“Adrenal Fatigue”/HPA Axis Dysfunction: Key Supplements to Boost Your Energy and Stress Resilience

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HPA axis dysfunction, sometimes referred to as “adrenal fatigue”, can show up as deep fatigue, feeling easily overwhelmed, and struggling to recover from stress. It often develops over time, especially when life feels like a constant push to keep up. While learning how to manage daily pressures is key to feeling better, nutrition can offer gentle support along the way.

Some vitamins, minerals, and plant-based compounds affect how the brain processes stress and regulates body functions. The brain leads the charge in coordinating how the body responds to challenges. Adaptogenic herbs like ashwagandha and rhodiola have been studied for their role in helping the body stay balanced during times of stress, especially by supporting healthy cortisol rhythms. Nutrients like magnesium, B vitamins, and omega-3s also support brain function and mood, both of which are tied to how the HPA axis works. Over time, these nutrients may help restore a steadier internal rhythm and offer support for both physical and emotional resilience. In this article, we’ll explore how nutrition can help support a balanced stress response and overall well-being.

What Is Adrenal Fatigue?

The term “adrenal fatigue” is often used to describe a group of symptoms that can show up when the body has been under stress for too long. These symptoms are connected to how the brain and adrenal glands work together through what’s called the HPA axis, the system that helps the body respond to stress, regulate digestion, support immune function, and maintain energy and mood.

While the adrenal glands themselves don’t actually become tired, ongoing stress can cause this system to become less responsive or out of sync. This is more accurately referred to as HPA axis dysfunction. It reflects how chronic stress can throw off the body’s rhythm and lead to changes in how you feel and function.

People experiencing HPA axis dysfunction often describe feeling worn out no matter how much they rest, having a hard time getting out of bed, or needing caffeine to get through the day. Stress may feel harder to manage than it used to. Cravings for salty or sweet foods are also common, along with getting sick more often or needing longer to recover from illness or stress.

How Does The HPA Axis Work?

The Hypothalamic-Pituitary-Adrenal (HPA) axis is a network that manages how the body responds to stress by coordinating signals between the hypothalamus, pituitary gland, and adrenal glands.

• Stress Causes Release of CRH from the Hypothalamus: The process begins when the hypothalamus perceives a stressor. In response, it secretes corticotropin-releasing hormone (CRH).
• The Hypothalamus Makes ACTH: CRH then travels to the pituitary gland, stimulating it to release adrenocorticotropic hormone (ACTH) into the bloodstream.
• The Adrenals Make Cortisol: ACTH acts on the adrenal glands, located on top of the kidneys, signaling them to produce and release cortisol, the body’s primary stress hormone.

Cortisol affects the body in several ways. It helps release stored energy, keeps blood pressure steady, and quiets the immune system when needed. It also sends signals back to the brain to slow down the stress response, helping to keep the system from staying too active for too long.

This chain of events helps the body respond to stress in an organized way, getting it ready for a “fight or flight” reaction. Once the stress passes, cortisol levels drop, the brain stops sending stress signals, and the body returns to its normal balance. This feedback loop is important for helping the body manage stress and recover after it is over.

Additionally, researchers are finding that there are changes in the actual sizes of parts of the brain affected by stress hormones. [PMC7364861]

High cortisol levels caused by long-term stress and HPA axis dysfunction can weaken the gut lining, leading to what is often called “leaky gut.” This happens when the intestinal wall becomes more porous and allows substances that are normally kept inside the gut to pass into the bloodstream. When stress continues over time, the intestinal barrier can become less effective. This increase in gut permeability can set off inflammation, trigger the immune system, and contribute to a variety of health problems, including digestive issues and other conditions throughout the body. Understanding how stress, cortisol, and gut health are connected helps explain why managing stress is so important for overall health.

How Does Cortisol Affect Sleep and Wakefulness?

Cortisol is often called the “stress hormone,” but it also follows the body’s natural daily rhythm, rising and falling at different times of the day. When the Hypothalamic-Pituitary-Adrenal (HPA) axis gets thrown off by ongoing stress, cortisol levels can become out of balance. Here is how the process works.

Normal Fluctuation of Cortisol Levels:

• Morning: Cortisol levels peak in the early morning, usually around 30 minutes after waking, in a surge known as the cortisol awakening response (CAR). This peak helps promote wakefulness and provides energy for the day ahead.
• Daytime: After reaching its peak, cortisol levels gradually decline throughout the day, decreasing energy levels and preparing the body for rest.
• Night: Cortisol levels reach their lowest point at night, facilitating sleep and allowing the body to recover and repair.

Altered Cortisol Levels and Their Effects:

• Sleep: Elevated nighttime cortisol levels can disrupt the body’s natural sleep-wake cycle, making it difficult to fall asleep or stay asleep. Low levels in the morning can make waking up more challenging, leading to a feeling of grogginess or unrefreshed sleep.
• Wakefulness: Abnormally high cortisol levels during the day can lead to heightened alertness and anxiety, making it hard to relax. Conversely, lower-than-normal daytime levels can result in fatigue and decreased energy, affecting overall alertness and mood.
• Fatigue: Chronic stress and consequent dysregulation of cortisol can lead to sustained high levels of cortisol or a flattened day-night curve, where the natural peak and trough pattern is lost. This can result in persistent fatigue, as the body misses out on the natural rhythm that helps regulate energy levels.

In essence, the HPA axis and cortisol levels play a critical role in regulating the body’s daily cycle of sleep, wakefulness, and energy use. Disruptions in this cycle can significantly impact physical and mental health, leading to sleep disorders, chronic fatigue, and other stress-related conditions.

What Food and Lifestyle Factors Are Important For Managing Adrenal Fatigue?

Managing adrenal fatigue, or more accurately HPA axis dysfunction, involves a comprehensive approach that includes both dietary and lifestyle modifications. Here’s a guide to the essential food and lifestyle factors that can support adrenal health and help manage stress:

Food Factors:

• Balanced Nutrition: Emphasize a diet rich in whole foods, including fruits, vegetables, whole grains, lean proteins, and healthy fats. Such a diet ensures a steady supply of essential nutrients that support adrenal function, like vitamin C, B vitamins, magnesium, and omega-3 fatty acids.
• Regular Meals: Eating regular, balanced meals and snacks helps maintain stable blood sugar levels, reducing stress on the adrenals.
• Hydration: Inadequate water intake can contribute to feelings of fatigue. Getting enough water intake is crucial for overall health and can help the body manage stress more effectively.
• Limit Stimulants: Reduce intake of caffeine and sugar, which can exacerbate adrenal fatigue by causing spikes and crashes in blood sugar and cortisol levels.
• Increase Intake of Adrenal-Supportive Foods: Foods rich in vitamins and minerals that support adrenal health include leafy greens, nuts, seeds, fish, and seaweed.

Lifestyle Factors:

• Stress Management: Techniques such as meditation, yoga, deep breathing exercises, and mindfulness can reduce perceived stress and its impact on the HPA axis.
• Adequate Sleep: Ensuring 7-9 hours of quality sleep per night can significantly impact adrenal health and stress resilience.
• Moderate Exercise: While vigorous exercise might be too stressful for those with adrenal fatigue, gentle activities like walking, yoga, and swimming can be beneficial.
• Reduce Overcommitment: Learning to say no and reducing the number of commitments can help lower stress levels.
• Social Support: Maintaining a supportive network of friends and family can provide emotional support and reduce stress.
• Limit Exposure to Toxins: Reducing exposure to environmental toxins and choosing clean, organic foods when possible can help minimize additional stress on the body.
• Mindful Practices: Engaging in activities that promote relaxation and joy, such as hobbies, reading, or spending time in nature, can improve mental health and stress management.

By incorporating these food and lifestyle changes, people can support their body’s ability to manage stress, potentially reducing the fatigue associated with HPA axis dysfunction. It’s important to approach these changes gradually and consider working with a healthcare professional to tailor a plan that suits your individual needs and circumstances.

What Nutritional Supplements Are Recommended For Adrenal Fatigue?

For managing symptoms associated with HPA axis dysfunction, often referred to as “adrenal fatigue,” certain nutritional supplements are recommended to support adrenal health and stress response:

• Adaptogens: Herbs like ashwagandha, rhodiola rosea, and holy basil help balance cortisol levels and improve the body’s resilience to stress.
  • Ashwagandha: This adaptogen has a significant impact on reducing cortisol levels and supporting adrenal health thereby reducing stress levels and improving the overall quality of life. [PMC6979308]
  • Ginseng: Asian ginseng (Panax ginseng) is a traditional adaptogen that helps the body cope with stress. It’s known to support energy, focus, and emotional balance. Research suggests it works by calming the stress response, helping regulate hormones, and protecting both mind and body from the effects of ongoing pressure. [PMC5628357]
  • Rhodiola Rosea: Also highlighted for its adaptogenic properties, Rhodiola is particularly noted for its ability to help combat fatigue and improve stress tolerance. [PMID: 19016404]
  • Holy Basil (Tulsi): An adaptogenic herb that helps counteract stress effects, balances cortisol levels, and promotes mental balance. [PMC9524226]
• Magnesium: Known as a calming mineral, magnesium supports nervous system health and can help improve sleep quality and reduce fatigue. [PMC3703169]
• Multivitamins: A good quality multivitamin can supplement the following:
  • Vitamin C: Essential for adrenal gland function, vitamin C helps regulate cortisol and supports the immune system. [PMID: 38010274]
  • B Vitamins: Particularly B5 (pantothenic acid), B6, and B12, these vitamins are crucial for energy production and supporting the body’s stress response. [PMC6770181]
  • Zinc: Important for neurotransmitter function and overall immune health, zinc can support the body’s ability to handle stress. [PMID: 1702662]
  • Vitamin D: Often referred to as the “sunshine vitamin,” vitamin D deficiency has been linked to mood disorders and fatigue. Supplementing with vitamin D may support overall mood and energy levels. [PMC12638446]
  • Selenium: An antioxidant that is essential for thyroid and adrenal gland health. Selenium can help regulate the production of reactive oxygen species within these glands. [PMC8081839]
• Omega-3 Fatty Acids: Found in fish oil supplements, omega-3 fatty acids can help reduce inflammation and support brain health, thereby impacting mood and stress management. [PMID:12909818]
• Probiotics: Gut health plays a role in how we respond to stress and regulate mood. Probiotics help support a balanced gut microbiome, which may in turn have a calming effect on the HPA axis. [PMC10217264]
• L-Theanine: L-theanine, an amino acid naturally found in green tea, is known for promoting a sense of calm without causing drowsiness. It helps ease stress and anxiety, smooths out caffeine-related jitters, and may even support clearer thinking under pressure. Studies suggest that L-theanine can help reduce blood pressure spikes in those who are more sensitive to stress, while also improving mood, sleep quality, and aspects of cognitive function, such as verbal fluency. Taken regularly, it appears to be a safe and gentle option for supporting mental clarity and emotional balance [PMC11263523]
• Phosphatidylserine: This phospholipid plays a crucial role in cell membrane integrity and may help decrease the effects of stress on the body by reducing cortisol levels. In a placebo-controlled study, 9 men took 800 mg/d phosphatidylserine for 10 days. This significantly blunted the ACTH and cortisol responses to physical exercise. The researchers concluded that phosphatidylserine may counteract stress-induced activation of the hypothalamic-pituitary-adrenal axis. [PMID: 1325348]

The Problem with Glandular Supplements

Glandular supplements are made from the dried and powdered glands of animals, often from bovine or porcine sources. The idea is to provide the raw materials your own body needs to support gland function, such as the adrenal glands. These products may contain small amounts of active hormones, enzymes, or peptides, depending on how they are processed. But there are several reasons to be cautious:

• Better Options Exist: You can support adrenal function with nutrients like B-complex vitamins, vitamin C, magnesium, and adaptogenic herbs. These options support your stress response without introducing foreign hormones.
• Hormone Disruption: Even trace amounts of animal hormones can affect your own hormone regulation. Glandulars may interfere with your hypothalamic-pituitary-adrenal (HPA) axis, the system your body uses to control cortisol and other stress hormones.
• Lack of Regulation: Glandulars are not standardized for hormone content. That means the amount of active compounds can vary from batch to batch, with no reliable way to predict their effects.
• Potential for Contamination: Poor-quality sourcing raises concerns about heavy metals, pathogens, and other contaminants in glandular products, especially if the glands come from non-U.S. sources or are not third-party tested.
• Not Intended for Long-Term Use: Some practitioners may use glandulars short-term in carefully monitored cases, but long-term use is not advised without clinical supervision.

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Supplement Safety Information

The safety profile of adaptogens, magnesium, multivitamins, fish oil, probiotics, and L-theanine is favorable, overall. When consumed within recommended guidelines, these supplements are well-tolerated by most people. Adaptogens have a long history of use, with minimal adverse effects reported. Magnesium is essential for numerous physiological functions. Multivitamins provide a broad spectrum of nutrients to support overall health, with a very low risk of side effects when taken as directed. Fish oil is widely recognized for its heart health benefits and is considered safe for daily intake, with quality products minimizing any concerns related to contaminants. Probiotics are generally regarded as safe, contributing to gut health and balance without significant side effects. L-theanine is known for its calming effects and is also safe for most people when used in moderation. It’s always prudent to consult with a healthcare professional before incorporating any new supplements into your routine, particularly to address specific health conditions or to avoid potential interactions with medications.

Medication Interactions

• Anticoagulants and Antiplatelets: These medications, including warfarin and aspirin, may have increased bleeding risks when taken with fish oil due to its blood-thinning properties.
• Antihypertensives: Blood pressure medications could interact with fish oil, potentially enhancing their blood pressure-lowering effect. Magnesium and adaptogens like rhodiola may also lower blood pressure, necessitating monitoring for low blood pressure.
• Antibiotics: Certain antibiotics can be affected by magnesium and multivitamins because minerals like magnesium can bind to the antibiotics, reducing their absorption and effectiveness. It’s recommended to separate the intake of these supplements and antibiotics by a couple of hours.
• Diabetes Medications: Magnesium and adaptogens may affect blood sugar levels, potentially requiring adjustments in diabetes medication dosages to prevent low blood sugar.
• Central Nervous System Depressants: L-theanine may increase the sedative effects of medications that cause sedation or drowsiness, including benzodiazepines and some antidepressants, leading to increased sedation.
• Immunosuppressants: Since adaptogens and probiotics can modulate immune system activity, they may interact with immunosuppressive drugs by possibly altering their intended effects.
• Thyroid Hormones: It’s advisable to take supplements and thyroid hormones at different times of the day.

Supplement Interactions

• Adaptogens: May enhance the effects of other stress-relieving supplements like L-theanine, potentially leading to over-relaxation or sedation, and combining with stimulant-based supplements (like caffeine or guarana) might reduce their intended energizing effects.
• Magnesium: Can interact with calcium supplements, as excessive amounts of one can inhibit the absorption of the other, affecting bone health. Taking zinc supplements alongside magnesium without balancing their intake can lead to imbalances, as high doses of zinc can hinder magnesium absorption.
• Multivitamins: May lead to excessive intake of certain nutrients when taken with single-nutrient supplements (like vitamin D or iron), increasing the risk of toxicity. Fat-soluble vitamins (A, D, E, K) within multivitamins can interact with omega-3 fatty acids in fish oil, potentially enhancing absorption but also increasing the risk of vitamin toxicity if not monitored.
• Fish Oil: When taken with vitamin E supplements, may increase the antioxidant effect but also the risk of bleeding, as both can have anticoagulant properties. Combining with garlic supplements could further enhance fish oil’s blood-thinning effect, increasing bleeding risk.
• Probiotics: Combining with antibiotic supplements (like allicin from garlic or berberine) might reduce the effectiveness of probiotics, as these supplements can have antibacterial properties that affect gut flora. Taking fiber supplements might enhance the growth and activity of probiotics, improving their efficacy in supporting gut health.
• L-Theanine: Combining with caffeine supplements can modulate caffeine’s stimulating effects, promoting a more focused and less jittery energy. When taken with other calming supplements (like valerian root or melatonin), L-theanine might enhance their sedative effects, potentially leading to excessive drowsiness.

To Sum It Up

Supplements like adaptogens, magnesium, multivitamins, fish oil, probiotics, and L-theanine can play a helpful role in managing symptoms linked to “adrenal fatigue,” or HPA axis dysfunction. Each one supports the body in a different way: adaptogens help the body adjust to stress, magnesium supports relaxation and sleep, multivitamins cover basic nutritional needs, fish oil helps with inflammation and brain health, probiotics support the gut-brain connection, and L-theanine promotes a calm but focused state. When used together, they can be part of a broader plan to support adrenal health and ease the strain of chronic stress and fatigue.

It is important to remember that supplements are only one piece of the puzzle. Lasting improvement usually also involves changes to diet, daily habits, and stress management. Working with a dietitian can help you find the approach that fits your health needs, your diet, and your lifestyle, giving you a clearer path forward.

This Article is Not a Substitute for Medical Advice

This information is provided for educational purposes only and is not a substitute for medical advice. Supplement Sciences does not provide medical care and cannot ensure the safety or effectiveness of any product for your personal use. Always consult your physician before starting any supplement, especially if you are pregnant, breastfeeding, or managing a serious health condition such as cancer, liver disease, or kidney disease. Dietary supplements are not designed to diagnose, treat, cure, or prevent any disease.

* These statements have not been evaluated by the Food and Drug Administration.