5 Signs Your Cortisol Is Too High and How Adaptogen Supplements Help
Feeling wired but tired? Discover 5 common signs of high cortisol and learn how adaptogenic herbs like Ashwagandha can help your body manage stress.
Dr. Marcus Sterling, PharmD
March 2, 2026 · ⏱ 9 min read · View Source

5 Signs Your Cortisol Is Too High and How Adaptogen Supplements Help
In our fast-paced world, feeling stressed is often worn as a badge of honor. But when that constant, low-grade pressure becomes your new normal, your body can pay the price. The primary culprit is cortisol, often called the “stress hormone.” While essential for our survival—powering our fight-or-flight response—chronically elevated levels can disrupt nearly every system in your body. You might feel perpetually exhausted yet unable to get restful sleep, notice stubborn weight gain, or find yourself getting sick more often. This isn't just in your head; it's a physiological response to prolonged stress. The good news is that you can take steps to manage it. This article will explore five common signs that your cortisol is too high and delve into the science behind how a unique class of herbs called adaptogens may help your body build resilience and find its balance.
1. Persistent Fatigue and Poor Sleep
Do you wake up feeling like you haven't slept at all, rely on caffeine to get through the day, and then find yourself wide awake at 2 a.m.? This frustrating cycle of being “wired but tired” is a classic indicator of cortisol dysregulation. Your body has a natural 24-hour rhythm, known as the circadian rhythm, where cortisol levels should be highest in the morning to help you wake up and gradually decrease throughout the day, reaching their lowest point at night to allow for restful sleep.
When you’re under chronic stress, this rhythm gets thrown off. The hypothalamic-pituitary-adrenal (HPA) axis, your body's central stress response system, continuously signals the adrenal glands to pump out cortisol. This can lead to elevated levels at night, preventing you from falling asleep or causing you to wake up frequently. Over time, this constant demand can lead to what some call “adrenal exhaustion,” where you feel drained and depleted, yet the high cortisol levels at the wrong times prevent the deep, restorative sleep you desperately need.
How Adaptogens Can Help
Adaptogens are a unique class of plants and herbs that help the body resist stressors of all kinds, whether physical, chemical, or biological. As their name suggests, they help you adapt. Instead of acting as a stimulant or a sedative, they work to normalize body functions and strengthen the systems compromised by stress. A study published in the International Journal of Clinical Biochemistry and Research highlights that adaptogens can provide a “balancing activity on many body systems that are impacted by stress.”
This research specifically investigated how certain adaptogens affect cortisol levels in animal models under stress. The study found that mice pretreated with extracts of Holy Basil (Ocimum sanctum), Ashwagandha (Withania somnifera), and Brahmi (Bacopa monnieri) showed a significant fall in plasma cortisol levels when exposed to stressors. By helping to modulate the HPA axis and lower elevated cortisol, these herbs may support the restoration of a healthy circadian rhythm, promoting more restful sleep and improving daytime energy levels.
2. Stubborn Weight Gain, Especially Around Your Middle
If you’re eating well and exercising but still see the number on the scale creeping up—particularly around your abdomen—high cortisol could be a contributing factor. Cortisol can significantly impact your metabolism and where your body stores fat. When you’re stressed, cortisol triggers the release of glucose (sugar) from your liver for a quick burst of energy. However, if you aren't actually in a situation that requires physical exertion (like running from a predator), that excess glucose circulates in your blood.
This prompts your pancreas to release insulin to manage the high blood sugar. Over time, chronically high cortisol and insulin levels can lead to insulin resistance, a condition where your cells don't respond properly to insulin. This cascade of events encourages your body to store unused glucose as fat, especially as visceral fat—the deep, metabolically active fat that surrounds your organs and is linked to numerous health issues. Cortisol also increases appetite and cravings for high-calorie, sugary, and fatty foods, further compounding the issue.
How Adaptogens Can Help
By addressing the root of the problem—the body's response to stress—adaptogens can support healthier metabolic function. The study in the International Journal of Clinical Biochemistry and Research explains that adaptogens work to “normalize body functions” and “maintain healthy, balanced metabolic function.” While the study's primary focus was on cortisol reduction, this effect has direct implications for metabolic health.
Specifically, the paper notes that Ashwagandha (Withania somnifera) has been shown in various studies to modulate the increase in glucocorticoid levels (cortisol), which may “protect the body from the deleterious effects of chronic stress.” By helping to lower the cortisol spike associated with stress, adaptogens may indirectly help reduce the downstream effects on blood sugar and insulin, making it easier for the body to maintain a healthy weight and avoid stress-induced fat storage.
3. Getting Sick More Often
Do you seem to catch every cold that goes around the office? Is it taking you longer than usual to recover from a minor illness? Your immune system might be compromised by chronic stress. Cortisol plays a complex, dual role in immune function. In the short term, it has a potent anti-inflammatory effect, which is beneficial for surviving an immediate threat. However, the problem arises when cortisol levels remain high for extended periods.
Sustained high levels of cortisol suppress the immune system. It can decrease the production of lymphocytes (a type of white blood cell that is a cornerstone of your immune defense) and inhibit communication between immune cells. The source study states that while short-term surges can suppress inflammation, “surges of sustained levels of cortisol are not healthy and ultimately lead to… increased susceptibility to cancer” and other illnesses. This chronic suppression leaves you more vulnerable to infections, from the common cold to more serious pathogens.
How Adaptogens Can Help
Adaptogens are known for their immunomodulating properties, meaning they help balance and support the immune system. The research article mentions that Holy Basil (Ocimum sanctum) has been shown in studies to support the health of the immune system. Similarly, Ashwagandha (Withania somnifera) is described as having “immunomodulating properties” that harmonize immune function.
The mechanism is tied directly to their stress-reducing effects. By helping to lower the chronically elevated cortisol that suppresses your immune defenses, adaptogens allow your immune system to function more effectively. The study’s core finding—that adaptogens like Holy Basil and Ashwagandha can significantly reduce stress-induced cortisol levels in mice—provides a clear scientific basis for how these herbs can support immune resilience. By helping your body better manage its stress response, you're also helping it maintain a stronger, more vigilant defense against illness.
4. Mood Swings, Anxiety, and Irritability
Your mental and emotional state is deeply intertwined with your hormonal balance. If you find yourself feeling unusually anxious, irritable, or on an emotional rollercoaster, dysregulated cortisol may be playing a role. Cortisol directly impacts the brain and can interfere with the function of key neurotransmitters like serotonin and dopamine, which are crucial for mood regulation, feelings of pleasure, and motivation.
When cortisol is chronically high, it can deplete these “feel-good” brain chemicals, leaving you feeling flat, anxious, or quick to anger. The source study notes that psycho-social stress activates the HPA axis, causing an increase in morning cortisol levels that “correlated to the subjects reports of increased fatigue and anxiety.” This creates a vicious cycle: stress raises cortisol, which in turn makes you feel more anxious and less able to cope with stress, further elevating cortisol.
How Adaptogens Can Help
Adaptogens can offer support by helping to stabilize the HPA axis and, in turn, the neurochemical cascades it influences. The study points out that Brahmi (Bacopa monnieri) is renowned in traditional medicine as a nervine tonic. It is known for its ability to “enhance mind power” and is often used in formulas to “help relieve and prevent stress.”
Furthermore, the research highlights Ashwagandha’s “positive effect on the central nervous system,” noting its anti-stress actions and its ability to increase memory and learning. The foundational finding of the study—that these adaptogens lower plasma cortisol—is key. By buffering the body's physiological stress response, these herbs may help prevent the drastic swings in cortisol that disrupt neurotransmitter balance. This can lead to a more stable mood, a greater sense of calm, and an improved ability to handle daily pressures without feeling overwhelmed.
5. Brain Fog and Poor Concentration
Struggling to remember names, finding it hard to focus on a task, or feeling like your mind is moving through sludge? This phenomenon, often called “brain fog,” is another common sign of chronic stress and high cortisol. The hippocampus, a region of the brain vital for learning and memory formation, is particularly dense with cortisol receptors and highly sensitive to the hormone's effects.
While acute, short-term stress can sometimes sharpen focus, chronic exposure to high cortisol levels can be detrimental to cognitive function. It can impair the communication between brain cells, disrupt the process of memory retrieval, and even lead to a reduction in the volume of the hippocampus over time. This makes it difficult to think clearly, learn new information, and maintain concentration, impacting your productivity and overall quality of life.
How Adaptogens Can Help
Adaptogens may support cognitive clarity by protecting the brain from the damaging effects of chronic stress. The International Journal of Clinical Biochemistry and Research study specifically calls out the cognitive benefits of certain adaptogens. For instance, Brahmi (Bacopa monnieri) is said to “support and improve all aspects of mental functioning including comprehension, memory and recollection.”
Similarly, studies on Ashwagandha (Withania somnifera) have shown it to have “strong anti-stress actions, increasing memory and learning capabilities.” The primary mechanism of action remains their ability to modulate the stress response. By helping to lower the excessive cortisol that bombards the brain, adaptogens create a more favorable environment for healthy cognitive function. Reducing the physiological “noise” of stress allows your brain to operate more efficiently, helping to lift the fog and restore mental sharpness.
Finding the Right Support
Recognizing the signs of high cortisol is the critical first step toward reclaiming your health and well-being. While lifestyle changes like mindfulness, proper nutrition, and exercise are foundational, targeted support from high-quality adaptogens can be a powerful ally. However, navigating the supplement market can be overwhelming, with countless products making bold claims.
To help you make an informed choice, our team at SupplementTruth has rigorously tested and reviewed the top adaptogen supplements on the market. We analyze ingredient quality, dosage, purity, and overall effectiveness to guide you to a product that truly works.
➤ Read Our In-Depth Review of the Best Adaptogen Supplements of 2024
Conclusion
Chronic stress and the resulting high cortisol levels can manifest in ways that significantly impact your daily life, from persistent fatigue and weight gain to brain fog and a weakened immune system. Understanding these signs allows you to connect the dots between how you feel and what’s happening inside your body. As scientific research continues to validate their traditional use, adaptogenic herbs like Ashwagandha, Holy Basil, and Brahmi offer a promising, natural approach to help your body adapt to stress and rebalance its cortisol levels.
Medical Disclaimer: The information contained in this article is for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting any supplementation. Individual results may vary.