Adrenal Fatigue Explained: Symptoms And Ways To Support Adrenal Health

A guide to adrenal fatigue symptoms: 

• Adrenal fatigue is a commonly used term to describe symptoms linked to ongoing stress and persistent tiredness.
• Energy dips, poor sleep, and feeling “wired but tired” are commonly reported patterns.
• Chronic stress may influence how the body regulates energy and cortisol over time.
• Daily habits like sleep, stress management, and balanced nutrition may help support energy and resilience.

Modern life rarely lets up. Between work, family, and everyday demands, it's easy to feel like you're running on empty more often than not. Feeling tired after a big week can be normal. It's when that fatigue lingers, despite rest, that it's worth paying closer attention. 

You may have heard this described as adrenal fatigue or adrenal burnout. They’re often used to describe a group of symptoms associated with prolonged stress and changes in how the body responds to it. 

So what exactly is it, and what are some common signs of adrenal fatigue to look out for? Let’s take a closer look. 

How the adrenal glands work in the stress response

The adrenal glands are small, triangular-shaped glands that sit on top of each kidney. Despite their size, they play a key role in how the body responds to stress and maintains everyday functions like energy, metabolism, and fluid balance¹. 

Each adrenal gland has two main parts: the outer cortex and the inner medulla, which produce different types of hormones¹.

The adrenal cortex is responsible for producing steroid hormones, including¹:

• Cortisol, which helps regulate the stress response, blood sugar levels, and metabolism
• Aldosterone, which supports fluid balance and blood pressure
• Androgens, which contribute to hormone balance and development.

The medulla produces adrenaline and noradrenaline, the hormones behind the body's fight-or-flight response¹.

When you experience short-term (acute) stress, this system is activated quickly. Hormones like adrenaline and cortisol increase heart rate, sharpen focus, and prepare the body to respond to immediate challenges². Once the stressor passes, the body typically returns to a balanced state.

However, when stress becomes long-term (chronic), this response can stay switched on for extended periods. Over time, the body adapts by continuing to release stress hormones, which may begin to affect energy levels, mood, and overall resilience².

What is adrenal fatigue?

Adrenal fatigue is a term used to describe a collection of symptoms linked to ongoing stress, including persistent tiredness, feeling overwhelmed, and burnout. It's not a formally recognised medical diagnosis, but it's widely used to describe how the body can feel when stress doesn't let up over a long period.

At the centre of it all is cortisol. When stress becomes chronic, the relationship between cortisol and adrenal fatigue is shown: the body may struggle to maintain an optimal cortisol response over time. This is sometimes referred to as adrenal exhaustion³. Think of it less as the adrenal glands "giving out" and more as the stress response system becoming harder to sustain³.

The terminology is still debated in clinical settings, but these terms can be useful for framing the experience of ongoing fatigue and highlighting why supporting the body's stress response matters.

What causes adrenal fatigue? 

Adrenal fatigue is most commonly linked to prolonged stress. When the body is under constant pressure, the stress response system, including the adrenal glands, can remain highly active for extended periods, with little chance to recover³. 

While chronic stress is considered a key contributor, there are often multiple factors working together. These may include3:

• Ongoing emotional or psychological stress
• Poor or disrupted sleep patterns
• Demanding schedules or long periods of overwork
• Insufficient rest and recovery time
• Irregular eating habits
• Physical stressors such as illness or injury

Research has also found that certain groups may also be more prone to these symptoms, particularly those in high-demand roles or situations: caregivers, healthcare workers, first responders, people working multiple jobs, and those in high-pressure professions³.

In most cases, it's not a single cause but a cumulative effect. Physical, emotional, and environmental stressors can stack up over time, placing sustained demands on the body's stress response system that become harder to bounce back from.

Adrenal fatigue symptoms

People who describe adrenal fatigue often report a range of symptoms rather than a single defining issue. One of the more distinctive patterns is how energy shifts throughout the day, rather than just feeling generally tired³.

That pattern often looks something like this:

1. Waking up feeling unrefreshed, even after a full night's sleep.
2. Relying on caffeine to feel alert, especially in the morning.
3. A mid-morning dip, sometimes accompanied by cravings for something sweet or salty.
4. An afternoon slump typically between 2 pm and 5 pm.
5. A lift in energy after 6 pm, followed by a "second wind" later at night.
6. Difficulty winding down or falling asleep, despite feeling physically exhausted.

Alongside this energy pattern, people may also experience symptoms of adrenal fatigue such as ³:

• Brain fog or difficulty concentrating
• Reduced tolerance to stress
• Cravings for salty or sugary foods
• Feeling wired but tired at night
• Low mood, irritability, or feeling emotionally stretched

What does adrenal fatigue feel like?

For many people, adrenal fatigue feels less like ordinary tiredness and more like their energy never fully resets. They might get a full night's sleep and still struggle to get going in the morning. 

Some people describe feeling wired but tired: physically drained but mentally switched on, which makes it hard to wind down at night. Others notice they're getting sick more often, taking longer to recover from stress, or finding that things that used to feel manageable now feel like a lot.

Over time, people may also notice³:

• Low stamina and feeling run down throughout much of the day
• Reduced productivity and difficulty staying focused
• Slower recovery from stress or illness
• A general sense that their usual capacity to cope has shifted

Adrenal support: habits that may help support energy and resilience

When it comes to managing the symptoms associated with adrenal fatigue, the focus is less about quick fixes and more about supporting the body’s ability to handle stress over time.  

Because many of the symptoms are linked to prolonged stress, building healthy habits around rest, recovery, and wellbeing is a practical place to start3. Here’s the run-down on how to help adrenal fatigue symptoms. 

Prioritising quality sleep

Sleep plays a key role in regulating the body’s stress response, including how cortisol is produced and released. Poor-quality or disrupted sleep can throw cortisol patterns off balance and affect how the body handles stress the following day4.

Consistent, good-quality sleep, particularly deep sleep, may help support a more balanced stress response over time5. And it’s not just about how many hours you get. Frequent waking, lighter sleep, or irregular sleep patterns may influence how recovered and resilient you feel the next day6.

Prioritising your sleep is one way to help support how your body responds to stress. Focus on regular sleep routines, allowing enough time for rest, and creating a consistent wind-down period may help support overall energy levels.

Managing everyday stress

Small, everyday stressors have a way of adding up, especially when there's no real outlet for them. Over time, unmanaged stress can place sustained pressure on the body's stress response system, which is why building some simple habits around it matters.

Regular movement is a good place to start. Moderate-intensity exercise has been shown to support stress adaptation and overall wellbeing, while overly intense or prolonged exercise without adequate recovery may have the opposite effect⁴.

Mind-body practices like yoga or tai chi may also help support relaxation, mood, and stress resilience⁴. But stress management doesn't have to be elaborate. Simple, consistent habits can make a real difference:

• Making time for rest and recovery
• Building in small moments of relaxation or mindfulness
• Doing more of what you actually enjoy
• Identifying and reducing ongoing stressors where possible

Even small shifts in how you manage stress from day to day can support a more balanced response over time.

Balanced nutrition

Alongside movement, nutrition also plays an important role in how the body manages stress and produces energy, making nutrition another practical area worth paying attention to.

Diets high in refined foods and saturated fats may increase stress-related activity in the body, while whole-food diets, rich in fibre, healthy fats, and antioxidants, may help support a more balanced stress response⁴.

Certain nutrients also play a role in supporting energy production and the body's broader response to stress, including B vitamins, magnesium, and vitamin C⁴.

It's not just about what you eat, but when. Irregular meals or long gaps between eating may affect energy levels and cortisol rhythms, while consistent, balanced meals may help support steadier energy through the day⁴.

Supporting the body during busy periods

During particularly demanding periods, some people find it helpful to explore additional ways to support their wellbeing alongside their everyday habits. This can include adrenal support supplements as part of a broader routine, in combination with nutrients such as vitamins, minerals, and omega-3 fatty acids studied for their role in supporting the body's stress response and general health⁴.

That said, supplements work best as part of a wider approach rather than a standalone solution. Think of them as one piece of the puzzle, alongside sleep, nutrition, and stress management habits.

How long does it take to overcome adrenal fatigue?

There's no set timeline for how long it takes to overcome adrenal fatigue. For people experiencing ongoing tiredness or stress-related fatigue, improvements are often gradual rather than immediate. However, the overall timeframe can vary depending on factors such as stress levels, daily habits, and overall wellbeing.

As lifestyle habits are addressed, some people begin to notice shifts in their energy over time. For others, it takes longer, and that's okay too.

Rather than focusing on a fixed timeline, it can be more helpful to think in terms of supporting your overall wellbeing. Small, consistent changes to support the body’s stress response may contribute to better energy, resilience, and recovery over time.

Supporting your energy and stress response

Many of the symptoms people associate with adrenal fatigue are linked to ongoing stress and lifestyle factors. That’s why building supportive daily habits can play an important role in how you feel over time.

Simple, consistent actions can make a difference. Whether your sleep is lacking, or you need to find ways to manage your daily stress, focus on small changes that support your overall wellbeing. 

If you’re looking to learn more about supporting your energy and stress levels, explore the Swisse Wellness Hub for articles on sleep hygiene and tips to start feeling happier and healthier. 

References:

1. Megha, R., Wehrle, C. J., Kashyap, S., & Leslie, S. W. (2022). Anatomy, abdomen and pelvis, adrenal glands (suprarenal glands). StatPearls Publishing.
   https://www.ncbi.nlm.nih.gov/books/NBK482264/
2. Chu, B., Marwaha, K., Ayers, D., & Sanvictores, T. (2024). Physiology, stress reaction. StatPearls Publishing.
   https://www.ncbi.nlm.nih.gov/books/NBK541120/
3. Wilson, J. L. (2014). Clinical perspective on stress, cortisol and adrenal fatigue. Advances in Integrative Medicine, 1(2), 93–96.
   https://doi.org/10.1016/j.aimed.2014.05.002
4. Ring, M. (2025). An integrative approach to HPA axis dysfunction: From recognition to recovery. The American Journal of Medicine, 138(10), 1451–1463.
   https://doi.org/10.1016/j.amjmed.2025.05.044
5. Buckley, T. M., & Schatzberg, A. F. (2005). The Journal of Clinical Endocrinology & Metabolism, 90(5), 3106–3114.
   https://doi.org/10.1210/jc.2004-1056
6. Van Dalfsen, J. H., & Markus, C. R. (2018). The influence of sleep on human hypothalamic–pituitary–adrenal (HPA) axis reactivity: A systematic review. Sleep Medicine Reviews, 39, 187–194.
   https://doi.org/10.1016/j.smrv.2017.10.002