Cortisol is a hormone your adrenal glands produce that helps govern your circadian rhythm (your body’s internal clock).

Cortisol rises before waking as part of the body’s circadian rhythm, not in response to awakening, challenging previous beliefs. For many years it has been generally accepted that waking up ...

Excessive screen time and chronic stress, especially in young people, disrupt circadian rhythms and immune function, ...

Although light and dark have the most significant influence on your SCN, other factors can also affect your circadian rhythm, such as: Hormones like melatonin and cortisol may increase or decrease ...

Should we all be concerned about our cortisol levels? I took a blood stress test and spoke with experts to find out.

8. Don’t overdo your workouts Excessive exercise can spike cortisol levels, which may contribute to belly fat. Balance ...

Vitamin C may be one of the top potential supplements to reduce cortisol and is readily abundant in several formats. However, ...

Cortisol levels may not be rising just on waking up as previously thought. Rather, they are already on the rise as the body ...

When you hear the word “cortisol,” stress might be the first thing that comes to mind. While it’s true that cortisol is often ...

The findings demonstrate that the major cause of any changes in cortisol around the time of awakening are predominantly related to the endogenous circadian rhythm of cortisol. Furthermore ...

A new study led by the University of Bristol reveals that cortisol levels rise in the hours before waking up, challenging existing beliefs about cortisol's awakening response. The research indicates ...

The findings demonstrate that the major cause of any changes in cortisol around the time of awakening are predominantly related to the endogenous circadian rhythm of cortisol. Furthermore ...