Stress Hormones Explained: Cortisol, Adrenaline and What Chronic Stress Does Over Years

Scroll for ten minutes and you will meet the puffy-cheeked selfie labeled “cortisol face,” the morning glass of orange juice and salt sold as a “cortisol cocktail,” and a mailed-in saliva kit promising to reveal whether your stress hormones are “dysregulated.” As of this writing in 2025, searches for cortisol have climbed steadily for two years, pushed by social video rather than by any new trial or guideline. The science underneath is genuinely interesting. The claims stacked on top of it mostly are not.

Here is what is true. Cortisol and adrenaline are ancient, elegant chemistry, tuned to get a mammal out of a ravine and then stand down. They are not toxins to flush, and a single measurement rarely tells you much about your life.

What deserves attention is slower and quieter: what happens to blood vessels, sleep, appetite and mood when the alarm never fully switches off. That story has decades of evidence behind it, and it is the one worth reading to the end.

What are stress hormones, and why is everyone suddenly measuring them?

A stress hormone is any chemical the body releases in response to a perceived threat to help it cope. Two dominate the conversation. Adrenaline, also called epinephrine, is the fast one: it comes from the center of the adrenal glands, the two small organs that sit on top of each kidney, and it acts within seconds. Cortisol is the slow one, made in the outer layer of the same glands and reaching full effect over roughly twenty to thirty minutes.

Both belong to a system that evolved for sprints, not marathons. A near miss in traffic, a presentation, a child’s fever at 2 a.m.: the hormones rise, the body does something useful with the energy, and levels fall back within an hour or two. Cleveland Clinic describes cortisol as a hormone that touches nearly every organ, which is exactly why it cannot be judged by a single number.

The current wave of interest has a recognizable shape. Social media compressed a complex endocrine system into a villain, cortisol, and a solution, usually a supplement, a drink or a home test. The appeal is understandable. Stress is real, it is common, and a measurable culprit feels more tractable than a demanding job or a thin bank balance.

The evidence supports a more useful framing. Stress hormones are the messengers, not the message. When they stay elevated for years, the cause is almost always upstream: chronic workload, caregiving, poor sleep, financial strain, discrimination or untreated anxiety. Measuring the messenger without addressing the message rarely changes anything, and the rest of this piece explains what does.

What changed recently in the stress hormone conversation

Nothing in the underlying biology changed. What shifted is who is talking about it and how loudly, so it helps to pin down the dated facts.

In January 2021 the American Heart Association published a scientific statement concluding that psychological health, including chronic stress, is a meaningful contributor to cardiovascular risk and that clinicians should assess it. That was a formal shift: stress moved from “soft” factor to a named part of heart health guidance. The association’s consumer page on stress and heart health reflects that position.

In February 2023 the World Health Organization published a question-and-answer resource on stress, defining it as a state of worry or mental tension caused by a difficult situation and emphasizing that everyone experiences it to some degree. The WHO framing is deliberately non-medicalizing, which matters when social media medicalizes every bad week.

Mayo Clinic’s explainer on chronic stress, revised in August 2023, lists the long-term consequences the evidence supports: anxiety, depression, digestive problems, headaches, muscle tension, sleep problems, weight gain, and problems with memory and focus. Harvard Health updated its description of the stress response in 2024, keeping the same core message that repeated activation, not the response itself, is the concern.

Against that steady, cautious institutional voice, 2024 and 2025 brought the viral layer: “cortisol face,” “cortisol belly,” adrenal cocktails and direct-to-consumer saliva kits. None of these were prompted by a trial or an approval. They were prompted by algorithms. The gap between the two conversations is the reason this explainer exists.

What are the 5 stress hormones people search for?

Search engines love the number five, and the body roughly obliges. Several lists circulate; the one that matches endocrinology textbooks runs like this.

• Corticotropin-releasing hormone (CRH) starts the cascade. The hypothalamus, a thumb-sized region at the base of the brain, releases it when it senses threat.
• Adrenocorticotropic hormone (ACTH) is the relay. The pituitary gland, just below the hypothalamus, releases ACTH into the blood to tell the adrenal glands to make cortisol.
• Cortisol is the main glucocorticoid, a class of hormones that raise blood sugar and shape immune activity. It mobilizes fuel, sharpens short-term focus and dampens inflammation.
• Adrenaline (epinephrine) speeds heart rate, opens airways, dilates pupils and shunts blood toward muscles.
• Noradrenaline (norepinephrine) is adrenaline’s close relative. It works both as a hormone in the blood and as a neurotransmitter in the brain, raising alertness and tightening blood vessels.

Adrenaline and noradrenaline together are called catecholamines, a chemical family that acts fast and clears fast. CRH, ACTH and cortisol form the hypothalamic-pituitary-adrenal axis, usually shortened to the HPA axis, which acts slower and lingers longer.

Some lists add vasopressin, which conserves water and nudges ACTH release, or prolactin and growth hormone, which also rise under acute stress. Others count the gut hormone ghrelin because it climbs with stress and stimulates appetite. These are honest additions, but the five above do the heavy lifting, and understanding the two-speed design, catecholamines in seconds and the HPA axis in minutes, explains almost everything that follows.

How the stress response works, from first alarm to recovery

Picture a dog lunging at a fence as you pass. Before you consciously register it, the amygdala, an almond-shaped alarm center deep in the brain, fires a signal to the hypothalamus. The hypothalamus activates the sympathetic nervous system, the branch of the involuntary nervous system that accelerates the body. Nerve signals reach the adrenal medulla, the gland’s core, and adrenaline floods the bloodstream.

Within seconds your heart rate jumps, perhaps from 70 to 110 beats a minute. Blood pressure rises. Airways widen so each breath carries more oxygen. The liver releases stored glucose. Blood moves away from the gut and skin toward large muscles, which is why hands go cold and stomachs flip. This is the fight-or-flight response, and Harvard Health notes it is so well engineered that the body starts it before the visual centers have fully processed what is happening.

If the threat persists beyond a minute or two, the second system engages. The hypothalamus releases CRH, the pituitary responds with ACTH, and the adrenal cortex, the gland’s outer layer, secretes cortisol. Cortisol keeps glucose available, holds blood pressure up, and tempers the inflammation that adrenaline would otherwise provoke. It also feeds back on the hypothalamus and pituitary, telling them to ease off. That negative feedback loop is the body’s own brake.

Recovery is handled by the parasympathetic nervous system, the calming branch, often summarized as “rest and digest.” Heart rate slows, digestion resumes, cortisol drifts down over an hour or two.

Everything healthy about this system depends on the brake working. The trouble in chronic stress is not that the alarm sounds. It is that it sounds daily, the feedback loop gets sluggish, and the body spends years in a half-braced posture it was never designed to hold.

Cortisol vs adrenaline: how the two main stress hormones differ

People use the two names interchangeably, and the body does not. One is a sprinter, the other a distance runner, and their differences shape what chronic stress actually does.

Feature	Adrenaline (epinephrine)	Cortisol
Where it is made	Adrenal medulla (inner core)	Adrenal cortex (outer layer)
Chemical family	Catecholamine	Glucocorticoid (steroid)
Trigger pathway	Direct nerve signal from the sympathetic nervous system	Hormone relay: CRH, then ACTH, then cortisol
Speed of action	Seconds	Peaks about 20–30 minutes after a stressor
How long it lingers	Cleared from blood within a few minutes	Falls over 1–2 hours; has a built-in daily rhythm
Main jobs	Raises heart rate and blood pressure, opens airways, releases glucose	Keeps glucose available, sustains blood pressure, regulates immunity and inflammation
What you feel	Pounding heart, shaky hands, dry mouth, heightened senses	Little in the moment; over time, altered sleep, appetite and mood
Medical excess	Pheochromocytoma (rare adrenal tumor)	Cushing syndrome
Medical deficiency	Rare in isolation	Addison’s disease, adrenal insufficiency

The practical lesson sits in the speed rows. Because adrenaline clears within minutes, it is almost never the problem in chronic stress; you cannot hold an adrenaline surge for a year. Cortisol can stay modestly elevated for years, and it reaches receptors in fat tissue, bone, brain and immune cells. When researchers talk about the long-term toll of stress hormones, they are mostly talking about cortisol and the sympathetic nervous system’s background tone, not dramatic adrenaline rushes.

What cortisol does on an ordinary, unstressed day

Cortisol is not a stress-only hormone, and this is the single most misunderstood fact in the viral conversation. Even on a calm beach holiday, cortisol follows a strong daily rhythm. Levels begin rising in the last hours of sleep, surge in the first 30–45 minutes after waking (a pattern called the cortisol awakening response), then decline through the afternoon to a low point around midnight.

That morning rise is what gets you upright. It raises blood sugar so the brain has fuel, nudges blood pressure up from its overnight low, and shifts immune activity toward a daytime pattern. Cleveland Clinic’s summary lists its routine roles: regulating the body’s use of carbohydrates, fats and proteins, controlling blood pressure, suppressing inflammation, and helping regulate the sleep-wake cycle.

The rhythm also explains why “my cortisol is high” is often a meaningless phrase without a timestamp. A value drawn at 8 a.m. may be three or four times a value drawn at 10 p.m. in the same healthy person. Shift workers, people with jet lag and new parents can have a flattened or shifted curve without any disease.

The glucocorticoid receptor, the docking site through which cortisol acts, sits in nearly every cell type. In the hippocampus, the brain’s memory hub, cortisol at normal levels supports learning; at persistently high levels it appears to impair it in animal studies and some human imaging research. In fat cells, especially around the abdomen, receptors are dense, which is one proposed reason chronic stress is linked to central weight gain.

So the goal is never “low cortisol.” The goal is a healthy curve: a brisk morning peak, a clean evening fall, and a system that answers a real threat and then stands down.

Chronic stress effects over years: what the body actually pays

Researchers use the term allostatic load for the cumulative wear of repeatedly activating and failing to switch off the stress response. It is a useful image: a thermostat that cycles so often the furnace never cools.

Heart and blood vessels. The strongest evidence sits here. Large pooled analyses of European workers found that people reporting high job strain had roughly 20 percent higher rates of coronary heart disease over about seven years than those without it, after accounting for smoking and other factors. The American Heart Association’s 2021 statement treats chronic stress as a contributor to high blood pressure, arterial inflammation and unhealthy coping such as smoking and inactivity.

Metabolism. Cortisol raises blood glucose and promotes storage of fat around the organs. Observational cohorts link chronic stress with larger waist circumference and higher rates of type 2 diabetes, though lifestyle changes under stress explain part of the association.

Immune system. Short-term cortisol suppresses inflammation. Over years, immune cells can become less responsive to it, a phenomenon called glucocorticoid receptor resistance, so inflammation runs higher rather than lower. A well-known study exposing volunteers to a cold virus found those under prolonged stress were more likely to develop symptoms.

Brain and mood. Chronic stress is a consistent risk factor for depression and anxiety disorders, and imaging studies associate it with changes in the hippocampus and prefrontal cortex, the planning region behind the forehead.

Sleep, gut and skin. Mayo Clinic’s list adds digestive problems, headaches, muscle tension and sleep disruption. Flares of eczema, psoriasis and acne under stress are well documented, mediated partly by cortisol and partly by nerve signaling in the skin.

Chronic stress effects are real and measurable. They are also gradual, which is why they are easy to attribute to aging, and why the next section matters.

What the evidence actually says, graded by strength

Not every claim in the previous section carries the same weight. A seasoned reader should know which are built on randomized trials, which on observation, and which on expert reasoning.

Strong, consistent observational evidence. The link between chronic psychosocial stress and cardiovascular disease rests on dozens of prospective cohorts, meaning large groups followed forward in time, totaling hundreds of thousands of people. Associations with depression and anxiety are similarly robust. Observational studies cannot prove cause, but consistency across countries, dose-response patterns and plausible mechanisms make causation likely. The AHA statement calls the evidence sufficient to act on.

Moderate evidence. Links to abdominal weight gain, type 2 diabetes and impaired immune response are supported by cohorts plus small experimental studies, such as viral challenge experiments. Confounding by sleep loss, diet and alcohol is hard to remove.

Experimental but limited. Randomized trials show that mindfulness-based programs, cognitive behavioral therapy and aerobic exercise reduce perceived stress and, in many but not all trials, produce modest reductions in cortisol or its reactivity. Effect sizes on hormones are small, and trials are often short and under 100 participants.

Mechanistic and animal research. Hippocampal shrinkage, receptor resistance and most “cortisol rewires the brain” headlines originate in rodent studies or small imaging cohorts. Biologically compelling, but not a basis for individual claims.

Expert opinion or weaker. The idea that a single salivary cortisol value, a hair sample or a facial appearance can diagnose a stress problem in an otherwise healthy person has no supporting trial. Cortisol-lowering supplements have small, short industry-funded trials at best.

The honest summary: the harm of years of unmanaged stress is well established; the tools for measuring it in individuals are weak; the interventions that help work mostly through behavior and brain, not by directly “lowering” a hormone.

Can low cortisol levels be caused by stress?

This question usually arrives wrapped in the phrase “adrenal fatigue,” the popular idea that years of stress exhaust the adrenal glands until they cannot keep up. The theory is intuitive. It is also not a recognized medical diagnosis, and systematic reviews have found no consistent evidence that the adrenal glands tire out in this way. Mayo Clinic and Cleveland Clinic both state that adrenal fatigue is not an accepted condition.

What chronic stress can do, in some people, is flatten the daily cortisol curve: a blunter morning peak and a higher evening level, so the average may look ordinary while the rhythm is off. Research in people with post-traumatic stress disorder and in some with burnout and chronic fatigue has found lower-than-expected cortisol or exaggerated feedback sensitivity in subgroups. These findings are real but inconsistent, and they do not translate into a diagnostic test or a treatment.

Genuinely low cortisol has specific medical causes that deserve to be taken seriously. Addison’s disease, in which the immune system damages the adrenal cortex, produces fatigue, weight loss, low blood pressure, salt craving, nausea and often a bronze darkening of the skin, according to the NHS. Secondary adrenal insufficiency occurs when the pituitary fails to send enough ACTH, sometimes after pituitary surgery or a tumor. Another important cause is stopping long-term steroid medicines abruptly, because the body’s own production has been suppressed. Anyone taking prescribed steroids should never alter or stop them without their prescribing clinician’s guidance.

The distinction matters because the symptoms of adrenal insufficiency overlap with ordinary exhaustion. If fatigue comes with unexplained weight loss, dizziness on standing, vomiting or darkening skin, the right step is a doctor and a proper blood test, not an online quiz.

How to check cortisol levels, and when a test makes sense

Cortisol can be measured in blood, saliva, urine and hair. Each answers a different question, and none answers the one most people are asking.

Blood test. Usually drawn early in the morning, when levels should be at their peak. MedlinePlus explains that an abnormal morning value is a screen for conditions such as Cushing syndrome (too much cortisol) or Addison’s disease (too little). A single value is interpreted alongside symptoms, medicines and the time of day.

Late-night saliva test. Taken around 11 p.m., when cortisol should be near its lowest. A persistently high midnight value is one of the standard screens for Cushing syndrome. Home collection kits for this purpose exist and are legitimate when ordered and interpreted by a clinician.

24-hour urine collection. Captures total cortisol output over a day, smoothing out the rhythm. Also used mainly to investigate suspected excess.

Suppression and stimulation tests. A doctor may give a medicine that should switch cortisol off, or a hormone that should switch it on, and measure the response. These dynamic tests are how the HPA axis itself is assessed.

Hair cortisol. A centimeter of hair stores roughly a month of cortisol exposure. This is a valuable research tool for population studies, but reference ranges for individuals are not established.

What about the direct-to-consumer “stress panel”? A healthy, stressed person will usually produce a normal result, because the system is doing exactly what it should. An abnormal result, meanwhile, needs medical follow-up anyway. Mayo Clinic’s position on screening for cortisol problems is that testing is indicated when symptoms suggest a specific disorder, not as a wellness check. If you are worried about your levels, describe your symptoms to a doctor and let them choose the test and the timing.

Common myths about stress hormones, corrected

Viral health content tends to be half right, which is what makes it sticky. Here are the claims that travel furthest, and what the evidence supports.

“Cortisol face” means your cortisol is high. Facial fullness has many ordinary causes: salt, alcohol, poor sleep, allergies, menstrual cycle, weight gain. Genuine cortisol excess, Cushing syndrome, does cause a rounded face, but it arrives with purple stretch marks, easy bruising, muscle weakness and high blood pressure, and it is rare. Puffiness after a stressful week is not a hormone diagnosis.

You can “detox” or “flush” cortisol. Cortisol is made continuously and cleared by the liver within hours. There is nothing to flush. The useful target is the trigger, not the molecule.

Adrenal fatigue explains your exhaustion. Addressed above: not a recognized diagnosis, no consistent evidence. Persistent fatigue has many testable causes, including anemia, thyroid disorders, sleep apnea and depression.

A morning “cortisol cocktail” of juice, salt and coconut water balances your hormones. No trial supports this. The drink is harmless for most people and may simply replace a skipped breakfast, which is probably why some feel better.

Stress hormones are always bad. They keep blood pressure up when you stand, wake you in the morning and let you perform under pressure. People with adrenal insufficiency can become critically ill without them.

Supplements reliably lower cortisol. Ashwagandha, phosphatidylserine and rhodiola have small, short trials, some showing modest cortisol reductions. The evidence is low quality, products vary in content, and some herbs interact with medicines or affect the liver. Any supplement decision belongs in a conversation with your doctor or pharmacist.

You can feel cortisol rising. You can feel adrenaline. Cortisol’s effects are too slow and diffuse to sense in the moment.

How to get rid of high stress hormones: what the trials support

The honest answer begins with reframing. You do not get rid of stress hormones; you restore a system that can switch off. The approaches with randomized trial evidence work by changing the brain’s threat appraisal, improving sleep, or giving the body a controlled rise-and-fall that recalibrates the curve.

Aerobic exercise. Each session raises cortisol briefly, then levels fall below baseline, and regular exercisers show a smaller cortisol response to psychological stressors. Trials in adults with depression and anxiety show symptom improvements comparable to other first-line treatments. Aim for the general guideline of about 150 minutes of moderate activity a week, built up gradually.

Sleep regularity. Restricting sleep raises evening cortisol and blunts the morning peak. Consistent wake times, morning daylight and limiting alcohol late in the evening are the levers with the best evidence.

Cognitive behavioral therapy and mindfulness-based programs. Multiple randomized trials show reduced perceived stress, anxiety and depressive symptoms, with modest reductions in cortisol in a subset of studies. Eight-week structured programs have the most data.

Slow breathing. Breathing at around six breaths a minute activates the parasympathetic system and lowers heart rate and blood pressure within minutes in laboratory studies. It is a tool for the moment, not a replacement for the above.

Social connection. Loneliness is associated with higher cortisol and worse cardiovascular outcomes in cohort studies; supportive contact buffers the stress response in experimental settings.

Reducing the load itself. No hormone intervention outperforms removing an avoidable stressor. That is sometimes impossible, which is precisely when professional support, including treatment for anxiety or depression, becomes the evidence-based path.

Medicines and prescribed treatments for anxiety, depression or insomnia can be part of this picture, and whether they are appropriate is a decision for the treating clinician based on the whole person, never on a cortisol value.

Stress hormones, sleep and weight: untangling cause from effect

Two of the most searched phrases, “cortisol belly” and “stress insomnia,” describe real patterns and misleading explanations. The arrows between stress, sleep and weight run in every direction at once.

Start with sleep. Cortisol’s natural low point near midnight is what allows deep sleep to begin; a stressful evening delays that fall. Short sleep, in turn, raises next-day cortisol and ghrelin, the hormone that signals hunger, while lowering leptin, the hormone that signals fullness. Sleep-restricted volunteers in laboratory studies eat several hundred extra calories a day, mostly from snacks. So part of what people call a cortisol effect on weight is a sleep effect on appetite.

Cortisol does have direct metabolic actions. It promotes fat storage in visceral depots, the fat packed around internal organs, which is metabolically more harmful than fat under the skin. People with Cushing syndrome gain weight centrally for exactly this reason. Whether the smaller, chronic elevations of everyday stress produce the same shift is supported by cohort data and some hair-cortisol studies, but the effect is modest compared with the behavioral pathway: stress changes what, when and how much people eat, and reduces movement.

The weight-and-stress loop also runs backward. Carrying excess weight is itself associated with higher inflammation and disturbed sleep, including sleep apnea, which fragments sleep and raises stress-hormone tone. Breaking the loop at any point helps the others.

None of this calls for shame or crash dieting; severe calorie restriction raises cortisol. It calls for the unglamorous combination that trials keep validating: protected sleep, daily movement, regular meals and, where needed, treatment for the anxiety or low mood sitting underneath. Weight that changes rapidly without explanation, in either direction, warrants a medical review rather than a wellness protocol.

When to see a doctor about stress symptoms

Most stress does not need a clinic. Some of what hides inside “stress” does, and the stakes of missing it are real. Seek medical advice if any of the following apply.

• Symptoms that could be heart-related. Chest pain or pressure, pain spreading to the arm, jaw or back, breathlessness, or a racing heart with faintness. Call emergency services; do not assume it is a panic attack.
• Signs of too much cortisol. Rapid central weight gain with a rounded face, purple stretch marks, easy bruising, muscle weakness in the thighs or shoulders, or new high blood pressure or high blood sugar.
• Signs of too little cortisol. Persistent fatigue with unexplained weight loss, dizziness on standing, salt craving, nausea or vomiting, or darkening of skin creases and gums. Severe vomiting with confusion or collapse can be an adrenal crisis, a medical emergency.
• Mood that has changed. Low mood, loss of interest or anxiety lasting more than two weeks, or panic attacks that are becoming frequent.
• Thoughts of harming yourself. Contact emergency services or, in the United States, call or text 988 to reach the Suicide and Crisis Lifeline, any time.
• Sleep that will not recover. Insomnia most nights for more than three months, or loud snoring with daytime exhaustion.
• Stress that follows a trauma. Flashbacks, nightmares or avoidance persisting beyond a month after a frightening event.
• Coping that has become its own problem. Alcohol, sedatives or stimulants used to get through the day.

Bring specifics: when symptoms began, how they track with sleep and life events, and every medicine and supplement you take, since some raise or lower cortisol. If you already take a prescribed medicine for any condition, keep taking it as directed until the prescribing clinician advises otherwise. Whether any test or treatment is appropriate is a decision for that clinician, made with you, on the basis of the whole picture rather than a single hormone reading.

Frequently asked questions

What are the 5 stress hormones?

The five most often listed are corticotropin-releasing hormone (CRH) from the hypothalamus, adrenocorticotropic hormone (ACTH) from the pituitary, cortisol from the adrenal cortex, and adrenaline and noradrenaline from the adrenal medulla and nerve endings. The first three form the slower HPA axis; the last two are fast-acting catecholamines. Some lists add vasopressin, prolactin or the hunger hormone ghrelin, which also rise under acute stress.

What are the main chronic stress effects on the body?

Over years, chronic stress is associated with higher blood pressure, increased risk of coronary heart disease, abdominal weight gain, insulin resistance, disturbed sleep, headaches, digestive problems and a higher likelihood of anxiety and depression. The cardiovascular link has the strongest observational evidence. Many effects run partly through behavior, such as poorer sleep and diet, rather than through cortisol alone.

How can I get rid of high stress hormones?

You cannot flush stress hormones, but you can restore a system that switches off. Regular aerobic exercise, consistent sleep timing, cognitive behavioral therapy or mindfulness programs, slow breathing and social connection all have randomized trial support for lowering perceived stress, with modest effects on cortisol. Reducing an avoidable stressor beats any hormone-focused tactic. Persistent symptoms deserve a doctor’s assessment.

Can low cortisol levels be caused by stress?

Chronic stress can flatten the daily cortisol rhythm, and some people with PTSD or burnout show lower-than-expected levels, but research is inconsistent and “adrenal fatigue” is not a recognized diagnosis. Truly low cortisol usually points to Addison’s disease, pituitary problems or abruptly stopping prescribed steroid medicines. Fatigue with weight loss, dizziness or darkening skin needs a medical blood test.

How do you check cortisol levels?

Doctors measure cortisol in a morning blood sample, a late-night saliva sample, a 24-hour urine collection, or through dynamic tests that suppress or stimulate the adrenal glands. Timing is critical because levels vary several-fold across the day. Testing is recommended when symptoms suggest a specific disorder such as Cushing syndrome or Addison’s disease, not as a general stress check in healthy people.

How do you know when stress hormones are being released?

You can feel adrenaline: a pounding heart, shaky hands, dry mouth, cold fingers and heightened alertness within seconds of a fright. Cortisol produces no distinct sensation because it rises slowly over 20–30 minutes and acts on metabolism, immunity and the brain over hours. Its chronic effects show up indirectly as disturbed sleep, appetite changes and altered mood rather than as a feeling.

Is "cortisol face" a real thing?

Genuine cortisol excess, called Cushing syndrome, does cause a rounded, fuller face, but it comes with purple stretch marks, easy bruising, muscle weakness and high blood pressure, and it is rare. Everyday facial puffiness is usually due to salt, alcohol, poor sleep, allergies or weight gain. Puffiness after a stressful week is not evidence of a hormone problem.

What is the difference between cortisol and adrenaline?

Adrenaline is a catecholamine from the adrenal medulla, triggered by a direct nerve signal, acting within seconds and clearing within minutes to raise heart rate, open airways and release glucose. Cortisol is a steroid from the adrenal cortex, triggered by the CRH and ACTH relay, peaking after 20–30 minutes and lingering for hours to sustain blood sugar, blood pressure and immune regulation.

Do supplements like ashwagandha lower cortisol?

A few small, short randomized trials of ashwagandha, phosphatidylserine and rhodiola report modest cortisol reductions, but the studies are low quality, often industry-funded, and products vary widely in content. Some herbs interact with medicines or affect the liver. The evidence does not support self-treating a stress problem with supplements; discuss any product with your doctor or pharmacist first.

Can chronic stress permanently damage the brain?

Animal studies and some human imaging research associate prolonged high cortisol with shrinkage in the hippocampus, the memory region, and changes in the prefrontal cortex. In people, these changes appear partly reversible when stress or depression is treated, and the human data come from small cohorts. Chronic stress raises the risk of depression and anxiety, but “permanent damage” overstates what the evidence shows.

References

• Cleveland Clinic: Cortisol
• MedlinePlus: Cortisol Test
• NHS: Addison's disease

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.