What hormone is increased in our bodies when we are sleep deprived?

When we are sleep deprived, the hormone cortisol is often increased in our bodies. Cortisol, known as the stress hormone, is released in response to stress and low blood sugar levels. Elevated cortisol levels can lead to various negative effects, including impaired cognitive function and increased appetite. Additionally, sleep deprivation can also affect levels of other hormones, such as ghrelin and leptin, which regulate hunger and satiety.