Can Insulin help with Schlaf?

Insulin is primarily a blood-glucose-regulating hormone, not a sleep aid. There is some mechanistic evidence that insulin can promote sleep via central nervous system effects (e.g., intranasal insulin may inhibit orexin neurons), but clinical data are limited and inconsistent. Using insulin without a medical indication (e.g., diabetes) is dangerous because it can cause severe hypoglycemia, leading to coma or death. For people without diabetes, insulin does not reliably improve sleep and carries significant risks. If you have sleep issues, focus on proven approaches: sleep hygiene, stress reduction, and medical evaluation for disorders like sleep apnea. The claim that insulin helps with sleep is not supported by strong evidence and should not be acted upon. Evidence: mechanistic, but clinically insufficient.