One of the most common complaints I hear from my clients is the brutal struggle to simply get out of bed in the morning. Maybe your energy crawls up a bit once you finally get moving or have that first cup of coffee, but by 3 PM, your energy completely tanks.

Then, the “second wind” hits.

You might feel a slight lift around dinner, but by 9 or 10 PM- just when you should be winding down- you suddenly feel alert and productive. This “second wind” either keeps you up way later than you’d like, or you climb into bed at a decent hour only to stare at the ceiling, unable to shut your brain off. Or perhaps you fall asleep fine, but find yourself wide awake at 3 AM, unable to go back to sleep.

The next morning, the cycle repeats.

What most people don’t realize is that these frustrating energy swings are directly tied to your diurnal cortisol rhythm. When your energy is “upside down,” it’s a signal that something deeper- whether it’s chronic stress, gut imbalances, or nutrient gaps- is disrupting your body’s natural internal clock.

What is cortisol?

Cortisol is a steroid hormone naturally produced in the body inside your adrenal glands, which are small glands that sit on top of your kidneys. It’s commonly known as a stress hormone and plays an important role in managing your body’s response to stress, both short-term and long-term.

In addition to this, it also plays many other important roles in the body, including:

• Blood sugar management
• Regulating blood pressure
• Lowering inflammation
• Modulating metabolism and supporting thyroid hormone conversion.
• Helping to control your circadian rhythm or sleep-wake cycle¹

What is a normal cortisol pattern?

In normal conditions, cortisol follows a predictable daily rhythm. It normally peaks during the morning hours, about 30-45 minutes after you wake up, to provide the energy you need to get going for the day. Following this, it gradually decreases throughout the rest of the day, reaching its lowest point at night to ensure your body can have a restful night’s sleep.²

This daily rise and fall is known as the diurnal cortisol curve, and it is perfectly synced with your body’s natural circadian rhythm (your internal clock). The production and release of cortisol is managed by the hypothalamic-pituitary-adrenal (HPA) axis- a complex communication system between your brain and your adrenal glands that responds to your natural rhythms as well as physical, emotional, and environmental stress..² 

What causes cortisol patterns to change?

For many of us, that predictable, healthy rise and fall can start to look very different. Some individuals experience a “flipped curve” where cortisol is low in the morning (making it impossible to wake up) and spikes at night (the second wind). In other cases of chronic stress, cortisol might stay high all day, leaving you in a state of constant anxiety, or it may eventually bottom out into a pattern of being low all day, often referred to as burnout or exhaustion.

There isn’t just one reason these abnormal patterns develop; rather, it’s usually a combination of stressors that push the HPA axis out of balance.

Lifestyle & Environmental Triggers

• Chronic Stress Loop: In the early stages of long-term stress, cortisol levels stay consistently high. However, over time, this constant demand can lead to HPA-axis dysfunction (often called burnout), where the body struggles to produce enough cortisol, leading to a “low-all-day” energy pattern.
  
• Light Exposure & Circadian Disruption: Our internal clocks are set by light. Exposure to bright blue light (phones/TV) late at night suppresses melatonin and triggers cortisol. On the other hand, not getting enough natural sunlight in the morning fails to give your body the signal it needs to peak cortisol early.
  
• Sleep Quality & Timing: For most women, the biological “sweet spot” for sleep is between 10 PM and 11 PM, aiming for 7–9 hours (many women truly need the full 9). Shift work, late bedtimes, or frequent night waking force your adrenals to compensate for the lack of restorative rest.
  
• Evening Intensity: Strenuous or high-intensity exercise late in the day can cause cortisol to spike right when it should be tapering off, keeping you “wired” long after your workout is over.²

Internal & Physiological Stressors

• Blood Sugar Rollercoasters: When your blood sugar drops too low (perhaps from a high-carb lunch or skipping meals), your body views it as a crisis. It releases cortisol to pull glucose back into the bloodstream, creating a cycle of energy crashes and stress surges.
  
• Chronic Inflammation & Autoimmunity: Conditions like Hashimoto’s or gut dysbiosis put the body in a state of “invisible stress.” This constant inflammatory load forces the adrenals to release cortisol more frequently than they would in a healthy, non-inflamed state.
  
• Hormonal Changes: Major shifts during the menstrual cycle, pregnancy, or perimenopause can significantly impact how your body manages and clears cortisol.
  
• Nutrient Gaps & Stimulants: Your adrenal glands require specific nutrients to function, such as magnesium, B vitamins, vitamin C, and omega-3s. Deficiencies in these areas and/or excessive caffeine consumption can overstimulate or exhaust your cortisol production.
  
• Medication Interference: Certain common medications, including oral contraceptives, antidepressants, and some pain-relievers, can alter how cortisol is produced or metabolized by the liver.²

What Happens When Cortisol Stays Dysregulated?

When cortisol patterns are disrupted, it has a major impact on your energy levels and can eventually lead to issues like chronic fatigue or total burnout. It can also cause significant sleep disruption, leaving you struggling with insomnia and a sense of being “wired but tired.” Beyond the physical exhaustion, this dysregulation reduces your emotional resilience and your ability to cope with daily stress, often making you feel more irritable or sensitive to small, daily stressors that you used to handle with ease.^2,3

The mental health implications are also significant. Research shows that dysregulated cortisol, specifically elevated morning cortisol, can increase the risk of depression. In fact, HPA axis dysregulation is deeply implicated in the development of major depressive disorder (MDD) in adults. Your cortisol levels can even serve as a potential predictor for whether someone will experience, relapse with, or develop MDD in the future.³

This chronic stress and elevated cortisol can also put you at an increased risk of chronic illness and immune system dysfunction, such as the development of autoimmune conditions. Moreover, it can impact your long-term cardiovascular and metabolic health, putting you at a higher risk for stroke, diabetes, and cardiovascular mortality. ^2,3

On a day-to-day level, this state of low energy and low stress tolerance often leads to a “survival mode” in the body. This is why you might notice your food cravings and appetite ramping up- your brain is looking for a quick hit of energy just to keep you going. This makes it incredibly difficult to make the healthy food choices you want to make, or to find the actual physical energy you need to truly take care of yourself.

How can Functional Nutrition help improve cortisol regulation? 

As you can see, there are many complex, underlying reasons why your cortisol might be drifting off track. A functional nutrition approach is designed to help connect the dots between your daily life, your unique health history, and the specific triggers leading to your cortisol disruptions.

At its core, functional nutrition is personalized nutrition. Instead of a one-size-fits-all diet, we look at your body as a whole to address the actual root causes of your fatigue. We use clinically proven, bio-individual strategies to get you on the quickest path toward feeling like yourself again.

In my practice, this involves a comprehensive, phased protocol tailored specifically to you. We focus on:

• Personalized Nutrition: Designing optimal dietary patterns and strategic meal timing to stabilize your blood sugar and stop the “emergency” cortisol spikes.
  
• Targeted Supplementation: Using high-quality vitamins, minerals, and herbal adaptogens to support your adrenal glands and help your body build resilience to stress.
  
• Lifestyle Optimization: Making sustainable adjustments to your light exposure, sleep hygiene, and movement to reset your internal clock.
  
• Functional Testing: If needed, we can order specialized functional tests- such as a diurnal cortisol test- to see exactly what your specific patterns look like. This allows us to stop guessing and know exactly what your body needs.

The ultimate goal isn’t just to “fix” a lab value; it’s to help you restore your natural cortisol rhythms, reclaim your energy, and get back to the life you want to live.

Conclustion 

If you’ve been living in that “wired but tired” loop, please know that you don’t have to just push through the exhaustion. Your struggle to get up in the morning, 3 PM energy crash, and 10 PM second wind aren’t signs of a lack of willpower- they are clear signals from your body that your internal clock is out of sync.

Restoring your cortisol rhythm is about more than just “sleeping more.” It requires a comprehensive look at your unique triggers, from your gut health and blood sugar to your nutrient foundations and daily light exposure. By addressing these root causes through a functional lens, we can stop the survival-mode cravings and finally reset your body’s natural energy production.

Ready to Break the Cycle?

You don’t have to guess which supplements to take or which “trend” to follow. If you are ready to stop feeling like you’re running on fumes and want a personalized roadmap to reclaim your energy, I’m here to help!

Learn more about how you can work with me HERE.