Cortisol Hormometer™
Hormones device

Cortisol Hormometer™

by Eli Health

The first instant hormone monitoring system. A saliva-based Hormometer™ paired with the Eli app gives a live feed of your cortisol rhythm, so you can see how stress, sleep, and recovery shift from hour to hour.

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20 min
Saliva to result
97%
Accuracy vs lab methods
First
Instant hormone monitoring system
FSA/HSA
Eligible

Clinical Note

Cortisol dysregulation shows up in many of my Long COVID patients. Research consistently finds blunted morning cortisol and disrupted diurnal rhythm in post-viral illness, which maps onto the fatigue, brain fog, and sleep disruption patients describe. The Hormometer™ gives patients real-time visibility into their own cortisol pattern, supporting the recovery work we do together in clinic.

How It Works

Cortisol follows a daily rhythm that drives energy, focus, recovery, and sleep. The Hormometer™ makes that rhythm visible through three connected pathways:

Diurnal Rhythm Visibility

Cortisol follows a natural daily curve, peaking in the morning and falling toward evening. The Hormometer™ charts your actual rhythm against the expected pattern, so disruption becomes visible instead of guessed at.

Stress and Recovery Context

Spot-testing after workouts, stressful events, or poor sleep shows how your body is responding in real time. Patterns emerge across days and weeks, linking lifestyle inputs to measurable biological signal.

Lifestyle Adjustment Feedback

Changes to sleep timing, light exposure, meal timing, or training load can be tested against your own cortisol data. Instead of guessing whether a change helped, you measure it.

Instant Cortisol Visibility for Long COVID Recovery

Cortisol is the body’s primary stress hormone, shaping how you wake up, how you handle load, how you recover, and how you sleep. It follows a daily rhythm called the diurnal curve, peaking roughly 30 minutes after waking and falling gradually across the day. When that rhythm flattens or inverts, it shows up everywhere: morning fatigue that coffee cannot fix, wired-but-tired evenings, restless sleep, blunted recovery from exercise, thinning resilience to ordinary stress.

Long COVID patients often live inside that flattened curve. Published research has found lower morning cortisol and disrupted HPA axis signaling in post-viral illness, mirroring patterns seen in myalgic encephalomyelitis. The symptoms line up: the exhaustion on waking, the crash after mild exertion, the sleep that never quite restores.

The Cortisol Hormometer™ makes that rhythm visible.

How It Works

You soak the test pad with a saliva sample, pull the tab, and scan the strip in the Eli app. Roughly 20 minutes later, the app shows a cortisol score from 0 to 100 calibrated to the expected level for that time of day. Higher scores mean closer alignment with your body’s optimal cortisol rhythm.

A lab draw gives one data point, hours after collection. The Hormometer™ gives a live feed across the day. Morning and evening tests capture your baseline curve. Spot tests after a hard workout, a stressful call, or a rough night show how your body is actually responding in the moment. Across days and weeks, the app builds a personal hormone profile: diurnal rhythm against the expected curve, trend graphs, and lifestyle log prompts that surface what is driving the numbers.

Eli reports 97% accuracy compared with laboratory reference methods. The company positions the product as the first instant hormone monitoring system available direct to consumers.

Why Dr. Groysman Recommends Tracking Cortisol

Dr. Groysman treats Long COVID patients at COVID Institute. HPA axis dysregulation is one of the six mechanisms he works through with every patient, and cortisol is the single most accessible biomarker in that system.

“Patients tell me their energy is unpredictable, their sleep is broken, and their stress tolerance is gone. Those are cortisol stories. Blood draws give me one snapshot hours after collection, which is not enough to see what is actually happening. When a patient can test their own cortisol in the morning, again in the evening, after a hard day, and before a restless night, we suddenly have a map. The Hormometer™ turns a vague symptom into a measurable pattern, and that changes what we can do about it.”

He positions the Hormometer™ as a measurement tool rather than a treatment. The value sits in pattern visibility: once the rhythm is legible, sleep timing, light exposure, pacing, and training load can be adjusted and measured rather than guessed.

Who May Benefit

The Cortisol Hormometer™ may be useful for Long COVID patients experiencing:

  • Morning fatigue that does not improve with caffeine or more sleep
  • Wired-but-tired evenings and difficulty falling asleep despite exhaustion
  • Post-exertional malaise or slow recovery from ordinary activity
  • Blunted stress tolerance compared to pre-illness baseline
  • Brain fog that tracks with sleep and stress patterns
  • A wish to test lifestyle changes against an objective signal rather than how they feel day to day

Important Context

The Hormometer™ is a wellness product for lifestyle insights. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any medical condition. Suspected cortisol disorders such as Addison’s disease or Cushing’s syndrome need evaluation through your physician and laboratory testing. Bring any unexpected patterns you see in the Eli app to your care team.

The app currently supports iPhone (iOS 15+). Android support is on the roadmap.

Cortisol Hormometer™ lifestyle View on Eli Health

Device Specifications

Biomarker tracked
Cortisol (saliva)
Result time
~20 minutes from sample to app
Accuracy
97% vs. laboratory reference methods
Test format
Saliva sample on Hormometer™ test strip, scanned via phone camera
App
Eli app for iPhone (iOS 15+); Android coming soon
Features
Cortisol score (0-100), diurnal rhythm tracking, trend graphs, personalized insights, lifestyle log
Purchase options
One-time packs and quarterly subscriptions available. See current options at checkout.
Reimbursement
FSA/HSA eligible
Regulatory status
Wellness product. Not a medical device.

What's Included

Hormometer™ cortisol test strips and access to the Eli app. 10% affiliate discount applies at checkout through the link on this page.

Cortisol Hormometer™ box contents

Frequently Asked Questions

What is the Cortisol Hormometer™?
The Hormometer™ is a saliva-based Hormometer™ test strip that pairs with the Eli app. You soak the pad with a saliva sample, pull the tab, scan the strip with your phone, and see your cortisol result in the app in roughly 20 minutes. It is the first instant hormone monitoring system available direct to consumers.
Why track cortisol for Long COVID recovery?
Cortisol sits at the center of the HPA axis, which governs stress response, inflammation, energy, and sleep. Long COVID research has documented blunted morning cortisol and disrupted diurnal rhythm in many patients, aligning with the fatigue, brain fog, and sleep disturbance they report. Seeing your own rhythm makes those patterns visible, so lifestyle changes can be targeted rather than guessed.
How often should I test?
For baseline tracking, Eli recommends testing twice a day: once 30 minutes after waking to capture the natural peak, and once 1 to 2 hours before bed to capture the low point. Spot tests after workouts, stressful events, or restless nights add context. More frequent testing over one or two days can map a full curve. Current pack sizes and subscription options are listed on the Eli Health checkout page.
How accurate is it compared to a lab test?
Eli reports 97% accuracy compared with laboratory reference methods. A lab draws a single snapshot hours after collection. The Hormometer™ gives a live feed of your rhythm across the day, which is what matters for hormones that change every hour.
Is this a medical device?
No. The Hormometer™ is a wellness product for lifestyle insights. It is not intended to diagnose, treat, cure, or prevent any medical condition. If you suspect a cortisol disorder such as Addison's disease or Cushing's syndrome, work with your physician.
What do I need to do before testing?
Avoid eating, drinking anything other than water, brushing your teeth, or smoking for at least 30 minutes before a test. Skip biotin supplements for 24 hours. Soak the sponge fully with your saliva sample, pull the tab firmly until the blue dot is fully revealed, then scan in the app.
Does it work with Android?
The Eli app launched on iPhone first (iOS 15+). Android support is on the roadmap. If you do not have an iPhone, wait for Android availability before ordering.
What do I get with the affiliate link?
Ordering through the link on this page applies a 10% discount at checkout. Dr. Groysman receives a small affiliate commission at no extra cost to you. The recommendation is based on clinical relevance, not the commission.
Can I use this alongside other treatments?
Yes. The Hormometer™ is a measurement tool, not a treatment. Dr. Groysman considers it complementary to the work done in clinic: sleep, light exposure, training load, pacing, and nutrition can all be tested against your own cortisol data. Keep your care team informed about any tools you are using.
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This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary.