Welcome to the very first issue of Deep Cycles, our quarterly newsletter.
I started Defined Sleep to answer a question that most sleep products won't even ask: not how do we knock you out, but how do we get you more of the sleep that actually restores you — the deep and REM stages the brain uses to repair tissue, consolidate memory, and clear metabolic waste? A clinical trial published in the Journal of Clinical Sleep Medicine gave us a rigorous answer. The science is real, and it belongs to you.
This quarter also marks another milestone: the Defined Sleep Podcast is live. Episode 1 is up on YouTube now, covering the subject I get asked about more than anything else — what sleep actually is, at a biological level, and why not all hours in bed are created equal. More on that below.
Every issue, we'll gather the best from our blog, press appearances, and the broader sleep science conversation — all in one place, no noise, no exaggeration. Just the data, and what it means for your nights.
Our FDA-registered, double-blind, placebo-controlled, crossover Phase 2 trial enrolled 125 adults with insomnia. Objective sleep architecture was measured by WHOOP wearable. The results, published in the Journal of Clinical Sleep Medicine, showed a proprietary CBD + terpene formulation — 300 mg CBD, zero THC, zero melatonin — can significantly increase the proportion of sleep spent in the stages that matter most.
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2×
Increase in deep & REM sleep
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~1 hr
More restorative sleep / night
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0
Adverse side effects reported
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| From Our Blog |
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July 15, 2025 · Dr. Paul Muchowski
It's 2 a.m. and you're staring at the ceiling. Paul responds to a New York Times roundup of in-the-moment tactics, then explains the harder problem: how to stay asleep and protect the deep and REM stages that actually restore you.
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November 10, 2025
What does "non-habit-forming" actually mean at the receptor level? Why benzodiazepines, antihistamines, and high-dose melatonin create dependency even when marketed as safe — and a framework for reading any supplement label critically.
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November 17, 2025
Melatonin tells your brain when to sleep. GABA enables how deeply you sleep. This piece untangles the two systems, explains why your 5 mg melatonin gummy may not be doing what you think, and maps a two-week self-experiment to identify what your sleep problem actually needs.
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November 30, 2025
Where the evidence is strong (faster sleep onset, subjective quality), where it's thin (deep and REM architecture), and when CBD + terpenes fills the gap magnesium leaves behind. A clear-eyed look at what the RCTs actually show.
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| On Medium |
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August 2025 · Paul Muchowski, Ph.D.
Every August, families rediscover that the brain's suprachiasmatic nucleus does not simply reset on command. Paul writes about his own household's annual recalibration and the neuroscience behind why teenagers and parents alike need weeks to shift their circadian phase for the school-year schedule.
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November 2024 · Authority Magazine
Authority Magazine traces Paul's path from a chemist's dinner table in suburban Chicago, through the neuroscience labs of UW and UCSF, to founding Defined Sleep. A strong entry point for anyone new to the story behind the science.
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| In the Media |
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CBS Atlanta · Focus Atlanta
Paul joins Focus Atlanta to explain why most sleep aids fail insomnia sufferers — and what the clinical trial data show about restoring the deep and REM stages that prescription sedatives suppress.
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GreenState · September 2024
GreenState reporter Cara Wietstock covers the JCSM findings, situating Defined Sleep within the broader conversation about cannabis and sleep — and why this study differs from the anecdotal reports the industry has long relied on.
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Brain Health Podcast · Episode 38
A neuroscience-heavy conversation about the glymphatic system, slow-wave sleep's role in Alzheimer's risk reduction, and how Defined Sleep was designed to let the brain do the repair work it performs in its deepest stages.
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Sleep Review · May 2024
Trade coverage of Defined Sleep's participation in the American Psychiatric Association annual meeting, where Paul presented clinical trial results to mental health professionals exploring non-pharmacological interventions for insomnia.
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| Podcast |
Podcast has launched.
| Ep. 01 |
The Architecture of Sleep
Most people think of sleep as a single event. It isn't. Every night, your brain moves through four distinct stages in repeating 90-minute cycles — each with its own biology, its own restorative function, and its own vulnerability to disruption. Paul walks through what actually happens from the moment you close your eyes to the moment your alarm goes off, and why the ratio of those stages matters as much as total hours in bed.
▶ Watch on YouTube
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| Ep. 02 |
Coming Soon
More episodes are in production. Subscribe to our YouTube channel and follow us on Instagram so you don't miss what's next.
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| A Note on the Name |
We're calling this edition Deep Cycles — a nod to the sleep stages that matter most and the rhythms that govern them. But we haven't settled on a permanent name yet. A few candidates we're weighing:
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Deep Cycles
Direct and clinical. Signals that this newsletter is about sleep architecture — the actual stages — not general wellness. Memorable and distinctively ours.
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| 02 |
Restorative
A single word that captures the entire mission: not sedation, not quantity — genuine biological restoration. Clean, distinctive, and easy to say.
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| 03 |
The Sleep Lab
Positions each issue as a dispatch from people who run experiments, not just read them. Appeals to readers who trust the scientific point of view.
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Stage Four
A knowing reference to slow-wave sleep — the deepest, most restorative stage. Resonates immediately with anyone who tracks their Oura Ring or WHOOP data.
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After Dark
Warmer and more consumer-friendly. Evokes the mystery and importance of what happens during the hours we're unconscious. Works well as a content brand across channels.
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We'd love to hear which name resonates. Reply to this email or find us on Instagram.