# Evaluating Treatment Outcomes of Vitamin B12 and Folic Acid Supplementation in Obsessive-Compulsive Disorder Patients With Deficiencies: A Comparative Analysis

**Authors:** Sultana Algin, Tanbir Ahmed, Md Munaim Reza, Asha Akter, Nusrat Jahan Tanzilla, Md. Ahsanul Haq, Rahnuma Ahmad, Miral Mehta, Mainul Haque

PMC · DOI: 10.7759/cureus.82420 · 2025-04-17

## TL;DR

This study found that adding vitamin B12 and folic acid to standard OCD treatment improved symptoms and biochemical markers more than standard treatment alone.

## Contribution

The study demonstrates that vitamin B12 and folic acid supplementation enhances OCD treatment outcomes when combined with SSRIs.

## Key findings

- Supplementation improved vitamin B12, folic acid, and reduced homocysteine levels more in the supplemented group.
- Both groups showed reduced OCD symptoms, but improvements were statistically significant in the supplemented group.
- No significant differences in insight levels were observed between the two groups.

## Abstract

Introduction

Obsessive-compulsive disorder (OCD) imposes a considerable impact on day-to-day functioning. Many people experience insufficient symptom relief even after taking the optimum dose of OCD medications. Reduced levels of folic acid and vitamin B₁₂, along with elevated homocysteine (HCY), have been suggested as possible factors in the persistence of obsessive-compulsive (OC) symptoms. This study investigated how supplementation of vitamin B₁₂, folic acid, and selective serotonin reuptake inhibitors (SSRIs) affects OC symptoms and related biochemical markers.

Methods

A comparative study enrolled 72 OCD patients. For eight weeks, the conventional treatment group received SSRIs or other anti-obsessive medication. In contrast, the nutrient-supplemented group received supplements of vitamin B₁₂, folic acid, and SSRIs. Micronutrients HCY, folic acid, and vitamin B₁₂ were measured at baseline and after eight weeks. Besides, the Yale-Brown Obsessive Compulsive Scale (Y-BOCS) was applied to assess the severity of OCD symptoms at the baseline, four-week, and eight-week visits.

Results

Group A (conventional treatment with nutrient supplement) showed significant improvements in vitamin B₁₂, blood folic acid, and reductions in HCY levels compared to Group B (conventional treatment). However, no substantial differences in insight levels were observed between the groups. Both groups exhibited decreased Y-BOCS scores, indicating a reduction in OCD symptoms; however, the improvements in Group A (conventional treatment + nutrient supplement) were statistically significant.

Conclusions

When taken with SSRIs, vitamin B₁₂and folic acid supplements seem to improve OCD patients’ clinical results. These results imply that this supplementation could be a useful therapeutic adjunct.

## Linked entities

- **Chemicals:** vitamin B12 (PubChem CID 73415824), folic acid (PubChem CID 135398658), homocysteine (PubChem CID 778)
- **Diseases:** obsessive-compulsive disorder (MONDO:0008114)

## Full-text entities

- **Diseases:** Deficiencies (MESH:D007153), OCD (MESH:D009771)
- **Chemicals:** Folic Acid (MESH:D005492), vitamin B12and (-), Vitamin B12 (MESH:D014805), HCY (MESH:D006710)
- **Species:** Homo sapiens (human, species) [taxon 9606]

## Figures

5 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12004335/full.md

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Source: https://tomesphere.com/paper/PMC12004335