Zinc for Insomnia

Q: 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).

Q: 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.

Q: 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.

Q: 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.

Based on 39 studies (2 meta-analyses, 2 RCTs) with 2,872 total participants. 21/39 studies show positive effects.

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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

Studies

2872

Participants

↑

Positive

Grade

Referenced Papers

Lavender improves sleep through olfactory perception and GABAergic neurons of the central amygdala. Other

Journal of ethnopharmacology 2025 8 citations

Genetically Supported Causality Between Micronutrients and Sleep Behaviors: A Two-Sample Mendelian Randomization Study. Other

Brain and behavior 2025

A systematic review and meta-analysis examining the role of zinc supplementation in ameliorating physical and psychological manifestations of premenstrual syndrome … Meta-Analysis

European journal of … 2025

Retracted: Chronic Epipharyngitis Treated with Epipharyngeal Abrasion Therapy: Symptoms, Diagnosis, Pathogenesis, and Treatment Outcomes. Review

JMA journal 2025

[Nutrition in improving sleep quality and fighting insomnia]. Review

Nutricion hospitalaria 2025

Causal relations of trace elements and nutrients with insomnia: A Mendelian randomization study. Other

Medicine 2025

Herbal and Natural Supplements for Improving Sleep: A Literature Review. Other

Psychiatry investigation 2024 24 citations

Jujuboside A Regulates Calcium Homeostasis and Structural Plasticity to Alleviate Depression-Like Behavior via Shh Signaling in Immature Neurons. Other

Drug design, development … 2024 8 citations

Commonly encountered symptoms and their management in patients with cirrhosis. Review

Frontiers in medicine 2024 4 citations

Efficacy and Tolerability of a Food Supplement Based on Zea mays L., Gymnema sylvestre (Retz.) R.br.ex Sm, Zinc and Chromium … RCT

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

A Causal-Pathway Phenotype of Chronic Fatigue Syndrome due to Hemodialysis in Patients with End-Stage Renal Disease. Other

CNS & neurological … 2023 10 citations

Psychobehavioural and Cognitive Adverse Events of Anti-Seizure Medications for the Treatment of Developmental and Epileptic Encephalopathies. Review

CNS drugs 2022 139 citations

A review on bioactive phytochemicals and ethnopharmacological potential of purslane (Portulaca oleracea L.). Review

Heliyon 2022 117 citations

Mechanisms of inhibition and activation of extrasynaptic αβ GABAA receptors. Other

Nature 2022 61 citations

Metal ions in cerebrospinal fluid: Associations with anxiety, depression, and insomnia among cigarette smokers. Other

CNS neuroscience & … 2022 17 citations

Risk evaluation of occupational exposure of southern Brazilian flower farmers to pesticides potentially leading to cholinesterase inhibition and metals exposure. Observational

Environmental toxicology and … 2022 6 citations

Decreasing the Symptoms of Essential Tremor With Medical Painting Therapy. Case Report

The Permanente journal 2022

Impact of a Nordic diet on psychological function in young students. Other

Nutrition and health 2021 13 citations

Associations between nutritional adequacy and insomnia symptoms in Japanese men and women aged 18-69 years: a cross-sectional study. Other

Sleep health 2020 17 citations

A study of the association between cognitive abilities and dietary intake in young women. Other

Nutrition and health 2020 10 citations

Supraphysiologic-dose anabolic-androgenic steroid use: A risk factor for dementia? Review

Neuroscience and biobehavioral … 2019 45 citations

[Tracing trace elements in mental functions]. Review

Ideggyogyaszati szemle 2019 33 citations

Mutations in Prion Protein Gene: Pathogenic Mechanisms in C-Terminal vs. N-Terminal Domain, a Review. Review

International journal of … 2019 26 citations

Sleep Disorders in Wilson's Disease. Review

Current neurology and … 2019 11 citations

[Insomnia in shift workers of a zinc smelter]. Other

Medycyna pracy 2019 3 citations

Serum levels of leptin, zinc and tryptophan in obese subjects with sleep deficits. Other

Pakistan journal of … 2017 11 citations

Copper-associated hepatitis in a patient with chronic myeloid leukemia following hematopoietic stem cell transplantation: A case report. Case Report

Medicine 2017 2 citations

Iron Deficiency, Zinc, Magnesium, Vitamin Deficiencies in Crohn's Disease: Substitute or Not? Review

Digestive diseases (Basel, … 2016 41 citations

Zinc-containing yeast extract promotes nonrapid eye movement sleep in mice. Other

Molecular nutrition & … 2015 18 citations

[Evaluation of the efficacy of a new nutraceutical product in the treatment of postmenopausal symptoms]. Other

Minerva ginecologica 2015 4 citations

Nutritional supplements for the treatment of ADHD. Review

Child and adolescent … 2014 42 citations

Zinc in drug-naïve patients with short-illness-duration first episode major depressive disorder: impact on psychopathological features. Other

Neuro endocrinology letters 2014 4 citations

Probing Lingzhi or Reishi medicinal mushroom Ganoderma lucidum (higher Basidiomycetes): a bitter mushroom with amazing health benefits. Review

International journal of … 2013 104 citations

The effect of melatonin, magnesium, and zinc on primary insomnia in long-term care facility residents in Italy: a double-blind, placebo-controlled … RCT

Journal of the … 2011 138 citations

Study on clinical and biochemical toxicity biomarkers in a zinc-lead mine workers. Other

Toxicology and industrial … 2010 90 citations

Suppressive effect of Yokukansan on excessive release of glutamate and aspartate in the hippocampus of zinc-deficient rats. Other

Nutritional neuroscience 2008 73 citations

Future therapeutic treatment of COPD: struggle between oxidants and cytokines. Review

International journal of … 2007 56 citations

Zinc supplementation. Other

Journal of the … 2000 52 citations

Depression or asthenia related to metabolic disturbances in obese patients after intestinal bypass surgery. Other

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

Melatonin A Valerian Root A CBD A Omega-3 Fatty Acids A Tryptophan A Vitamin D A

Zinc for other conditions

Sleep Onset Difficulty A

Quick Verdict

Based on 39 studies (2 meta-analyses, 2 RCTs) with 2,872 total participants. 21/39 studies show positive effects.

Evidence Strength92%

High confidence

Study Breakdown

RCT (2)Meta (2)Other (35)

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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.