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All day data
Continuous, not a snapshot — tracks cortisol all day, every day
Needle-free
Waterproof, no needles — reads straight from sweat through the skin
Adapts to your wearable
Works with the wearable you already have — Apple Watch, WHOOP, or Fitbit
Feature 04
14 days of continuous wear per sensor patch
- Free shipping
- 30-day returns
- Access founder price at ship time
- 2-year warranty
As seen & backed by
Lab-quality results without the lab cost.
A single saliva cortisol test at a lab costs anywhere from $90 to $440, depending on whether it's one sample or a multi-point panel — and either way, it only shows you one day. Lume tracks your rhythm continuously, for less than the cost of a single lab visit.
Measurable impact
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80%
of users reported improved sleep quality using Lume's personalized cortisol insights.
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83%
boost in reported daily focus and cognitive performance when tracking with Lume.
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25%
average drop in cortisol levels measured after a single yoga session.
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134%
average spike in cortisol levels tracked during one high-intensity cycling class.
What you're getting.
We read your hormones from a few drops of sweat, no needles, no blood. The Lume app shows your patterns as they happen.
Personal calibration turns every reading into an accurate picture of your hormone rhythm throughout the day.
Our sensor is a platform. One device can measure several hormones at once, building a deeper picture of your health.
Heart rate, sleep and activity from your wearable feed a hormone model built around you.
We read your hormones from a few drops of sweat, no needles, no blood. The Lume app shows your patterns as they happen.
Personal calibration turns every reading into an accurate picture of your hormone rhythm throughout the day.
Our sensor is a platform. One device can measure several hormones at once, building a deeper picture of your health.
Heart rate, sleep and activity from your wearable feed a hormone model built around you.
A preview of
your dashboard.
Visualized data — a concrete look at what tracking with Lume actually looks like day to day.
See your rhythm
Your baseline circadian pattern, and the everyday factors shaping it.
Find what works
Lume learns how your body responds to light, sleep, exercise, and routine — and adapts as you go.
Live in sync
Guidance that helps you build a routine around your own rhythm, not someone else's.
What members of Lume’s early access programs are saying:
Specifications
- Dimensions
- 100%
- Weight
- 100%
- Battery life
- 100%
- Water resistance rating
- 100%
- Sensors
- 100%
- App compatibility
- iOS / Android
- Materials
- 100%
- Band sizes
- 100%
Reservation questions, answered.
Cortisol is your body's main stress hormone, but it also plays an important role in your circadian health. It shapes your energy, focus, sleep, and mood throughout the day. When its rhythm is off, you can feel “flat" or “off” because your body's chemistry is out of balance.
Hours aren't the whole story. Cortisol should rise in the morning and fall at night. When that pattern shifts, sleep doesn't restore our energy in the same way.
Yes. Elevated cortisol changes how your body regulates appetite, stores fat, and metabolizes glucose. That's partly why it can feel that your weight is stuck when you are doing all the right things.
Struggling to wake up. Waking at 3am and not getting back to sleep. Feeling "tired but wired." Afternoon energy crashes. Weight that won't budge. Or just not feeling like yourself. Everyone's pattern is different, which is why seeing your own matters.
Your circadian rhythm is your body's internal ~24-hour clock. It governs many of your body's processes including when hormones like cortisol rise and fall, sleep, energy, and metabolism, which is why tracking it can reveal so much about why your days feel the way they do.
No. Most wearables estimate "stress" from heart rate and compare you with population averages. Lume is built around cortisol itself, and a few of your own saliva samples calibrate it, so what you see is your rhythm, not an average. It adds to the wearable you already have instead of replacing it. Next, we're building toward reading cortisol directly from sweat, the same direct approach a continuous glucose monitor takes, without the needle.
Yes, and the field is moving fast. Sweat carries hormones like cortisol, and research groups, including scientists on our team, have built sensors that detect them without blood draws or lab visits. Lume's first product estimates your cortisol rhythm from wearable signals, calibrated to gold standard cortisol measurement from your saliva samples, while our lab develops sensors that read cortisol directly from sweat.
A typical blood or saliva test gives you one data point. Lume shows the pattern: how cortisol moves across your whole day, not a single reading. And that's where most of the important information lives.
Let’s collaborate
You are welcome to reply directly to this email, or instead schedule an exploratory call with Lume’s co-founder Jonathan.
Sources
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Shuster M (2014-03-14). Biology for a Changing World, with Physiology (2nd ed.). New York: W. H. Freeman. ISBN 978-1-4641-5113-2. OCLC 884499940
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Shuster M (2014-03-14). Biology for a Changing World, with Physiology (2nd ed.). New York: W. H. Freeman. ISBN 978-1-4641-5113-2. OCLC 884499940
-
Shuster M (2014-03-14). Biology for a Changing World, with Physiology (2nd ed.). New York: W. H. Freeman. ISBN 978-1-4641-5113-2. OCLC 884499940
-
Shuster M (2014-03-14). Biology for a Changing World, with Physiology (2nd ed.). New York: W. H. Freeman. ISBN 978-1-4641-5113-2. OCLC 884499940
-
Shuster M (2014-03-14). Biology for a Changing World, with Physiology (2nd ed.). New York: W. H. Freeman. ISBN 978-1-4641-5113-2. OCLC 884499940
-
Shuster M (2014-03-14). Biology for a Changing World, with Physiology (2nd ed.). New York: W. H. Freeman. ISBN 978-1-4641-5113-2. OCLC 884499940