After 2+ tests, your Hormometer™ reveals something powerful: your complete cortisol rhythm. Not just isolated numbers—the full daily pattern that governs your energy, sleep, and stress response.
This is your diurnal curve.
What is a diurnal curve?
Your cortisol follows a 24-hour rhythm:
Morning: Sharp peak 30-60 minutes after waking (cortisol awakening response)
Day: Gradual decline through afternoon
Evening: Reaches lowest point by bedtime
This isn't random. A healthy curve looks like a wave—high morning energy, steady decline, low evening levels for sleep.
Why the pattern matters more than the number
A single test shows one moment. Your curve shows the whole story.
Example 1: Healthy rhythm
Morning: 8 ng/mL → Evening: 1 ng/mL
Clear peak-to-trough pattern. Energy rises naturally, winds down for rest.
Example 2: Flat curve
Morning: 3 ng/mL → Evening: 3 ng/mL
Chronically low across the day. "Tired but can't sleep."
Example 3: Elevated evening
Morning: 7 ng/mL → Evening: 6 ng/mL
Evening spike disrupts sleep. "Wired at night."
The numbers might look "normal" individually, but the pattern reveals dysregulation.
What your curve tells you
Strong morning peak + gradual decline:
Your rhythm is working. You wake with energy, wind down naturally.
Flat or blunted curve:
Chronic stress or burnout. Your body stopped responding properly to morning signals. Common symptoms: fatigue despite sleep, no morning energy.
Elevated evening cortisol:
Something's keeping you activated at night. Coffee too late? Chronic stress? Evening workouts? Your curve shows what your habits are doing.
Chaotic pattern (peaks at random times):
Severe dysregulation. Your circadian rhythm is disrupted—shift work, chronic insomnia, or severe stress.
How to use your curve
1. Identify your baseline pattern
Test morning, afternoon, evening across multiple days. What's your natural rhythm without interventions?
2. Test lifestyle factors
Add coffee at 8am, test at 8:30am. How does your curve change? Does the morning peak shift? Does it bleed into evening?
3. Track changes over time
Your curve isn't fixed. Better sleep hygiene, stress management, workout timing—watch your pattern shift as you optimize.
The curve shows what's working and what's breaking your rhythm.
Pattern recognition unlocks insight
One test = a snapshot.
Multiple tests = your rhythm.
Tracking over time = understanding what shapes your rhythm.
Your curve is the map. Your lifestyle factors are the variables. Hormometer™ shows how they connect.
Keep testing to reveal your full pattern. Your diurnal curve is your cortisol fingerprint—unique, informative, and changeable.
