Sleep and Circadian Rhythms
Cortisol plays a crucial role in our daily rhythm, peaking in the morning to help us wake up and gradually decreasing throughout the day. A mismatch occurs when cortisol levels are low in the morning and high at night, often seen in busy parents and entrepreneurs who stay up late, leading to difficulties in falling and staying asleep. This cycle results in grogginess and reliance on caffeine to start the day, perpetuating the struggle for restful sleep.In this clip
From this podcast

Be Well by Kelly Leveque
118. Prioritizing Hormonal Health with Dr. Carrie Jones
Related Questions
Do cortisol levels upon waking indicate a person's chronotype? My understanding is that "morning" people get a boost of cortisol right before they wake up, while "evening" people get it about 30 minutes after waking up. Does this mean that people are predetermined to be "early birds" or "night owls," or can one's circadian rhythm be changed?
Can waking up too early and being unable to fall back asleep have something to do with the cycle of cortisol in the body throughout the day?