Harvard Med - Sleep and Health
Not getting enough sleep alters insulin resistance, which is associated with an increased risk of developing type 2 diabetes, and that can be very quickly induced by a single night's total sleep loss.
Dr. Ann E. Rogers
The Takeaway
It can be tempting to trade sleep for a few precious hours of wakefulness, but it is important to consider the hidden costs. Sleep is precious, too.
Numerous studies have found that insufficient sleep increases a person's risk of developing serious medical conditions, including obesity, diabetes, and cardiovascular disease.
Lack of adequate sleep over time has been associated with a shortened lifespan.
Source: https://healthysleep.med.harvard.edu/need-sleep/whats-in-it-for-you/health