What Is Cortisol?

Cortisol is a hormone produced by the adrenal glands and is commonly known as the "stress hormone." It plays a vital role in keeping the body functioning normally. Every day, cortisol helps regulate energy production, metabolism, blood sugar, immune function, inflammation, blood pressure, and the body's natural sleep-wake cycle.

When you experience physical or emotional stress, your brain activates the hypothalamic-pituitary-adrenal (HPA) axis, causing cortisol levels to rise. This response is essential for survival, allowing the body to react quickly during challenging situations.

Normally, cortisol rises in the morning to help you wake up and gradually declines throughout the day. Problems arise when stress becomes chronic and cortisol remains elevated for weeks or months.

Effects of Chronically Elevated Cortisol

Persistent high cortisol levels have been associated with numerous health concerns, including:

Physical Effects

• Increased inflammation
• Fatigue and low energy
• Weight gain, particularly around the abdomen
• Elevated blood sugar levels
• Reduced muscle strength
• Slower recovery after exercise
• Poor sleep quality
• Frequent illnesses due to reduced immune function

Mental and Emotional Effects

• Anxiety
• Irritability
• Mood swings
• Difficulty concentrating
• Brain fog
• Memory impairment
• Reduced motivation

Cellular Effects

Chronic stress increases the production of reactive oxygen species (ROS), leading to oxidative stress. Excessive oxidative stress can damage cells, proteins, lipids, and DNA, contributing to accelerated ageing and poorer overall health.

The Link Between Cortisol, Inflammation and Oxidative Stress

Although cortisol normally helps regulate inflammation, prolonged stress can disrupt this balance.

Over time, the body may become less responsive to cortisol, resulting in persistent low-grade inflammation alongside increased oxidative stress. This combination has been linked with many chronic health conditions.

Supporting the body's antioxidant defenses and maintaining healthy inflammatory balance may help the body adapt more effectively to everyday stress.