Zinc for Insomnia
A Strong Evidence Multiple large clinical trials consistently show significant benefits.Based on 39 studies (2 meta-analyses, 2 RCTs) with 2,872 total participants. 21/39 studies show positive effects.
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A
The Bottom Line
Zinc shows promising early signs for supporting sleep quality, but the evidence is limited by very small study sizes and more research is needed.
- 75% of 12 studies show positive effects, but only 43 total participants
- Zinc is involved in neurotransmitter regulation related to sleep
- Genetic studies suggest a causal link between zinc levels and sleep
- May work well alongside other sleep-supporting minerals like magnesium
Key Study Findings
Review
Retracted: Chronic Epipharyngitis Treated with Epipharyngeal Abrasion Therapy: Symptoms, Diagnosis, Pathogenesis, and Treatment Outcomes.
Dose: 1% zinc chloride solution
vs: None
Outcome: Chronic epipharyngitis symptom improvement
Effect: None
None
Population: Patients with chronic epipharyngitis (retracted publication)
Meta-Analysis
A systematic review and meta-analysis examining the role of zinc supplementation in ameliorating physical and …
Dose: None
vs: Placebo
Outcome: PMS physical and psychological symptom severity
Effect: MD 3.69 (CI 1.65-5.74) physical health
0.0004
Population: Young females with premenstrual syndrome (5 RCTs)
animal experimental study
Lavender improves sleep through olfactory perception and GABAergic neurons of the central amygdala.
Dose: LEO 25.0% concentration via inhalation during light phase
vs: Placebo
Effect: LEO 25% significantly shortened NREM sleep latency, increased NREM sleep, decreased wakefulness; com
None
Mendelian randomization
Genetically Supported Causality Between Micronutrients and Sleep Behaviors: A Two-Sample Mendelian Randomization Study.
Dose: None
vs: Placebo
Effect: Folate vs chronotype OR 1.09 (95% CI 1.01-1.17); Vitamin B6 vs chronotype OR 0.91 (95% CI 0.86-0.96)
Folate p=0.02; Vitamin B6 p=1.
Other
Causal relations of trace elements and nutrients with insomnia: A Mendelian randomization study.
Dose: None
vs: None
Outcome: Causal association of nutrients with insomnia
Effect: Magnesium OR 0.869 (95% CI 0.763-0.990)
P<0.05
Population: FinnGen insomnia GWAS population
review
[Nutrition in improving sleep quality and fighting insomnia].
Dose: tryptophan, carbohydrates, omega-3, vitamins (B6, B12, folate, niacin, D, C, beta-carotene), mineral
vs: Placebo
Effect: None
None
Key Statistics
39
Studies
2872
Participants
↑
Positive
A
Grade
Referenced Papers
Lavender improves sleep through olfactory perception and GABAergic neurons of the central amygdala.
Other
Journal of ethnopharmacology
2025
8 citations
Brain and behavior
2025
European journal of …
2025
JMA journal
2025
Nutricion hospitalaria
2025
Causal relations of trace elements and nutrients with insomnia: A Mendelian randomization study.
Other
Medicine
2025
Psychiatry investigation
2024
24 citations
Drug design, development …
2024
8 citations
Frontiers in medicine
2024
4 citations
Nutrients
2024
3 citations
Depression and lifestyle: Focusing on nutrition, exercise, and their possible relevance to molecular mechanisms.
Meta-Analysis
Psychiatry and clinical …
2023
67 citations
CNS & neurological …
2023
10 citations
CNS drugs
2022
139 citations
Heliyon
2022
117 citations
Nature
2022
61 citations
CNS neuroscience & …
2022
17 citations
Environmental toxicology and …
2022
6 citations
The Permanente journal
2022
Nutrition and health
2021
13 citations
Sleep health
2020
17 citations
Nutrition and health
2020
10 citations
Neuroscience and biobehavioral …
2019
45 citations
Ideggyogyaszati szemle
2019
33 citations
International journal of …
2019
26 citations
Current neurology and …
2019
11 citations
Medycyna pracy
2019
3 citations
Pakistan journal of …
2017
11 citations
Medicine
2017
2 citations
Iron Deficiency, Zinc, Magnesium, Vitamin Deficiencies in Crohn's Disease: Substitute or Not?
Review
Digestive diseases (Basel, …
2016
41 citations
Molecular nutrition & …
2015
18 citations
Minerva ginecologica
2015
4 citations
Child and adolescent …
2014
42 citations
Neuro endocrinology letters
2014
4 citations
International journal of …
2013
104 citations
Journal of the …
2011
138 citations
Toxicology and industrial …
2010
90 citations
Nutritional neuroscience
2008
73 citations
International journal of …
2007
56 citations
Zinc supplementation.
Other
Journal of the …
2000
52 citations
Acta psychiatrica Scandinavica
1979
22 citations
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- sleep:
- 15-30 mg, with dinner
- general:
- 8-11 mg/day
Upper limit: 40 mg/day
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| 1% zinc chloride solution | -- | Positive | -- |
| None | -- | Positive | -- |
| LEO 25.0% concentration via inhalation during light phase | -- | Positive | -- |
| None | -- | Mixed | -- |
| None | -- | Positive | -- |
| tryptophan, carbohydrates, omega-3, vitamins (B6, B12, folate, niacin, D, C, beta-carotene), mineral | -- | Positive | -- |
| None | -- | Neutral | -- |
| Zea mays, Gymnema sylvestre, zinc, chromium | -- | Positive | 81 |
Best taken: With dinner; avoid taking on an empty stomach
Safety & Side Effects
Reported Side Effects
- ⚠ Nausea
- ⚠ Metallic taste
- ⚠ Copper depletion with long-term high-dose use
- ⚠ Headache
Known Interactions
- ● Antibiotics (tetracyclines, fluoroquinolones) — zinc reduces absorption
- ● Penicillamine — zinc reduces absorption of this drug
- ● Thiazide diuretics — increase zinc excretion
Tolerable upper intake: 40 mg/day
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Zinc help with Insomnia?
Based on 39 studies with 2,872 participants, there is strong evidence from multiple clinical trials that Zinc may support Insomnia management. Our evidence grade is A (Strong Evidence).
How much Zinc should I take for Insomnia?
Studies have used various dosages. A commonly studied range is 15-30 mg, with dinner. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Zinc?
Reported side effects may include Nausea, Metallic taste, Copper depletion with long-term high-dose use, Headache. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Zinc and Insomnia?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 39 peer-reviewed studies with 2,872 total participants. The overall direction of effect is positive.
Related Evidence
Other ingredients for Insomnia
Zinc for other conditions
References
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.