By Paul Muchowski, Ph.D. Founder & CEO/CSO, Defined Sleep | Former UCSF Professor of Neuroscience

An estimated 50 to 70 million American adults have chronic sleep problems. What I have learned as a neuroscience researcher is that most people are not struggling with sleep because they need a stronger pill. They are struggling because the tools they are using do not address what is actually broken.

Here is the core issue: you can sleep for eight hours and still wake up exhausted. That is because restorative sleep depends less on total duration and more on time spent in deep sleep (slow-wave sleep) and REM sleep — the stages responsible for physical repair and immune function, memory consolidation, and emotional regulation. If those stages are compressed or disrupted, eight hours might as well be four.

This piece is my attempt to walk through the non-pharmaceutical approaches to insomnia that have actual research behind them — what works, what partially works, and what the limitations are. I will be direct about where the evidence is strong and where it is not.

 

Why So Many People Are Moving Away from Sleep Medications

Prescription sleep medications — benzodiazepines, Z-drugs like zolpidem, sedating antidepressants — can be effective for short-term crises. But they work by suppressing consciousness, and that is a fundamentally different thing than supporting the brain's natural sleep process.

Healthy sleep is active and precisely regulated. Throughout the night, your brain orchestrates transitions between light sleep, deep sleep, and REM sleep in a specific architecture. Many sedatives disrupt that architecture — benzodiazepines increase stage 2 non-REM sleep while reducing time in deep slow-wave and REM stages. You are knocked out, but your brain is not doing the work it needs to do.

The well-documented concerns are real: tolerance and dependence with long-term use, rebound insomnia on discontinuation, next-day cognitive impairment, and increased fall and fracture risk for adults over 50. A meta-analysis in the BMJ found that an adverse event was more than twice as likely as improved sleep quality in older adults taking sedatives. For adults managing stress, hormonal changes, and high cognitive demands, those trade-offs often feel untenable. I understand why people are looking for something different. 

 

Behavioral Approaches: What the Evidence Supports

Cognitive Behavioral Therapy for Insomnia (CBT-I)

If I could recommend one thing to every person with chronic insomnia, it would be CBT-I. The American Academy of Sleep Medicine recognizes it as the first-line treatment for chronic insomnia — a strong recommendation based on 49 studies showing clinically meaningful improvements. It works by reducing sleep-related anxiety, restructuring unhelpful beliefs about sleep, and improving sleep efficiency through stimulus control and sleep restriction.

The caveat: CBT-I requires time, consistency, and access to a trained provider. Treatment typically involves four to eight sessions. Those are real barriers. Not everyone has weeks to commit to a structured program, and not everyone lives near a specialist. But if you can access it, start there.

Sleep Hygiene

Sleep hygiene matters, but I want to be honest: on its own, it is rarely sufficient. Maintaining consistent sleep and wake times, getting morning light exposure, keeping your bedroom cool (mid-to-high 60s Fahrenheit), limiting alcohol, and cutting caffeine after early afternoon — these practices remove friction from the sleep process. They create the conditions for good sleep. But for someone with genuine insomnia, addressing sleep hygiene alone is like telling someone with a broken bone to eat more calcium. It is not wrong, but it is incomplete. Sleep hygiene tends to be most effective when combined with structured therapy or biologically supportive tools.

Breathwork and Mindfulness

For stress-related insomnia, these are underrated. Controlled breathing and mindfulness practices reduce hyperarousal — the state where your nervous system is stuck in "on" mode at bedtime. A meta-analysis of randomized controlled trials found that mindfulness meditation significantly improved total wake time and sleep quality, with the strongest effects when anxiety is a primary driver. These practices will not fix disrupted sleep architecture on their own, but they address one of the most common upstream causes.

Light Therapy

Light is the strongest signal your body uses to set its circadian clock. Morning bright-light exposure can meaningfully improve sleep timing, especially for people with delayed sleep phase syndrome or shift-worker related disruption — a meta-analysis confirmed its effectiveness for circadian rhythm sleep disorders and insomnia. It is simple, free if you can get outside, and the science is solid.

 

Supplements and Natural Compounds: An Honest Assessment

Magnesium, Glycine, L-Theanine, and GABA

These are the compounds you will see in most natural sleep formulations. Magnesium supports nervous system regulation through dual action as an NMDA receptor antagonist and GABA-A receptor potentiator. Glycine helps modulate core body temperature — it acts on NMDA receptors in the suprachiasmatic nucleus to promote vasodilation and heat loss, facilitating sleep onset. L-theanine promotes alpha-wave brain activity associated with calm focus, as demonstrated in a randomized, triple-blind, placebo-controlled crossover study. GABA is the brain's primary inhibitory neurotransmitter, though whether oral GABA supplements cross the blood-brain barrier remains debated.

Each has some evidence for supporting relaxation and sleep onset. But here is where I will be direct: the evidence that any of these, used alone, meaningfully improves deep or REM sleep is limited. Many people feel calmer. Fewer wake up feeling genuinely restored. There is an important difference between those two outcomes.

Melatonin

Melatonin is a timing signal, not a sleep quality enhancer. It tells your brain when to prepare for sleep, which makes it useful for jet lag and circadian misalignment. But it does not increase deep or REM sleep — polysomnographic studies confirm that sleep structure is not affected by melatonin supplementation. We intentionally left melatonin out of the Defined Sleep formulation for these reasons. Furthermore, a recent study by the American Heart Association indicated that long-term use of melatonin is associated with major negative health effects. For this and other reasons, the American Academy of Sleep Medicine does not recommend the use of melatonin to treat chronic insomnia. 

Valerian, Chamomile, and Ashwagandha

I get asked about these supplements constantly, so let me be specific. Valerian root is one of the most studied herbal sleep aids, and the results are genuinely mixed. A systematic review and meta-analysis examined five studies using polysomnographic recordings and found no consistent, statistically significant improvements in any objective sleep parameter — and significant methodological problems across the literature. Chamomile has mild anxiolytic properties and may help with relaxation, but objective sleep measurements — total deep sleep, REM time — have not shown robust improvement. Ashwagandha shows more promise: a meta-analysis of five randomized controlled trials found a small but significant effect on subjective sleep quality, with the strongest results at doses of 600 mg per day or higher for eight weeks or longer — but these were subjective outcomes measured by questionnaires, not objective architectural improvements.

The broader issue with multi-herb blends is reproducibility. Many products combine several plants into proprietary formulations without clear rationale for dosing ratios. The idea of synergy is appealing, but without rigorous clinical testing at defined doses, you are introducing variability that makes it hard to know what is actually working — or not.

 

CBD and Terpenes: Why I Built a Formulation Around Them

CBD (cannabidiol) caught my attention as a neuroscientist because it operates through a mechanism that is fundamentally different from sedatives. It interacts with the endocannabinoid system — a regulatory network involved in stress response, sleep stability, and circadian signaling. Rather than suppressing brain activity, CBD appears to help reduce nighttime hyperarousal and support sleep continuity at least in part through anxiolytic pathways. 

Terpenes — aromatic compounds found in fruits and vegetables — add another dimension. Specific terpenes like myrcene and linalool have demonstrated calming and sedative-hypnotic properties in preclinical studies: myrcene increased sleeping time through serotonergic pathways, and linalool produced marked sedative effects through glutamatergic NMDA receptor modulation. Our formulation combines 300 mg of THC-free CBD isolate with eight carefully selected terpenes. The combination is patent-pending.

But I did not build Defined Sleep on a hypothesis. I built it on a clinical trial.

 

The Clinical Evidence

We ran an FDA-registered, double-blind, placebo-controlled, randomized crossover Phase 2 trial — meaning each participant served as their own control, one of the strongest designs for reducing variability. The study is registered on ClinicalTrials.gov (identifier: NCT05233761) and was published in the Journal of Clinical Sleep Medicine (DOI: 10.5664/jcsm.11324), a peer-reviewed journal sponsored by the American Academy of Sleep Medicine.

What the data showed:

• Up to a 2x average increase in deep and REM sleep over a month in some participants, as measured by wrist-worn sleep-tracking devices.

• No adverse events reported. No effects on heart rate or heart rate variability.

• Participants who slept during the day — shift workers, for example — were particularly responsive to the treatment.

To my knowledge, no other CBD product has published peer-reviewed evidence of increasing deep and REM sleep. That is not a marketing claim — it is a gap I spent years trying to close.

 

Lifestyle Factors That Actually Move the Needle

No supplement replaces the basics. Here is what the evidence consistently supports:

Exercise timing. A systematic review found that long-term morning exercise tended to decrease cortisol concentrations after awakening and improve sleep quality, while evening exercise did not necessarily impair sleep — though high-intensity workouts close to bedtime can raise core body temperature and cortisol. Morning or early afternoon exercise tends to be most supportive of restorative sleep.

Light management. Morning bright light anchors your circadian clock. Evening screen reduction supports melatonin signaling. These are not sedative interventions — they are removing obstacles.

Temperature. A cooler bedroom facilitates both sleep onset and deeper sleep. A review in Frontiers in Neuroscience found that sleep is most efficient at nighttime ambient temperatures between 20 and 25 °C (roughly 68 to 77 °F). Your core body temperature needs to drop for sleep to initiate properly — a decline that is naturally linked to sleep onset.

Stress and cortisol management. Chronic stress elevates cortisol, which delays sleep onset and fragments sleep throughout the night — insomnia is associated with a 24-hour increase in cortisol secretion, consistent with central nervous system hyperarousal. Mindfulness, breathwork, and gentle evening routines are not soft interventions. They are addressing a concrete physiological barrier.

Pre-sleep rituals. Reading, journaling, breathing exercises, stretching — these signal predictability and safety to the brain. They reduce cognitive arousal. They will not fix broken sleep architecture alone, but they reinforce the conditions that let everything else work.

 

A Note on Shift Workers

Shift work forces sleep into a window that conflicts with the body's internal clock. Melatonin gets suppressed at the wrong times, cortisol spikes when it should not, and deep and REM sleep nearly always suffer — even when total hours look adequate on paper. This is one of the hardest sleep problems to solve.

One of the findings from our clinical trial that surprised me: participants who slept during the day showed particularly strong responses to the formulation. Although it is not clear yet if CBD modulates your circadian clock, it appears to help the brain disengage from hyperarousal even when sleep timing is biologically challenging. For shift workers, combining strict light control (blackout curtains, eye masks), consistent sleep windows, temperature reduction, and non-sedating biological support may help preserve restorative sleep stages despite circadian disruption.

 

Using Wearables to Track What Matters

Oura Ring, Fitbit, WHOOP, and Apple Watch all have algorithms for estimating sleep stages. They are not the equivalent of medical-grade polysomnography — they estimate rather than directly measure brain wave activity — but they are useful for tracking trends over time. Night-to-night variability is expected; what you are looking for is a consistent pattern.

My advice: stop fixating on total hours. Start watching your deep and REM sleep percentages, and track these over time. That is where the real signal is. We used wrist-worn sleep-tracking devices in our clinical trial for this exact reason — they are accessible, non-invasive, and increasingly validated for trend-level insights.

 

Safety, Quality, and What to Watch For

CBD is generally well-tolerated, according to the World Health Organization, which found no effects indicative of abuse or dependence potential. But CBD can interact with certain medications — particularly some SSRIs, blood thinners, and anticonvulsants — because it inhibits cytochrome P450 enzymes (CYP2C9 and CYP3A4) involved in metabolizing these drugs. If you take any of these, talk to your doctor before starting a CBD product.

Quality is the other critical variable. The CBD market is full of products with vague ingredient lists, proprietary blends without dosing clarity, and no third-party verification. Red flags include exaggerated claims, no publicly available Certificates of Analysis, and no batch traceability. You cannot know whether a product contains what it says without independent testing.

We publish COAs for every batch of Defined Sleep. Cannabinoid content, terpene profiles, contaminant testing — it is all available. I believe this is the minimum standard for any product that claims clinical backing.

 

Putting It Together: How to Think About Your Sleep Plan

The most effective approach for most adults combines behavioral foundations with biological support. Start by identifying where your sleep actually breaks down. Do you struggle to fall asleep? That often points to stress, hyperarousal, or circadian misalignment. Do you fall asleep fine but wake up feeling unrested? That points to disrupted sleep architecture — insufficient time in deep and REM stages.

Lifestyle changes create the conditions for sleep. CBT-I, if accessible, addresses the behavioral and psychological layer. And a clinically validated, non-sedating supplement can help optimize the biology — supporting the actual sleep stages that determine whether you wake up restored or not.

Be wary of anything promising instant sedation or knockout effects. That will not produce healthy sleep. That is simply unconsciousness. Real sleep health is about restoration — and restoration requires architecture, not suppression.

Drug-free does not mean unscientific. It means aligning your interventions with how sleep biology actually works — supporting the process rather than overriding it. That is the principle I built Defined Sleep around, and it is what the clinical data support.

If you are curious, we offer a trial-size pack of 10 capsules. No melatonin, no THC, no reported side effects in our clinical study. The published trial data are publicly available. I would encourage you to read them.

— Paul Muchowski, Ph.D. Founder & CEO/CSO, Defined Sleep Former Professor, UCSF

 

FAQs

1. What are drug-free remedies for insomnia?

Drug-free remedies include lifestyle changes, relaxation techniques, and natural approaches aimed at improving sleep without medication.

2. Can insomnia be treated without sleeping pills?

Yes, many people manage insomnia through behavioral changes, sleep hygiene practices, and natural support methods.

3. What lifestyle changes can help improve insomnia?

Maintaining a consistent sleep schedule, reducing caffeine intake, managing stress, and limiting screen time before bed can help improve sleep.

4. Are natural supplements useful for insomnia?

Some supplements may support relaxation and sleep quality, though effectiveness can vary among individuals.

5. What is sleep hygiene?

Sleep hygiene refers to healthy habits and environmental factors that promote consistent and restful sleep.

6. How long do drug-free insomnia remedies take to work?

Results vary, but consistent lifestyle and behavioral changes may show improvements within a few weeks.