We unpack the science of cortisol—the hormone often blamed for everything from weight gain to burnout—and explain why it’s essential for survival. Cortisol isn't just your stress hormone—it’s your wake-up call, your emergency response system, and the reason you’re ready for a nap at 3 p.m. From saber-toothed tigers to modern-day deadlines, our stress response hasn’t changed much, even if our stressors have. We explore the difference between healthy stress and chronic stress, how cortisol affects mood, sleep, immunity, and metabolism, and why “adrenal fatigue” isn’t something to worry about. We share practical, evidence-based ways to manage stress—from prioritizing sleep and social connection to spending time in nature (and yes, petting a cat). Dr. Gillian Goddard also explains the rare condition Addison’s disease and what happens when the body can't produce enough cortisol. The Savvy Short: you don't need to “fix” your cortisol—you need tools to help your body and mind navigate life’s inevitable stressors.

In this episode, Dr. Gillian Goddard mentions The Human Connectome Project. Learn more at humanconnectome.org.

Note that Addison's disease is also known as primary adrenal insufficiency.

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This episode was produced and edited by Erin Stein. Music: “All We Live For (instrumental)” by Wolfclub licensed through Audiio.com. Intro and outro edited, and video created, by Ian Mayer. The Savvy Patient logo by Amanda Spielman.