The short answer
A combined B-vitamin trial found some longer-term benefits alongside antidepressant treatment, but it does not show that B12 alone improves citalopram absorption or that everyone needs supplements.
What this answer covers
Combined B12, folic acid and B6 intervention; not isolated B12 or routine dietary intake.
- Supplement or preparation
- Vitamin B12
- Medication ingredient
- citalopram
Three vitamins were tested together
The study enrolled 153 adults aged 50 or older and started citalopram with B12, folic acid and B6 or placebo. It cannot identify an isolated B12 effect.
Early and later results differed
There was no early remission advantage. Some later remission and relapse measures favored vitamins, while overall depression-score differences were not significant.
Longer follow-up had a medication limitation
After week 12, general practitioners could change the antidepressant. The later findings cannot all be attributed to unchanged citalopram treatment.
Use the result for a clinical discussion
The study did not measure citalopram absorption. Ask whether your nutritional status and depression care justify testing or supplementation; do not copy a trial regimen or adjust citalopram yourself.
Evidence and practical considerations
Absorption & effectiveness
Conditional evidence for a combined vitamin augmentation strategy, not B12 alone or altered absorption.
- Exact scope
- Combined B12, folic acid and B6 intervention; not isolated B12 or routine dietary intake. with Exact oral citalopram hydrobromide film-coated tablets. RxNorm IN2556 / PIN221078 hydrobromide tablets. Racemic citalopram is distinct from escitalopram.
- Medication form and route
- oral
- Timing or duration
- Source-specific single-dose, repeated-dose and observational exposures distinguished.
What remains uncertain
- One trial, combined nutrients, no early efficacy advantage and possible antidepressant changes after week 12.
Factors that may matter: preparation and plant part; clinical indication; dose; other medicines; baseline alertness.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: People prescribed oral citalopram.
Label names tryptophan and St John’s wort in serotonin warnings; dose-dependent QT and electrolyte precautions are distinct from sedation and nutritional augmentation.
How this applies: RxNorm IN2556 / PIN221078 hydrobromide tablets. Racemic citalopram is distinct from escitalopram.
No universal supplement interval, event rate or preparation equivalence established.
Source 2: original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: 153 adults aged 50 or older with major depression.
No early remission advantage or significant overall depression-score difference; later remission and relapse outcomes favored the vitamin combination.
How this applies: Only the named drug, preparation, route and measured endpoints apply.
Not B12 alone. After week 12 general practitioners could change antidepressants. No citalopram absorption endpoint. Original abstract citalopram unit typo corrected using original methods.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Current exact available claims adjudicated using original captures and explicit identity and comparator limits. | |
| Research summary published |
Article revision: 39f390c9bdcd41b1
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.