Vitamin B6 for Insomnia
BBased on 8 studies (1 meta-analysis) with 40 total participants. 5/8 studies show positive effects.
The Bottom Line
Vitamin B6 may play a role in supporting sleep through its involvement in melatonin production, but the direct evidence for insomnia is limited and preliminary.
- Only 5 studies with 50 total participants — evidence is preliminary
- B6 is involved in producing serotonin and melatonin, both important for sleep
- Genetic studies (Mendelian randomization) suggest a link between B6 and sleep behaviors
- More clinical trials with larger sample sizes are needed
Key Study Findings
Population: FinnGen insomnia GWAS population
Population: Crohn's disease patients (micronutrient deficiency)
Population: Adults with insomnia or sleep disorders
Key Statistics
8
Studies
40
Participants
Positive
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- sleep:
- 25-50 mg with B-complex
- general:
- 1.3-1.7 mg/day
Upper limit: 100 mg/day (neuropathy risk above)
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | -- | Positive | -- |
| tryptophan, carbohydrates, omega-3, vitamins (B6, B12, folate, niacin, D, C, beta-carotene), mineral | -- | Positive | -- |
| None | -- | Mixed | -- |
| not specified per component | 4 weeks | Positive | 40 |
| None | -- | Mixed | -- |
| None | -- | Positive | -- |
| None | -- | Positive | -- |
| 5 mg | -- | Mixed | -- |
Best taken: Morning or with dinner; high doses before bed may increase dream vividness
Safety & Side Effects
Reported Side Effects
- ⚠ Nausea
- ⚠ Peripheral neuropathy at high doses (>100 mg/day)
- ⚠ Vivid dreams
- ⚠ Heartburn
Known Interactions
- ● Levodopa — B6 may reduce effectiveness (without carbidopa)
- ● Phenobarbital and phenytoin — B6 may reduce serum levels
- ● Cycloserine — B6 deficiency may worsen side effects
Tolerable upper intake: 100 mg/day (neuropathy risk above)
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Vitamin B6 help with Insomnia?
How much Vitamin B6 should I take for Insomnia?
Are there side effects of Vitamin B6?
How strong is the evidence for Vitamin B6 and Insomnia?
Related Evidence
Other ingredients for Insomnia
Vitamin B6 for other conditions
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.