2005 study in the Journal of Applied Physiology
Nocturnal glucose levels are low and stable since there is lower muscle and brain requirements
Shorter sleep duration, disturbed sleep or inability to reach deep sleep have been show to lead to increased:
- Blood glucose
- Insulin levels
- Leptin
- Hunger
And the effect extends to the next day.
While diet is extremely important in metabolic diseases, other factors should also be optimized.
Reference: Sleep loss: A novel risk factor for insulin resistance and Type 2 diabetes