Cortisol gets labeled as “bad” far too often. In reality, cortisol is one of your body’s most important hormones. It helps you wake up in the morning, keeps your blood sugar steady between meals, supports healthy blood pressure, and helps you respond to challenges like illness, injury, and everyday stress.

The goal is not to “eliminate” cortisol. The goal is a healthy rhythm: the right amount, at the right times, for the right reasons.

What is cortisol?

Cortisol is a steroid hormone (a glucocorticoid) made by your adrenal glands, which sit on top of your kidneys. It is regulated by a communication pathway between your brain and adrenal glands called the HPA axis (hypothalamus, pituitary, adrenal).

What does cortisol do in the body?

Cortisol affects nearly every organ system. Here are some of its most important roles:

• Energy and metabolism: Helps regulate blood glucose (blood sugar) and supports access to fuel when you need it.
• Stress response: Helps your body respond to short term stress by increasing alertness and mobilizing energy.
• Immune balance and inflammation: Helps regulate inflammation and immune activity.
• Blood pressure support: Helps maintain healthy blood pressure and cardiovascular stability.
• Daily sleep wake timing: Works with your circadian rhythm to help you feel awake in the morning and wind down at night.

Cortisol’s daily rhythm matters

In most people, cortisol follows a predictable pattern: it rises toward morning, peaks around the time you wake, then gradually declines into the evening. That pattern supports focus, steady energy, and sleep quality.

When your routine, sleep, light exposure, or stress load is consistently off, you can feel it. It may show up as wired tired evenings, sluggish mornings, cravings, mood changes, or sleep that never feels restorative.

High cortisol vs low cortisol: what people often misunderstand

A lot of symptoms people blame on “high cortisol” are actually influenced by multiple factors: sleep loss, blood sugar swings, chronic stress, inflammation, thyroid function, medications, alcohol, and more. True cortisol disorders exist, but they require proper medical testing and interpretation.

Why cortisol work is so powerful in coaching

Many people don’t come to me saying, “I want help with cortisol.” They come in for brain fog, stubborn weight, low motivation, mood swings, or feeling burned out. But once we look at the patterns underneath, sleep and stress physiology are often at the center.

This is one reason I teach and coach from my Four Pillars of Health: hydration, exercise, nutrition, and sleep. When those pillars are supported consistently, cortisol rhythm tends to stabilize, and everything else becomes easier to improve.

Practical ways to support a healthier cortisol rhythm

These are simple, realistic starting points that support your nervous system and your daily rhythm:

• Anchor your mornings with light: Get outdoor daylight early in the day when possible, even 5 to 10 minutes.
• Build a steady blood sugar day: Prioritize protein at breakfast and include fiber rich foods at meals.
• Move your body most days: A walk after meals, strength training a few times per week, or gentle mobility all count.
• Protect your sleep window: Keep a consistent bedtime, dim lights at night, and reduce late evening scrolling.
• Use downshifts during the day: Slow breathing, short breaks outside, journaling, prayer, or a quick reset between tasks.
• Be careful with stimulants: Too much caffeine or caffeine too late in the day can push your system in the wrong direction.

Sources

• MedlinePlus Medical Test. “Cortisol Test.” Updated December 23, 2024.
• Cleveland Clinic. “Cortisol: What It Is, Function, Symptoms and Levels.” Updated February 17, 2025.
• National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NIH. “Cushing’s Syndrome.” Updated 2025.
• Oster H, et al. “Functional and Clinical Significance of the 24 Hour Rhythm of Circulating Glucocorticoids.” Endocrine Reviews. 2017.

Disclaimer

This article is for educational purposes only and is not medical advice. It does not diagnose, treat, cure, or prevent any disease. If you have persistent symptoms or concerns about hormone health, medications, or a possible endocrine disorder, please speak with a qualified healthcare professional.