Hormone Lab

Fatigue, mood shifts, disrupted sleep — these signs can point to cortisol running too high or too low. Here's how to tell the difference, and what to do next.

Blood and saliva cortisol tests both measure cortisol — but they don't measure the same thing. Learn how each method works, what each one is designed to tell you, and how to choose the right test for your goals.

Rhythm Review shows you common trends in your cortisol rhythm across mornings, evenings, and full days so you can see how your body manages stress across each day.

The Eli app now classifies your cortisol patterns into a Stress Status—so you can finally answer the question you've been asking: "Am I actually stressed?"

A redesigned app experience that turns your cortisol data into personalized, actionable insights — from daily actions to tag trends and notable moments.

Cortisol isn't a fixed number—it's a rhythm that naturally fluctuates, falling gradually from morning to night. When you get an unexpected reading, it's important to consider the context around it, since factors like timing, recent stress, sleep, and collection technique all impact your results. 

The new Testing Challenges feature provides six structured testing protocols—from establishing your cortisol baseline to assessing workout recovery and specific stressors—to turn your Hormometer™ data points into actionable insights for optimizing your daily routine.

Your master stress hormone controls energy, sleep, and recovery—when the rhythm breaks, everything feels harder.

Your score (0-100) is a daily pattern metric that shows how well your entire cortisol rhythm aligns with a healthy, optimal pattern for your time of day.

The 30-minute window before testing—no food, drinks (except water), brushing teeth, or smoking—ensures clean saliva and captures your complete cortisol response for accurate, reliable results.

Real-time hormone insights in 3 simple steps: saturate the pad for 60 seconds, pull until the blue dot shows, and wait 20 minutes for your results

Your diurnal curve is your complete daily cortisol rhythm—a powerful pattern that governs your energy, sleep, and stress response.