Eli Edit

Cortisol isn't the enemy. It's your body's first responder. Here's how the stress response actually works, and how to recognize when it stops switching off.

We analyzed 12 months of cortisol data across 15 major North American cities. What we found points to a signal most people have never think to check on: their strength of their cortisol curve.

Learn how your body's internal 24-hour clock regulates hormones like cortisol, what happens when that rhythm is disrupted, and how simple daily habits can help restore alignment.

CES 2026 made it clear that accessible health tech is the future. Read press highlights about Eli from the Verge, Tom’s Guide, The Independent, and more.

Hormometer™ is expanding beyond cortisol. Pre-order the world's first instant testosterone and progesterone tests today. Shipping end of Q1 2026.

Fasting can build metabolic resilience when aligned with the body’s diurnal cortisol curve. Short, recoverable stress supports energy balance and repair, while chronic elevation undermines it. Because fasting isn’t one-size-fits-all—especially for many women—tracking cortisol levels with Hormometer™ helps reveal when your routine drives adaptation and when it signals overload.

Cortisol connects stress, energy, and metabolism. When balanced, it supports focus and digestion; when elevated, it slows metabolism and redistributes fat. This article breaks down how stress reshapes energy use—and how visualizing cortisol with Hormometer™ can help restore balance.

Discover how cortisol—the body’s key stress hormone—links energy, recovery, and skin health. When balanced, it supports focus and repair; when elevated, it accelerates aging by breaking down collagen. Explore how biohackers use cortisol insights to fine-tune habits like cold exposure, red light, and sleep for healthier skin and sustained vitality.

Wearables show activation; Hormometer™ shows recovery. Adrenaline drives short-term stress, while cortisol reveals how well your body resets. Together, they give a fuller view of balance and resilience.

Dr. Andrew Huberman explains why cortisol is an energy-deploying hormone, not just a stress signal. Learn how daily habits shape your rhythm, and how Hormometer™ helps you track snapshots to visualize patterns in stress, sleep, and focus.