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Cortisol - Too much of a good thing…
We’ve all felt that surge of energy as we confront something threatening or startling. A barely avoided car accident. The pressure to meet a deadline. A bear chasing us (obviously some time ago!!).
As your body perceives stress, your adrenal glands make and release the hormone cortisol into your bloodstream. Often called the "stress hormone", cortisol causes an increase in your heart rate and blood pressure. It’s your natural ‘flight or fight’ response that has kept humans alive for thousands of years, running from the bear!
Normal levels of cortisol also are released when you wake up in the morning or when you exercise. These levels can help regulate your blood pressure and blood sugar levels and even strengthen your heart muscle. In small doses, the hormone can heighten memory, increase your immune system and lower sensitivity to pain.
Here’s the problem!!! Our fast-paced culture. Many people are constantly in high-stress mode and if your body experiences chronic stress for too long, you may begin to feel unpleasant and even dangerous effects, such as:
- fatigue
- irritability
- headaches
- intestinal problems, such as constipation, bloating, diarrhoea
- anxiety, depression
- weight gain
- increased blood pressure
- low libido, problems with regular ovulation, menstrual cycle
- difficulty recovering from exercise
- poor sleep
How Cortisol Works
When the adrenal glands release cortisol into your bloodstream, the hormone triggers a flood of glucose that supplies an immediate energy source to your large muscles. It also inhibits insulin production so the glucose won’t be stored but will be available for immediate use. Think being chased by a bear!
Cortisol narrows the arteries, while another hormone, epinephrine, increases your heart rate. Working together, they force your blood to pump harder and faster as you confront and resolve the immediate threat.
Hormone levels return to normal as you swerve to miss that oncoming car, you meet that deadline or the bear finds someone else to chase.
Why Too Much Of A Good Thing Is Bad For You
If your entire life is high-stress and always in high gear, your body may constantly pump out cortisol. This has several negative effects:
- Increased blood sugar levels.
Insulin typically helps the cells convert glucose to energy. As your pancreas struggles to keep up with the high demand for insulin, glucose levels in your blood remain high and your cells don’t get the sugar they need to perform at their best. - Weight gain.
As your cells are crying out for energy, your body may send signals to the brain that you are hungry and need to eat. Studies have demonstrated a direct association between cortisol levels and calorie intake in populations of women. False hunger signals can lead you to crave high-calorie foods, over-eat and thus gain weight. Unused glucose in the blood is eventually stored as body fat. - Suppressed immune system.
Cortisol’s positive action to reduce inflammation in the body can turn against you if your levels are too high for too long. The elevated levels may actually suppress your immune system. You could be more susceptible to colds and contagious illnesses. Your risk of cancer and autoimmune diseases increases and you may develop food allergies. - Digestive problems.
When your body reacts to a threat, it shuts down other less critical functions, such as digestion (think being chased by the bear… we don’t want our digestive system doing anything!). If the high-stress level is constant, your digestive tract can’t digest or absorb food well. It’s no coincidence that ulcers occur during stressful times and people with colitis or irritable bowel syndrome (IBS) report better symptom control when they get their stress under control. - Heart disease.
Constricted arteries and high blood pressure can lead to blood vessel damage and plaque build-up in your arteries. They could be setting the stage for a heart attack or stroke.
How To Take Action
See your doctor if you are having symptoms of chronic stress. There’s a saliva test that can measure the amount of cortisol in your system, or your doctor may have other ideas about what’s causing your symptoms.
Source: www.PremierHealth ›