Depriving a rat of sleep causes it to develop diabetes within approximately one month.
"Yeah, if you take a rat and deprive it of sleep, it'll get diabetes within a matter of a month or so." (said at 1:05:49)
Experimental studies in rodents show that chronic sleep restriction or rapid eye movement (REM) sleep deprivation over 3 to 5 weeks (approximately one month) induces metabolic disruptions, including impaired glucose tolerance, insulin resistance, elevated blood glucose, and pancreatic tissue stress. However, these changes represent glucose intolerance and insulin resistance (pre-diabetic metabolic alterations) rather than the development of overt diabetes mellitus. Furthermore, other rodent models of chronic partial sleep restriction have failed to induce metabolic syndrome or elevated insulin/glucose levels.
- contradicts: Metabolic effects of chronic sleep restriction in rats. (Sleep 2012)
"Chronic partial sleep loss did not lead to obesity or metabolic syndrome in rats. This finding raises the question whether adverse metabolic outcomes associated with chronic partial sleep loss in humans may be due to factors other than short sleep, such as circadian disruption, inactivity, or diet during the additional waking hours." (abstract, conclusions, passage verified)
pubmedfull study (doi) - partial: Prolonged REM sleep restriction induces metabolic syndrome-related changes: Mediation by p… (Brain, behavior, and immunity 2015)
"The present results indicated that 21days of sleep restriction by the platform method induced metabolic syndrome-related alterations that may be mediated by inflammation of the RPAT." (abstract, results, passage verified)
pubmedfull study (doi) - partial: Impact of chronic REM sleep deprivation on glucose homeostasis, insulin sensitivity, oxida… (Sleep medicine 2026)
"After REM-SD, rats exhibited glucose intolerance and also developed increased insulin sensitivity. Elevated plasma glucose levels, plasma levels of CORT, LDH, markers of oxidative stress, and decreased plasma levels of BuChE, as well as impaired hepatic and pancreatic function, confirmed by significant histopathological changes, were observed. Ticking together, these modifications and alterations in physiologic mechanisms induced by CSD lead to hyperglycemia, glucose intolerance, and insulin resistance." (abstract, results, passage verified)
pubmedfull study (doi)