Top 5 — Ranked by Evidence
Strong
Melatonin
Time to fall asleep and total sleep
Sleep onset: 0.3–1 mg, 30–60 min before bed. Harder cases: up to 4 mg, 3 hours pre-be
Strong
Ashwagandha
Improved Sleep
KSM-66® root extract: 300-600 mg/day (most stress/sleep trials). Shoden®: 120-240 mg/
Moderate
L-Tryptophan
Less time awake after sleep onset at about 1 g a day or more
Research doses range from about 500 to 5,000 mg/day; sleep trials used 1,000 mg or more at bedtime. The 3–6 g/day mood doses are supervised research doses, not general-use recommendations.
Strong
Saffron Extract (Crocus sativus)
Better sleep quality in adults with poor sleep
Depression (most-studied): 30 mg/day standardized stigma extract × 6-8 weeks. PMS: 15
Moderate
L-Theanine
Sleep quality
200 mg/day in the 4-week healthy-adult trial; 400 mg/day in the stress and sleep trials; 450 to 900 mg/day in the anxiety trial, which was negative. No cited trial combined l-theanine with caffeine.
📈 Fastest Growing Sleep Health Ingredients
Branded forms with proprietary clinical data gaining adoption in sleep formulations.
Trending
Limited
Magtein® (Magnesium L-Threonate — Threotech)
Sleep: one questionnaire improved, tracked sleep did not
2 g/day (145 mg elemental magnesium), as 1 g in the morning and 1 g about 2 hours before bed,…
Trending
Limited
Tart Cherry Extract
Sleep quality improvement
Recovery: two 8 oz servings of tart cherry juice a day, or 30 mL of concentrate twice a day;…
Trending
Moderate
PEA — Palmitoylethanolamide
Faster sleep onset in one trial of adults with poor sleep
300 to 600 mg/day in the knee osteoarthritis, diabetic neuropathy and upper respiratory…
🔬 Future Sleep Health Ingredients to Watch
Lower current evidence but active research underway — these may become top picks within 2–3 years.
Watch
Limited
Venetron® (Rafuma / Apocynum venetum Leaf Extract)
Sleep: more deep sleep in one small brain-wave study
50 mg/day.
Watch
Limited
Vanizem® (Grains of Paradise Extract for Stress + Mood + Sleep — PLT Health)
Sleep quality enhancement (LSEQ)
50-150 mg/day in the only human trial, each dose taken for 3 days; the 50 mg dose already…
Watch
Limited
Bifidobacterium adolescentis
Longer measured sleep, mostly light sleep, with strain SBT2786
PRL2019: 20 billion CFU once daily for 12 weeks in a pediatric IBS trial; other strains…
Recommended Sleep Health Products
Heads up: NutraSmarts may earn a commission from purchases made through these links, at no extra cost to you. We curate these picks based on the same evidence we cite throughout the page. Full disclosure.
Real products featuring the best-evidenced sleep health ingredients ranked above — chosen for clinically-studied forms and doses, third-party testing, and value. Match the supplement to your specific need.
Best for sleep onset & jet lag (low-dose)
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Pure Encapsulations Melatonin 0.5 mg
Melatonin — 0.5 mg low-dose capsule
Most melatonin products are dosed far higher than needed (3 to 10 mg), which can leave people groggy the next morning. Research suggests lower doses (0.3 to 1 mg) work as well or better for falling asleep and for shifting body-clock timing. The 0.5 mg dose sits in that range. Pure Encapsulations is hypoallergenic with no unnecessary ingredients.
Best for restless, wired-but-tired nights
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Nutricost Glycine Powder
L-Glycine powder — pure, unflavored
Small trials report that 3 g taken about an hour before bed shortens the time it takes to fall asleep and improves how rested people feel, though those studies are few and small. Glycine acts as an inhibitory neurotransmitter and lowers core body temperature, a normal cue for sleep. Powder lets you measure the 3 g used in the trials.
Best for cortisol-driven sleep disruption
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Thorne Ashwagandha (Shoden®)
Shoden® extract — 120 mg, root + leaf
When sleep problems come from chronic stress or 'tired but wired' patterns, the underlying issue is often dysregulated cortisol rhythm — too much in the evening when it should be low. Shoden® ashwagandha (35% withanolide glycosides) is the most concentrated extract for HPA-axis modulation and cortisol reduction. Effects build over 4-8 weeks of daily use — best for ongoing nighttime cortisol issues, not acute sleeplessness.
Best studied botanical for tension at bedtime
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Nature's Way CalmAid (Silexan®)
Silexan® lavender oil — 80 mg clinical dose
Silexan® is a standardised lavender oil preparation and one of the better-studied sedating botanicals, with double-blind trials on restlessness and on sleep disturbed by tension. 80 mg per softgel matches the dose used in those trials, and it is not habit-forming. Most useful when racing thoughts and tension are what keep you awake.
All Sleep Health Ingredients (56)
Strong
Melatonin
Time to fall asleep and total sleep
Sleep onset: 0.3–1 mg, 30–60 min before bed. Harder cases: up to 4 mg, 3 hours pre-be
Strong
Ashwagandha
Improved Sleep
KSM-66® root extract: 300-600 mg/day (most stress/sleep trials). Shoden®: 120-240 mg/
Moderate
L-Tryptophan
Less time awake after sleep onset at about 1 g a day or more
Research doses range from about 500 to 5,000 mg/day; sleep trials used 1,000 mg or more at bedtime. The 3–6 g/day mood doses are supervised research doses, not general-use recommendations.
Strong
Saffron Extract (Crocus sativus)
Better sleep quality in adults with poor sleep
Depression (most-studied): 30 mg/day standardized stigma extract × 6-8 weeks. PMS: 15
Moderate
L-Theanine
Sleep quality
200 mg/day in the 4-week healthy-adult trial; 400 mg/day in the stress and sleep trials; 450 to 900 mg/day in the anxiety trial, which was negative. No cited trial combined l-theanine with caffeine.
Limited
Zenroot® (Low-Dose Bioavailable Ashwagandha Root Extract — OmniActive)
Modestly better sleep, at doses higher than this one
125 mg/day is the manufacturer's dose; cited studies used plain ashwagandha at higher doses, commonly 500 to 600 mg a day.
Moderate
KSM-66®
Sleep Quality
600 mg/day of root extract, usually 300 mg twice daily, in most trials; a 250 mg/day arm was also tested, and 675 mg/day in the oligospermia trial.
Moderate
L-Ornithine
Sleep quality improvement
2–6 g/day; fatigue reduction: 2 g before exercise; sleep: 400 mg before bedtime; live
Moderate
Levagen+® (PEA — Palmitoylethanolamide — Gencor)
Faster sleep onset
Standard dose: 300-600 mg/day Levagen+® — substantially lower than typical PEA protoc
Moderate
Sensoril® (Ashwagandha Extract — Kerry/Natreon)
Sleep quality scores in stressed adults
125-500 mg/day Sensoril (research-validated; stress applications often 250 mg/day)
Moderate
Shoden® (35% Withanolide Glycoside Ashwagandha — Arjuna Natural)
Sleep quality
60 mg/day (low dose, clinically effective) to 120 mg/day (full dose); dramatically lo
Limited
Lactium® (Alpha-Casozepine Milk Peptide)
Chronic insomnia improvement
STANDARD: 150-300 mg Lactium®/day (AM/PM split or evening for sleep). 4-WK INSOMNIA R
Moderate
Lavender (Lavandula angustifolia)
Sleep improves, but as a knock-on effect of reduced anxiety
80 mg once a day of oral Silexan® for 6 to 10 weeks (a 160 mg/day arm in one trial); do not swallow ordinary lavender essential oil.
Moderate
Lemon Balm (Melissa officinalis)
Sleep Quality and Onset
300-600 mg/day standardized extract; tea 1.5-4.5 g dried herb per cup; tincture 2-3 m
Moderate
Passionflower (Passiflora incarnata)
Sleep Quality and Onset
300-500 mg/day standardized extract; tea 1-2 g dried herb per cup; tincture 1-4 mL th
Moderate
SiMag® (Sucrosomial® Magnesium)
Sleep and bone support
Delivering about 200 to 375 mg of elemental magnesium per day.
Moderate
Zembrin® (Sceletium tortuosum)
Sleep quality improvement
8–25 mg/day Zembrin®; anxiety/mood: 8–25 mg/day; cognitive studies use 25 mg/day; eff
Moderate
ZMA® (Zinc Magnesium Aspartate — Lonza)
Sleep Quality in Athletes
30 mg zinc + 450 mg magnesium + 10.5 mg B6 (per ZMA standard formulation)
Limited
Cannabinol (CBN)
Fewer night awakenings in adults with poor sleep
20 mg nightly for 7 nights; 25, 50 or 100 mg daily for 4 weeks; 15 mg with 15 mg CBD
Limited
Alpha-Lactalbumin
Evening use and sleep onset
EVENING: 20 g 60-90 min pre-bed. DAYTIME: 20 g stress-vulnerable. EXERCISE: 20-30 g p
Limited
GABA
May Improve Subjective Sleep Quality
ACUTE relaxation/sleep onset: 100-200 mg single dose (PharmaGABA® trials). SLEEP QUAL
Strong
Magnesium
Sleep onset latency in older adults
RDA 310-420 mg/day; trial doses ran from 248 mg/day to magnesium L-threonate 1 to 2 g/day; the tolerable upper limit for supplemental magnesium is 350 mg/day for adults.
Limited
Bifidobacterium adolescentis
Longer measured sleep, mostly light sleep, with strain SBT2786
PRL2019: 20 billion CFU once daily for 12 weeks in a pediatric IBS trial; other strains studied at 1 billion to over 100 billion cells daily.
Limited
Bifidobacterium longum 1714 (Zenflore™ / 1714-Serenitas™)
Sleep quality ratings in adults with poor sleep
Standard dose: 1 billion CFU (1×10⁹) once daily as Zenflore™ or 1714-Serenitas™. Tria
Limited
Lemon Verbena (Aloysia citrodora)
Sleep quality in adults with poor sleep
400 mg/day of standardized leaf extract in the sleep, stress and exercise trials (1
Limited
Magtein® (Magnesium L-Threonate — Threotech)
Sleep: one questionnaire improved, tracked sleep did not
2g/day Magtein® (145 mg elemental magnesium); taken as 1g morning + 1g evening; 6-wee
Limited
Poria cocos / Wolfiporia cocos (Fu Ling / Hoelen / Tuckahoe)
Sleep study in 21 adults, 800 mg nightly, no placebo group
800 mg a night of a 75 percent ethanol extract, the dose in the one sleep study (21 adults, two weeks, no placebo). Traditional use is 9 to 15 g a day of dried sclerotium; the two are not interchangeable.
Limited
Rosemary Extract (Rosmarinus officinalis)
Sleep quality scores in students
500 mg dried rosemary or extract twice daily for 1 to 2 months; an extract giving 5 mg
Limited
Safr'Inside™ (Saffron Extract — Activ'Inside)
Better sleep quality in adults with poor sleep
30 mg/day, as 15 mg twice daily or one 30 mg dose 30 to 60 minutes before bed; 20
Limited
AlphaWave® L-Theanine (NutriScience)
Calm without drowsiness
400 mg per day for 28 days in the single published AlphaWave trial. Labels and the generic L-theanine literature more commonly use 100 to 200 mg per day, below the dose tested here.
Limited
DailyZz™ (Spearmint + Green Tea Sleep Nootropic)
Supports sleep quality
Per Kemin product specification
Limited
GABACare® (Gamma-Aminobutyric Acid)
Easier sleep
Commonly around 100 to 200 mg per day.
Limited
GABARelax® (Gamma-Aminobutyric Acid)
Shorter time to fall asleep
100 mg before bed for one week (Yamatsu); 300 mg once daily for four weeks (Byun); single 100 mg doses in brain-wave studies. No published trial used GABARelax.
Limited
Hops (Humulus lupulus)
Sleep Onset and Quality (with Valerian)
200-500 mg/day standardized extract; commonly combined with 200-600 mg valerian for s
Limited
Magnesium Glycinate (Bisglycinate)
Sleep quality in adults with poor sleep
200–400 mg elemental magnesium/day; for sleep typically 200–300 mg 30–60 min before b
Limited
Ocitum™ (Holy Basil / Tulsi for Stress)
Sleep quality improvement (Athens Insomnia Scale)
Per Kemin product specification (typical adaptogenic dose 300-600 mg/day)
Limited
Phenibut (β-Phenyl-GABA / Noofen)
Sleep / sedative effects
RUSSIAN APPROVED CLINICAL DOSE: 250-500 mg 3×/day (750-1,500 mg/day total). Half-life
Limited
Serezin™
Restorative sleep improvement
300 mg/day; benefits observed within 1 week, peak effects at 4 weeks
Limited
Suntheanine®
Sleep support, indirect evidence
50–200 mg/day; 100–200 mg for relaxation/focus; 50 mg for caffeine stacking
Limited
Tart Cherry Extract
Sleep quality improvement
Recovery: two 8 oz servings of tart cherry juice a day, or 30 mL of concentrate twice a day; sleep: 30 mL of concentrate twice a day. No cited study tested a capsule dose in milligrams.
Limited
Valerian Root
Sleep onset (inconsistent evidence)
300–600 mg extract 30–60 minutes before bedtime
Limited
Vanizem® (Grains of Paradise Stress + Sleep + Mood)
Sleep quality enhancement (LSEQ)
Per Vanizem® clinical dosing specifications from PLT Health Solutions; fast-acting fo
Limited
Chamomile (Matricaria chamomilla)
Self-rated sleep quality, a modest improvement on questionnaires
Up to 1,500 mg a day of standardized extract in divided doses in anxiety trials; 200
Limited
Glycine
Improved Sleep Quality
3–5 g/day for sleep quality; metabolic/detox: 5–10 g/day; collagen support: 3–5 g/day
Preliminary
Magnesium Taurate
Sleep and Anxiety
No dose of magnesium taurate has been tested in a human trial cited here; labels typically supply 100 to 400 mg of elemental magnesium per day.
Moderate
Kiwifruit (Actinidia deliciosa)
Sleep quality when eaten before bed
Whole fruit: 2 green kiwifruit a day (about 200 g flesh) for 4 weeks in bowel trials;
Moderate
PEA — Palmitoylethanolamide
Faster sleep onset in one trial of adults with poor sleep
Standard dose: 300-1,200 mg/day PEA. Most clinical trials use 600 mg twice daily (1,2
Limited
5-HTP (5-hydroxytryptophan)
Sleep Improvement
Depression trials used 50 to 300 mg/day; sleep and body composition 100 mg/day; fibromyalgia and migraine up to 300 mg/day. Never combine with antidepressants or serotonin-raising medicines.
Moderate
Kava (Piper methysticum)
Sleep quality and feeling rested
60–280 mg/day kavalactones; anxiety: 70–280 mg/day; most RCTs use 70–240 mg/day stand
Limited
MonaJuventa™ Nu
Stress and sleep support
100 mg/day for 12 weeks
Limited
Nutricog® (Haritaki + Boswellia Cognitive Performance Complex — PLT Health)
Sleep quality in adults with memory complaints
Daily dosing studied over 120 days.
Limited
Rice Bran Extract (Stabilized Rice Bran and Gamma-Oryzanol)
Sleep onset and sleep efficiency
Stabilized rice bran 20 g/day; gamma-oryzanol 300 to 600 mg/day; rice bran oil about
Limited
Venetron® (Rafuma / Apocynum venetum Mood & Sleep)
Sleep: more deep sleep in one small brain-wave study
50 mg/day Venetron® (Apocynum venetum standardized extract); clinical dose used in pu
Limited
Reishi Mushroom
Stress adaptation and sleep
1.5–9 g/day whole mushroom powder; 1–1.5 g/day standardized extract
Preliminary
Apigenius® (Apigenin)
Relaxation and sleep
Commonly around 50 mg per day, often before bed.
Preliminary
Decursinol-50® (Angelica gigas Extract)
Calm and sleep
Commonly around 100 to 200 mg per day.