Quick answer: Sleep is when your brain clears waste, your body repairs tissue and your hormones reset. The biggest improvements usually come from habits: morning light, a consistent schedule, a cool dark room and less evening screen time. Magnesium, glycine, L-theanine, chamomile, valerian and reishi can gently support sleep, and low-dose melatonin is best for timing problems such as jet lag.
Key takeaways
Sleep is when the brain clears waste, the body repairs tissue and hormones reset.
Morning light, a consistent schedule, a cool dark room and less evening screen time usually make the biggest difference.
Magnesium, glycine, L-theanine and gentle herbs can support sleep, while low-dose melatonin is best suited to timing issues like jet lag.
Why sleep matters
During sleep, the brain’s glymphatic system clears waste during sleep, and growth hormone peaks to repair tissues. Memories consolidate, and cortisol drops to its daily low.
Sleep habits come first
Get morning sunlight within an hour of waking, and keep a consistent sleep and wake time. Dim the lights and limit screens for an hour or two before bed, and keep the bedroom cool, dark and quiet. Finish caffeine by noon and eat dinner a few hours before bed.
Supplements that may help
Magnesium glycinate supports relaxation (see who should consider magnesium), and glycine may help you fall asleep, possibly by lowering core body temperature. L-theanine calms without sedation, and chamomile (apigenin) is a gentle calming herb. Valerian, lemon balm and passionflower are traditional calming herbs too.
Reishi mushroom is traditionally used for calm and sleep, and phosphatidylserine may help when evening cortisol runs high. Melatonin is best for jet lag and shift work, and low doses often work as well as high doses.
Amounts should be individualized.
Is testing helpful?
If sleep problems persist, looking at cortisol patterns, ferritin, magnesium and thyroid can help, and a sleep study is important if sleep apnea is possible. Functional labs are optional. They can be helpful in more complex cases.
Sleep and healthy aging
Deep sleep is when the body does much of its repair: clearing damaged proteins, repairing DNA, supporting mitochondria and resetting hormone signals. Chronic short sleep is linked with faster biological aging. Related: sleep optimization for longevity and the glymphatic system.
Safety
Sleep supplements can add to the effects of alcohol and sedating medications. Valerian can cause morning grogginess in some people. Melatonin is not recommended in pregnancy without guidance. Do not drive if you feel drowsy.
When to see a naturopathic doctor
It may be time to see a naturopathic doctor if you have had trouble falling or staying asleep for more than a few weeks, or if you wake unrefreshed despite enough hours in bed. The same is true if your sleep problems came with perimenopause, stress or mood changes, or if you rely on sleep aids and want a gentler plan.
See a medical provider promptly for loud snoring with pauses in breathing, gasping at night, or falling asleep while driving. These can be signs of sleep apnea and need evaluation.
What the research shows
Melatonin’s effect is real but modest. A 2013 meta-analysis by Ferracioli-Oda and colleagues of placebo-controlled trials in people with primary sleep disorders found that melatonin helped people fall asleep about 7 minutes faster and sleep about 8 minutes longer, with modestly better sleep quality. Longer trials and higher doses showed somewhat larger effects.
In a 2012 double-blind trial by Abbasi and colleagues, 46 older adults with insomnia took 500 mg of magnesium or a placebo daily for eight weeks. Compared with placebo, the magnesium group improved insomnia severity scores, sleep efficiency and time to fall asleep, with higher melatonin and lower cortisol, although total sleep time did not differ significantly. The trial was small and in older adults who may have had low magnesium intake.
Glycine was tested in sleep-restricted adults by Bannai and colleagues in 2012. Healthy volunteers slept 25% less than usual for three nights and took 3 grams of glycine or a placebo before bed. With glycine, they reported significantly less daytime fatigue, a trend toward less sleepiness, and performed better on an attention test. The study was small and short, and it tested sleep loss rather than insomnia.
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Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Is my sleep problem more about falling asleep, staying asleep or timing, and what would fit best?
Is a natural sleep aid a reasonable choice alongside my current medications and supplements?
Would it be worth checking any labs before I try a natural sleep aid, or is my history enough to decide?
What would tell us that a natural sleep aid is working well for me, and how long should we wait before reviewing it?
Frequently asked questions
What is the best natural sleep aid?
It depends on why you cannot sleep. Magnesium and glycine help many people relax; melatonin helps with timing problems.
Is melatonin safe every night?
Short-term use is generally considered safe for adults. Lower doses often work well. Talk with your provider about long-term use.
Why do I wake at 3 a.m.?
Common causes include blood sugar dips, stress hormones, alcohol, perimenopause, sleep apnea and needing to urinate.
Can supplements replace treatment for insomnia?
Cognitive behavioral therapy for insomnia (CBT-I) is effective and is often recommended as the first approach to try. Supplements can support it.
Sources
- Ferracioli-Oda E, Qawasmi A, Bloch MH. Meta-analysis: melatonin for the treatment of primary sleep disorders. PLoS One 2013. PMID: 23691095. https://pubmed.ncbi.nlm.nih.gov/23691095/
- Abbasi B, Kimiagar M, Sadeghniiat K, et al. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. J Res Med Sci 2012. PMID: 23853635. https://pubmed.ncbi.nlm.nih.gov/23853635/
- Bannai M, Kawai N, Ono K, et al. The effects of glycine on subjective daytime performance in partially sleep-restricted healthy volunteers. Front Neurol 2012. PMID: 22529837. https://pubmed.ncbi.nlm.nih.gov/22529837/
- Xie L, et al. Sleep drives metabolite clearance from the adult brain. Science 2013. PMID: 24136970. https://pmc.ncbi.nlm.nih.gov/articles/PMC3880190/
- Kawai N, et al. The sleep-promoting and hypothermic effects of glycine are mediated by NMDA receptors in the suprachiasmatic nucleus. Neuropsychopharmacology 2015. PMID: 25533534. https://pmc.ncbi.nlm.nih.gov/articles/PMC4397399/
- Herxheimer A, Petrie KJ. Melatonin for the prevention and treatment of jet lag. Cochrane Database Syst Rev 2002. PMID: 12076414. https://pubmed.ncbi.nlm.nih.gov/12076414/
- Trauer JM, et al. Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis. Ann Intern Med 2015. PMID: 26054060. https://pubmed.ncbi.nlm.nih.gov/26054060/
- MedlinePlus: Healthy Sleep
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
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