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You may have heard that cortisol and stress levels are related, but there are so many misconceptions around the how, what, where and why of their connection.
We asked Psychologist, Dr Bronwyn Coward to help us gain a better understanding of this important hormone and its role in the stress response.
“When we are stressed, a part of the brain called the hypothalamus releases cortisol to tell the body that there is a threat and assists with the fight or flight response,” says Dr Bronwyn.
So, what exactly is cortisol?
Cortisol is a hormone that’s released via the adrenal gland in response to stress.
“The trigger could be anything from a work deadline to taking care of family, having a bird swoop you or seeing a large dog,” explains Dr Bronwyn.
Cortisol is released as a stress response to assist the body in tackling the event, increased stress equals increased cortisol.
The purpose of this? To assist your body’s stress response to help you respond appropriately in a dangerous situation.
Your hypothalamus – which is a small region of the brain that’s located where the back of your neck meets your head – sends a message to the adrenal gland via the pituitary gland.
Then, your adrenal gland releases cortisol and other hormones, including adrenaline, to help your body prepare to overcome challenges – like meeting a deadline or being attacked by a bear.
The cortisol encourages your body to jump into stress-fighting mode by:
In modern life, our challenges are often less bear-attack related. But physically, our body still reacts in the same way.
This is why doctors refer to the effects of stress on the body – stress instantly activates a physical response.
Cortisol is a hormone that’s released via the adrenal gland in response to stress.
When it comes to cortisol and stress levels, some people falsely believe that cortisol causes stress. But Dr Bronwyn explains it actually works the other way around.
“Cortisol is released as a stress response to assist the body in tackling the event, increased stress equals increased cortisol,” she says.
It’s normal for your cortisol levels to fluctuate during the day. Generally, cortisol levels are at their highest in the morning and lowest around midnight as they decrease over the course of the day.
“Cortisol plays a valuable part in regulating sleep,” explains Dr Bronwyn.
Your body follows a sleep-wake rhythm over 24 hours, and the production of cortisol also follows a similar pattern. These patterns are both regulated by something called the hypothalamic-pituitary-adrenal axis (or HPA axis for short) which helps with:
If you’re curious about mindfulness, maybe try some daily positive affirmations, deep breathing and meditation.
Dr Bronwyn believes that “the human body will usually produce the correct amount of cortisol.”
Generally, unless you have a condition where the balance of cortisol could be disrupted or there’s been long-term activation of the stress response system, your body should be creating the right amount.
If you do feel like something is amiss and want to know how to lower your cortisol levels, contact your health professional for guidance.
Knowing that exercise helps us combat stress is something that we can use to our advantage. Here are 5 types of exercise that will support our nervous system.
There’s been some interesting research on this topic. A review of 209 studies suggests mindfulness-based therapy could be useful to help address a variety of psychological challenges – which could in turn help improve mental wellbeing.
And because we know that cortisol release is triggered by stress, and one of the benefits of mindfulness is that it reduces stress, mindfulness may possibly help reduce cortisol levels.
So, if you’re curious about mindfulness, maybe try some daily positive affirmations, deep breathing and meditation.
Maintaining a healthy and balanced lifestyle and diet is beneficial for overall physical and mental wellness.
Dr Bronwyn says there aren’t any specific foods that reduce cortisol but maintaining a healthy and balanced lifestyle and diet is beneficial for overall physical and mental wellness. So, it might be worthwhile adding some mood-boosting foods to your plate.
When it comes to exercise, Dr Bronwyn explains that regular exercise is a great way to help manage stress.
In fact, research has found physical exercise training could potentially support changes in cortisol levels in healthy individuals. As a 2017 review of five studies indicated, physical exercise may promote a reduction in cortisol levels in people with reduced mental wellbeing. However, the researchers found that this cortisol reduction could be influenced by:
It’s incredible how well our bodies have evolved to thrive under pressure. We’re lucky in Australia that our stress levels are more likely to be impacted by a work deadline than something like a bear attack. Even if your body gets confused between the two and releases cortisol anyway.
Related:
Dr Bronwyn Coward is a registered Psychologist, an endorsed Clinical Neuropsychologist and an AHPRA board-approved supervisor who draws on over a decade of experience to bring solution-based assessments to her clients.
Reviewed by the healthylife Advisory Board April 2022.