Cortisol, Stress & Body Fat
Straight Answers To The Top 20 Questions
About The "Stress Hormone"
Should you get your cortisol levels tested?
For serious competitive athletes, it may be worth the time, expense and inconvenience to have cortisol tests done on a regular basis. Some strength and conditioning coaches insist on it. For the average trainee, as long as you are aware of the factors that produce excessive cortisol and take steps to keep it in the normal, healthy range, then testing is probably not necessary.
Is cortisol related to abdominal obesity?
Yes. There is a link between high cortisol levels and storage of body fat, particularly "visceral" abdominal body fat (also known as intra-abdominal fat). Visceral fat is stored deeper in the abdominal cavity and around the internal organs, whereas "regular" fat is stored below the skin (known as subcutaneous fat). Visceral fat is particularly unhealthy because it is a risk factor for heart disease and diabetes.
Does Cortisol Make you fat?
No, cortisol is not 'the thing" that makes you fat. In fact, one of the effects of cortisol is to increase the breakdown of stored adipose tissue into glycerol and fatty acids where it can enter the bloodstream and then be used as energy. High levels of cortisol are merely one contributing factor to storage of abdominal fat, not the primary cause. An excess of calories from too much food and not enough exercise is what makes you fat.
If cortisol is related to abdominal obesity, then will taking a cortisol suppressing pill get rid of abdominal (belly) fat?
No. Just because there is an association between high cortisol levels and abdominal body fat doesn't mean that a taking a cortisol-suppressing pill will remove abdominal body fat. The studies which showed a relationship between cortisol and body fat did not test whether suppressing cortisol removes fat that is already deposited on your body.
Does stress make you fat?
No. If it did, then everyone who is stressed would be gaining fat. Many people lose weight while under stress. In some studies, test subjects with the highest cortisol levels lost the most weight. Stress, by itself, does not increase body fat. However, if stress stimulates appetite and leads to overeating, then the excess calories from "stress eating" can make you fatter.
Is cortisol is bad for you?
Cortisol is not "bad for you," it is a hormone that is essential for life as part of our natural stress response. There are many hormones in our bodies, which in the proper amounts, maintain good health, but in excess or in deficiency, have negative effects or even contribute to health problems or diseases. Cortisol is no different. For example, Cushing's syndrome is a disease of high cortisol levels, while Addison's is a disease of low cortisol levels. You want to maintain a healthy, normal level of cortisol, not suppress your cortisol to nothing or allow it to remain elevated.
Chronically elevated cortisol levels may have a variety of negative effects. Cortisol is catabolic and elevated cortisol levels can cause the loss of muscle tissue by facilitating the process of converting lean tissue into glucose. An excess of cortisol can also lead to a decrease in insulin sensitivity, increased insulin resistance, reduced kidney function, hypertension, suppressed immune function, reduced growth hormone levels, and reduced connective tissue strength. Chronically elevated levels of cortisol can also decrease strength and performance in athletes.
Can suppressing cortisol improve your muscle growth and strength?
High cortisol levels can increase muscle protein breakdown and inhibit protein synthesis (building up muscle proteins), so a chronically elevated cortisol level is clearly counterproductive to building muscle. Bringing elevated cortisol levels back to normal may improve recovery, strength, hypertrophy and performance. However, there is no scientific evidence that reducing your cortisol levels below normal will have any effect on increasing strength or muscle growth.
Should you take a cortisol-suppressing supplement to help you lose weight?
In my opinion, no, absolutely not. Cortisol suppressing supplements are not a valid solution for losing weight. The FTC has filed lawsuits against the makers of Cortislim and Cortistress, charging them with making false and unsubstantiated claims that their products can cause weight loss. Lydia Parnes, acting director of the FTC's bureau of consumer protection says, "The defendant's claims fly in the face of reality. No pill can replace a healthy program of diet and exercise." Reducing excessively high cortisol levels through supplement use may prove beneficial in some ways for hard training athletes. However, pills do not make you lose fat. Body fat is lost by creating a caloric deficit through exercise and nutrition.
Should you take a cortisol-suppressing supplement to help control your stress levels?
There are quite a few supplements, mostly herbs, which are reputed to have "calming," "relaxing," "tranquilizing," "stress-relieving" or "anti-anxiety" effects. These include Magnolia bark, kava kava, valerian, L-theanine and too many others to mention. However, very few studies exist which have directly tested the effects of these herbs on cortisol levels. Although some people may find value in these types of products, the ideal solution is to reduce the stress or change your perception of the stress to lessen its physical effects. Treating symptoms does not remove causes. It can be dangerous to "band-aid" the effects of stress while the stress remains in place.
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