Low cortisol can leave you feeling drained, foggy, and unable to handle even minor stress, and several evidence-backed lifestyle strategies can help nudge your levels back up. Morning light exposure, well-timed exercise, sleep hygiene, and even your caffeine habit all influence how much cortisol your adrenal glands produce throughout the day. But there is an important boundary between cortisol that is low-normal due to lifestyle factors and cortisol that is clinically deficient because of a medical condition. The strategies below work on the lifestyle side of that line, and knowing where that line sits matters before you start experimenting.
When Low Cortisol Is a Medical Problem, Not a Lifestyle One
True adrenal insufficiency is a syndrome of cortisol deficiency that requires prescription glucocorticoids, not morning sunlight. A 2025 review in JAMA describes treatment typically involving hydrocortisone at roughly 15 to 25 mg daily, with mineralocorticoids added for primary adrenal insufficiency.1JAMA. Adrenal Insufficiency in Adults: A Review If your doctor has diagnosed adrenal insufficiency or if you are tapering off long-term steroid use, the natural strategies in this article are not substitutes for medication. They may complement treatment, but that conversation belongs with your endocrinologist.
Outside of clinical insufficiency, though, plenty of people walk around with cortisol levels that are functionally low. Chronic stress can paradoxically lead to blunted cortisol output over time, a pattern sometimes called hypocortisolism. Research on people with severe burnout found that their salivary cortisol responses to an acute stressor were lower than those of healthy controls, suggesting that prolonged stress can exhaust the system rather than keep it revved up.2PubMed Central. Burnout and Hypocortisolism – A Matter of Severity? A Study on ACTH and Cortisol Responses to Acute Psychosocial Stress If you recognize yourself in this picture, the lifestyle levers discussed below may help restore a healthier cortisol rhythm, but getting proper lab work first is a smart move so you know what you are working with.
Morning Light Is the Strongest Single Signal
Your body’s cortisol production follows a sharp daily rhythm. Levels surge in the first 30 to 45 minutes after waking, a phenomenon called the cortisol awakening response, and then decline steadily across the day. This morning burst has been proposed to serve as a resource-mobilization system, preparing you for the physical, immune, and cognitive demands of the day ahead.3Endocrine Reviews. The Cortisol Awakening Response If that burst is weak or absent, you start the day behind.
Bright light right after waking is the most reliable way to amplify it. A study in the Journal of Clinical Endocrinology and Metabolism found that transitioning from dim to bright light in the early morning induced an immediate cortisol elevation of more than 50 percent, an effect that was specific to morning exposure and did not occur with afternoon bright light.4The Journal of Clinical Endocrinology & Metabolism. Transition from Dim to Bright Light in the Morning Induces an Immediate Elevation of Cortisol Levels A separate set of experiments confirmed that bright light outperformed dim light and that blue and green wavelengths were more effective than red light at boosting the cortisol awakening response in healthy men.5PubMed. The effects of post-awakening light exposure on the cortisol awakening response in healthy male individuals
The practical takeaway is straightforward: get outside within the first half hour of waking, or flip on bright overhead lights the moment your alarm goes off. Scrolling your phone in a dark room does not cut it. The effect depends on light intensity and wavelength, and natural sunlight delivers both in abundance. Even on a cloudy day, outdoor light is many times brighter than typical indoor lighting. If you live at a high latitude in winter, a broad-spectrum light therapy lamp aimed at your face during breakfast can serve as a reasonable stand-in.
From an evolutionary standpoint, this makes sense. Brighter ambient light at waking may have signaled favorable outdoor conditions, prompting greater physical activity and higher demands on energy, immune readiness, and cognitive performance throughout the day.6Endocrine Reviews. The Cortisol Awakening Response: Regulation and Functional Significance Your adrenal glands are essentially calibrating the day’s cortisol budget based on light cues you give them at dawn.
Sleep Shapes the Entire Cortisol Curve
Morning light gets the cortisol rhythm started, but sleep is what sets the stage for a healthy rhythm to exist in the first place. Losing even a single night of adequate sleep changes things. In young women, one night of restricted sleep significantly reduced morning cortisol levels while pushing cortisol higher in the afternoon and evening, flattening the curve that should peak sharply in the morning and drop by bedtime.7PubMed. Impact of acute sleep restriction on cortisol and leptin levels in young women A flattened cortisol curve means you get less of the hormone when you need it most and more of it when it should be receding.
Chronic misalignment makes this worse. Research examining both total sleep deprivation and ongoing circadian disruption found that acute total sleep deprivation actually increased cortisol, but chronic circadian misalignment significantly reduced it.8PubMed Central. Influence of sleep deprivation and circadian misalignment on cortisol, inflammatory markers, and cytokine balance In other words, the occasional all-nighter spikes cortisol temporarily, but a sustained pattern of irregular sleep and wake times grinds it down. People who naturally wake earlier tend to show higher mean cortisol levels and a more pronounced daily rhythm than late chronotypes, and longer sleep the night before is positively correlated with a stronger morning cortisol peak.9PubMed. Chronotype, sleep loss, and diurnal pattern of salivary cortisol in a simulated daylong driving
If your cortisol feels low, fixing your sleep schedule may be the highest-leverage change you can make. Consistent bed and wake times, even on weekends, help your circadian clock keep the cortisol rhythm properly anchored. This pairs naturally with the morning light strategy: a regular wake time puts you in position to catch the light cue your adrenals need.
Exercise Intensity Matters More Than Duration
Exercise is a potent cortisol stimulus, but only above a certain intensity. A study examining exercise at 40, 60, and 80 percent of maximal oxygen uptake found a clear dose-response relationship. The low-intensity session barely changed cortisol from baseline, while the moderate session raised it by about 40 percent and the high-intensity session by roughly 83 percent.10PubMed. Exercise and circulating cortisol levels: the intensity threshold effect Light walking, in other words, will not move the needle. You need to be breathing hard enough that carrying on a conversation becomes difficult.
This does not mean you should crush yourself with high-intensity training every day, especially if burnout-related hypocortisolism is the concern. There is a nuance here. Research has shown that the cortisol response to exercise is proportional to intensity, and that a strong exercise-induced cortisol rise actually dampens the cortisol response to a subsequent psychological stressor.11PubMed. The effects of exercise intensity on the cortisol response to a subsequent acute psychosocial stressor So a hard workout in the morning gives you a burst of cortisol when it is useful and may blunt the cortisol hit from stressful events later in the day. That is a healthier pattern than having low cortisol all morning and then spiking from work stress at 4 p.m.
For someone with low cortisol trying to restore a normal rhythm, moderate-to-vigorous exercise in the morning or early afternoon is the sweet spot. Training late at night can delay cortisol’s evening decline and interfere with sleep, working against the circadian consistency you are trying to build.
Caffeine Reliably Raises Cortisol
Your morning coffee is doing more than waking you up. Caffeine stimulates the pituitary-adrenal axis directly. In healthy young men, caffeine produced a roughly 30 percent increase in cortisol within an hour, an effect driven at least partly by increased ACTH release from the pituitary.12PubMed. Stress-like adrenocorticotropin responses to caffeine in young healthy men After five days of caffeine abstinence, a caffeine challenge caused a robust cortisol increase across the entire waking day.13PubMed Central. Caffeine Stimulation of Cortisol Secretion Across the Waking Hours in Relation to Caffeine Intake Levels
There is a tolerance effect, though. Regular caffeine consumers show a smaller cortisol response to their daily dose than people who drink it occasionally. If you have been consuming caffeine heavily for years, taking a short break and then reintroducing it can restore a stronger cortisol response. For someone actively trying to boost morning cortisol, a cup of coffee timed about 60 to 90 minutes after waking, after the natural cortisol awakening response has already started its rise, stacks the caffeine effect on top of the body’s own morning surge rather than substituting for it.
Cold Exposure as an Acute Trigger
Cold water immersion and cold showers have gained popularity as wellness tools, and part of the physiological rationale involves cortisol. When your body detects a drop in skin temperature, the hypothalamus activates the sympathetic nervous system and engages the HPA axis, increasing cortisol secretion alongside norepinephrine and epinephrine.14Molecular Psychiatry. Is cold exposure a viable lifestyle intervention for mental health? Reviewing evidence and mechanisms The effect is acute and time-limited, your cortisol spikes for the duration of the cold exposure and shortly after, then returns to baseline.
Whether regular cold exposure builds a more robust cortisol rhythm over time or just provides a temporary jolt is still unclear. Most of the controlled data on cold and cortisol come from single-session studies, not long-term interventions. As a practical tool, a cold shower in the morning stacks well with light exposure and exercise: you get a quick sympathetic activation that may complement the cortisol awakening response. But if you find cold exposure deeply stressful rather than invigorating, forcing it could work against recovery, particularly if burnout is already in the picture.
Licorice Root Slows Cortisol Breakdown
Most strategies on this list work by signaling your adrenal glands to produce more cortisol. Licorice root takes a different approach: it slows the rate at which your body deactivates cortisol. The active compounds in licorice, glycyrrhizic acid and glycyrrhetinic acid, inhibit an enzyme called 11-beta-hydroxysteroid dehydrogenase, which normally converts active cortisol into its inactive form. By blocking this enzyme, licorice effectively raises circulating cortisol levels without requiring the adrenals to produce more of it.15PubMed. Licorice inhibits 11 beta-hydroxysteroid dehydrogenase messenger ribonucleic acid levels and potentiates glucocorticoid hormone action
This sounds appealing, but it comes with a significant downside. The same enzyme system that licorice inhibits also protects your kidneys from cortisol acting like a mineralocorticoid, which means licorice can cause sodium retention, potassium loss, and elevated blood pressure. Licorice-flavored candy and supplements containing real glycyrrhizin, not the artificially flavored kind, can produce these effects at surprisingly low doses if consumed daily. If you have low cortisol and want to try licorice, use it cautiously, at low doses, and only after confirming that your blood pressure and potassium are in a healthy range. People with hypertension or heart conditions should avoid it entirely.
Vitamin C and Adrenal Gland Function
The adrenal glands contain some of the highest concentrations of vitamin C in the body, and they actively secrete it in response to ACTH stimulation. Research has demonstrated that ACTH triggers the adrenals to release vitamin C into the bloodstream, and this vitamin C serves as a cofactor in the synthesis of both cortisol-related catecholamines and the stress hormones norepinephrine and epinephrine.16The American Journal of Clinical Nutrition. Human adrenal glands secrete vitamin C in response to adrenocorticotrophic hormone In essence, your adrenals burn through vitamin C when they are working hard, and if stores are depleted, the synthesis machinery may not run at full capacity.
This does not mean mega-dosing vitamin C will supercharge your cortisol output. The evidence supports adequacy, not excess. If you are eating a reasonable amount of fruits and vegetables, you are probably fine. But people under chronic stress, smokers, and those with poor dietary variety are more likely to be running low on vitamin C, and in that context, ensuring adequate intake could remove a bottleneck in adrenal hormone production. A few servings of citrus, bell peppers, or berries each day covers it without needing a supplement.
Mindfulness for Cortisol That Has Gone Flat
This one sounds counterintuitive. Mindfulness is typically promoted as a way to lower cortisol in stressed-out people. But in situations where cortisol has become blunted, meaning the normal reactive spikes in response to challenge are absent, mindfulness practice can actually help restore cortisol reactivity. A randomized trial of colorectal cancer patients undergoing chemotherapy found that those who practiced mindfulness showed increased cortisol reactivity compared to controls. More than twice as many patients in the mindfulness group displayed a normal cortisol rise in response to a stressor than those in the control group.17PubMed Central. Mindfulness practice reduces cortisol blunting during chemotherapy: A randomized controlled study of colorectal cancer patients
The interpretation here is that mindfulness does not simply suppress cortisol. It appears to help regulate it, restoring responsiveness when the system has gone flat. This fits with the broader concept that a healthy cortisol pattern is not “low all the time” but rather one that rises and falls dynamically in response to real demands. For someone whose cortisol has become blunted from prolonged stress, illness, or burnout, a regular mindfulness practice may help the HPA axis recalibrate its reactivity rather than staying stuck in a dampened state.
Other Dietary Factors Worth Knowing About
Carbohydrate intake has an interesting relationship with cortisol. A meta-analysis found that carbohydrate supplements consumed during exercise significantly blunted the post-exercise cortisol rise, and research on low-carbohydrate diets in men suggests that chronic low carbohydrate intake may similarly affect cortisol dynamics.18PubMed Central. Low-carbohydrate diets and men’s cortisol and testosterone: Systematic review and meta-analysis If you are eating very low-carb and wondering why your morning cortisol is muted, the two may be connected. This does not mean you need to eat a high-carbohydrate diet, but very strict carbohydrate restriction can shift cortisol dynamics in ways that are not always desirable, particularly if your cortisol is already running low.
Sodium restriction is another factor that affects adrenal hormones, though the picture is more specific to aldosterone than cortisol. When researchers put healthy adults on a restricted sodium diet, the circadian rhythms of renin and aldosterone shifted significantly, but cortisol’s overall level did not change much.19Hormone Research. Circadian Rhythms of Plasma Renin, Aldosterone and Cortisol on Habitual and Low Dietary Sodium Intake So while adequate salt intake matters for overall adrenal health, dramatically cutting sodium is unlikely to be a primary driver of low cortisol.
Adaptogens and Herbal Supplements
You will inevitably encounter claims about adaptogenic herbs like ashwagandha, rhodiola, and Panax ginseng in the context of cortisol. The framing is usually that adaptogens “balance” cortisol, lowering it when it is high and raising it when it is low. The reality is less tidy. Panax ginseng, for example, has documented effects on the HPA axis as part of its broader action on neurotransmitter systems, neurotrophic factors, and inflammation.20Cell Proliferation. Mechanisms of Panax ginseng action as an antidepressant But calling these effects “cortisol boosting” oversimplifies what is happening. Ginseng modulates the stress response at multiple levels, and whether it raises or lowers cortisol in a given person likely depends on where their baseline sits and what else is going on.
Ashwagandha, the most popular adaptogen in the wellness space, has mostly been studied for its cortisol-lowering properties in chronically stressed individuals, which is the opposite of what someone with low cortisol wants. If your cortisol is genuinely low, reaching for an adaptogen marketed as a stress-reducer could push things in the wrong direction. The evidence for herbal supplements “raising” low cortisol specifically is thin compared to the evidence for the lifestyle strategies discussed earlier. If you want to try adaptogens, consult with a healthcare provider who can monitor your levels before and after.
Putting the Signals Together
The interventions above work best as a system rather than in isolation, because they all converge on the same underlying rhythm. A regular sleep schedule anchors the circadian clock. Morning light amplifies the cortisol awakening response that the clock is trying to produce. Moderate-to-vigorous exercise in the early part of the day adds an additional cortisol stimulus when levels should be high. Caffeine stacks on top of that. Adequate vitamin C and reasonable carbohydrate intake remove metabolic bottlenecks. And if burnout has flattened your cortisol reactivity altogether, mindfulness practice may help your HPA axis start responding normally again.
Timing matters as much as the intervention itself. Morning light at 10 p.m. does nothing. High-intensity exercise at midnight makes things worse. Cold exposure right before bed may leave you too alert to sleep. The thread connecting everything is circadian alignment: giving your body the right signals at the right times so that cortisol rises steeply in the morning and falls gracefully by evening. Low cortisol is often less about a broken gland and more about a jumbled set of signals, and sorting those signals out is something you can start doing today.