Sleep deprivation linked to brain vessel damage and rapid weight gain

A UK Biobank study of more than 23,000 middle‑aged and older participants found that poor sleep habits – frequent daytime naps, short sleep of six hours or less, and insomnia – were independently associated with greater volume of white‑matter changes, a marker of small‑vessel damage in the brain. These vascular changes are linked to accelerated brain aging and an increased risk of dementia.

A separate experiment by researchers at Columbia University monitored 95 adults who reduced their nightly sleep by about 80–90 minutes for six weeks. Participants gained an average of half a kilogram, spent roughly 17 minutes more per day in sedentary behavior, and showed hormonal shifts that favour appetite. The study suggests that even modest sleep loss can promote weight gain and raise long‑term risks of obesity‑related diseases such as heart disease and type‑2 diabetes.