researchers confirm the pattern.
