Why the Internet Is Blowing Up About Cortisol
And Why We Need to Stop Demonizing It
If you’ve spent any time on TikTok or Instagram lately, you’ve probably heard about “cortisol face,” “cortisol belly,” cortisol detoxes, cortisol cocktails, and the endless list of things supposedly “spiking your cortisol.”
Cortisol has essentially become the newest hormone to blame for everything from stubborn weight gain and poor sleep to fatigue, anxiety, inflammation, and facial puffiness.
And there is some truth buried underneath the trend.
Chronic stress can absolutely affect our health.
But cortisol itself is not the villain.
In fact, you cannot live without cortisol.
The problem isn't that your body produces cortisol. The question is whether your stress-response system is appropriately responding to the demands being placed on your body, and then returning to baseline.
First: What Is Cortisol?
Cortisol is a steroid hormone produced by the adrenal glands as part of the hypothalamic-pituitary-adrenal, or HPA, axis. Although we commonly call cortisol the “stress hormone,” that's only one part of its job.
Cortisol helps:
Regulate blood glucose and energy availability
Maintain blood pressure
Regulate inflammation and immune activity
Influence metabolism
Support your sleep-wake cycle
Mobilize energy during exercise
Help your body respond to illness, injury and psychological stress
Your cortisol level is also supposed to change throughout the day.
For most people, cortisol rises toward morning, helping us wake up, become alert and mobilize energy for the day. Levels gradually decline as the day progresses and are typically much lower around bedtime.
So when someone tells you that you need to “lower your cortisol,” that's not necessarily the goal.
You need cortisol. You just want it showing up appropriately at the right time of day.
Why Did Cortisol Suddenly Become the Internet's Favorite Villain?
Because cortisol offers a very appealing explanation for a complicated problem.
People are exhausted, gaining weight, sleeping poorly, overwhelmed, experiencing digestive problems, cravings, anxiety, brain fog and changes in their menstrual cycles.
And then social media provides one beautifully simple explanation:
“It's your cortisol.”
Even better, someone usually has a supplement, powder, test, detox or “cortisol cocktail” to sell you immediately afterward.
Researchers presenting at the Society for Endocrinology's 2026 meeting recently examined social-media hormone content and found widespread oversimplification and misinformation, including cortisol being portrayed as the root cause of belly fat, fatigue and poor performance, frequently alongside marketing for supplements.
Cleveland Clinic physicians have similarly cautioned against the reductionist idea that cortisol alone explains weight gain or that simply lowering cortisol will cause weight to fall.
“Cortisol Belly” and “Cortisol Face” Aren't Diagnoses
This is where an important distinction needs to be made.
Can genuinely excessive cortisol change body composition?
Absolutely.
Pathologically elevated cortisol occurs in conditions such as Cushing syndrome and can cause central weight gain, facial rounding, high blood pressure, elevated blood glucose, muscle weakness, easy bruising and characteristic stretch marks.
But that is very different from looking in the mirror after a stressful week and diagnosing yourself with “cortisol face.”
Likewise, abdominal weight gain isn't automatically “cortisol belly.”
Body composition is influenced by an enormous number of factors, including nutrition, insulin sensitivity, thyroid function, sex hormones, sleep, activity level, muscle mass, genetics, medications, inflammation, age and energy balance.
Stress physiology can certainly be part of that picture.
It's rarely the entire picture.
A Cortisol Increase Isn't Automatically Bad
Here's another piece social media frequently misses:
Healthy things can increase cortisol.
Exercise can increase cortisol.
Waking up increases cortisol.
Fasting can increase cortisol.
Low blood sugar can stimulate cortisol.
Being sick can increase cortisol.
Public speaking can increase cortisol.
Running a marathon definitely increases cortisol.
Your body isn't malfunctioning when this happens.
It's adapting.
Imagine you're hiking and suddenly encounter a bear.
Your body doesn't need a chamomile tea and a cortisol-lowering supplement.
It needs energy.
Your stress-response system mobilizes glucose, increases cardiovascular activity and temporarily shifts resources toward immediate survival.
That's an extraordinarily useful biological system.
The problem arises when the body experiences persistent stress without adequate recovery.
The Better Question: Why Does Your Body Think It Needs a Stress Response?
Instead of asking:
“How do I lower my cortisol?”
A more useful question may be:
“What is repeatedly asking my body to produce a stress response?”
And this is where the conversation becomes much more interesting.
Stress isn't exclusively psychological.
Your body can experience physiological stress from:
Inadequate sleep
Undereating or aggressive calorie restriction
Blood-sugar instability
Excessive exercise without recovery
Illness or infection
Chronic pain
Inflammation
Nutrient deficiencies
Significant emotional stress
Shift work or circadian disruption
Excessive stimulant use
Your brain doesn't necessarily separate these stressors into neat categories. It responds to the demands being placed on the body. That means telling an exhausted person to simply “stress less” may completely miss what is happening physiologically. In the 21st century, it’s difficult to find any person who isn’t experiencing a modest amount of stress.
Cortisol Is the Messenger, Not the Problem
This is perhaps the biggest shift we need to make in the cortisol conversation.
Imagine the fire alarm in your house starts going off. You could certainly solve the noise problem by smashing the alarm. But you'd probably be better off figuring out whether the kitchen is on fire.
Cortisol can work similarly.
If your stress-response system is repeatedly being activated, our goal shouldn't necessarily be to indiscriminately suppress cortisol.
We should be asking:
What is driving the signal?
Are you sleeping five hours a night?
Or eating 1,200 calories while exercising intensely six days a week?
Are you deficient in iron or another important nutrient?
Living off of caffeine?
Dealing with chronic pain?
Experiencing significant psychological stress?
Or maybe several of these things are happening simultaneously.
Addressing those underlying stressors makes considerably more sense than simply purchasing the newest supplement promising to “flush cortisol.”
Low Cortisol Isn't the Goal
This part tends to get lost entirely online.
Too little cortisol can also be dangerous.
True adrenal insufficiency can cause significant fatigue, weakness, weight loss and low blood pressure and requires medical evaluation and treatment.
The goal isn't LOW cortisol, but appropriate cortisol regulation. We want cortisol to rise when we need energy and alertness and the proper stress response to activate when there's actually a threat.
After a threat the system needs to be capable of settling back down.
That flexibility is far more meaningful than trying to keep one hormone permanently suppressed.
So How Do We Support Healthy Cortisol Regulation?
Ironically, the basics aren't particularly glamorous.
Prioritize adequate sleep.
Eat enough food to support your activity level.
Consume adequate protein and micronutrients.
Build and maintain muscle.
Exercise regularly and incorporate adequate recovery.
Get outside and support a normal circadian rhythm.
Reduce excessive stimulant use when appropriate.
Address nutrient deficiencies.
Treat underlying medical conditions.
Develop tools for managing genuine psychological stress.
And create periods during your day when your nervous system isn't constantly being asked to respond to another demand.
None of those strategies “detox” cortisol.
They help create an environment where your body's stress-response system can function the way it was designed to function.
Cortisol Can Look Different in Men and Women
Cortisol physiology isn't identical between men and women, largely because the HPA stress axis interacts with sex hormones. Interestingly, healthy men and women often have fairly similar baseline cortisol levels, while differences become more apparent in how cortisol responds to particular stressors, and research doesn't support the simplistic idea that women universally have “higher cortisol.” In women, estrogen and progesterone can modify HPA-axis activity, meaning stress responsiveness may shift across the menstrual cycle and also change during pregnancy, postpartum, perimenopause and menopause; a large meta-analysis found small differences in basal cortisol across menstrual-cycle phases. Testosterone also interacts with HPA-axis signaling in men and may influence stress reactivity.
This is why addressing “cortisol” shouldn't look exactly the same for everyone, or simply mean trying to lower it. For both men and women, start with the fundamentals: adequate sleep and nutrition, appropriate exercise and recovery, stable circadian rhythms, and identifying physiological or psychological sources of chronic stress. For women, it can also be valuable to consider menstrual-cycle patterns, pregnancy/postpartum status, hormonal contraception and the perimenopausal transition when symptoms fluctuate predictably with hormonal changes. For men, testosterone status, sleep quality, metabolic health, training load and recovery may be relevant pieces of the larger picture. The goal in either sex isn't low cortisol; it's an appropriately responsive HPA axis that can activate when needed and recover afterward.
When Cortisol Actually Deserves Medical Investigation
There is an important difference between being chronically stressed and having a true cortisol disorder.
If someone develops significant unexplained central weight gain accompanied by symptoms such as muscle weakness, easy bruising, wide purple stretch marks, high blood pressure, abnormal blood glucose or pronounced facial rounding, that deserves medical evaluation rather than a TikTok cortisol protocol.
Likewise, significant unexplained fatigue, weight loss or low blood pressure may warrant investigation for inadequate cortisol production.
Cortisol testing also isn't as simple as ordering one random morning cortisol and declaring yourself “high cortisol.”
Because cortisol naturally changes throughout the day, endocrinologists may use specific testing approaches, including late-night salivary cortisol, 24-hour urinary cortisol or dexamethasone suppression testing, when evaluating suspected cortisol excess.
Testing should answer a clinical question.
Cortisol Isn't Your Enemy
The internet loves villains.
Fat was once the villain.
Then carbohydrates.
Then insulin.
Now cortisol.
Human physiology isn't that simple.
Cortisol is not a toxin that needs to be detoxed. It's an essential hormone your body uses every single day to keep you alive.
Chronic stress matters.
Sleep matters.
Metabolic health matters.
Nutrient status matters.
Nervous-system regulation matters.
And abnormal cortisol production/regulation absolutely exists.
But instead of becoming afraid of cortisol, we should become curious about why the body is activating its stress-response system in the first place.
The goal isn't to eliminate stress hormones.
It's to build a body that can appropriately respond to stress, and recover when the stress is over.
That is a much better definition of resilience.
Consider working with one of our providers to assess your cortisol levels, or begin adding tools to help manage healthy cortisol response.
References
Nieman LK, Biller BMK, Findling JW, et al. The diagnosis of Cushing's syndrome: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. 2008;93(5):1526–1540. doi:10.1210/jc.2008-0125.
Endocrine Society. Diagnosis of Cushing's Syndrome Guideline Resources. Clinical Practice Guidelines. The Endocrine Society.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Adrenal Insufficiency & Addison's Disease. National Institutes of Health.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Diagnosis of Adrenal Insufficiency & Addison's Disease. National Institutes of Health.
Anderson T, Wideman L. Exercise and the cortisol awakening response: A systematic review. Sports Medicine - Open. 2017;3:37. doi:10.1186/s40798-017-0102-3.
Bale TL, Epperson CN. Sex differences and stress across the lifespan. Nature Neuroscience. 2015;18:1413–1420.
Goel N, Workman JL, Lee TT, Innala L, Viau V. Sex differences in the HPA axis. Comprehensive Physiology. 2014;4(3):1121–1155.
Klusmann H, et al. HPA axis activity across the menstrual cycle—a systematic review and meta-analysis of longitudinal studies. Frontiers in Neuroendocrinology. 2022;66:100998.