Stress Tested: The Science of Cortisol, Burnout & Body-Mind Health

Stress isn’t just mental — it’s biological.

In Stress Tested, Dr. Richard Mackenzie and Peter Walker explore the latest science behind stress hormones like cortisol and how chronic stress reshapes your brain, metabolism, immune system, and long-term health.

Backed by modern research, this book reveals:

• How cortisol affects weight, sleep, and inflammation

• The connection between stress and chronic disease

• Why burnout is more than just exhaustion

• The body-mind link explained through science

• Practical strategies to regulate stress hormones naturally

Perfect for readers interested in stress management, mental health, biohacking, nervous system regulation, hormonal balance, and performance optimization.

If you want to understand how stress is impacting your body — and how to regain control — this book is a must-read.