Resumen de Investigación
Analyzed using Evidence Intelligence™

Cholecalciferol may reduce depression in type 2 diabetes patients

Última actualización 5 de julio de 2026

Key finding

The mean decrease (delta) in the BDI-II score for the cholecalciferol group was -10.053.

This study investigated the effects of cholecalciferol on depression in patients with type 2 diabetes, finding significant improvements in depression scores compared to placebo.

Quick read

Study at a glance

The essential study design details in one scan.

EvidenceScore™

Moderate

Study type

RCTs

Follow-up

Medium-Term (3–12 mo)

Risk of bias

Some Concerns

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Plain-language summary

What this paper says

A plain-language read of the study’s main message and where it applies.

Study focus

This study investigated the effects of cholecalciferol on depression in patients with type 2 diabetes, finding significant improvements in depression scores compared to placebo.

Clinical relevance

This study highlights the potential role of cholecalciferol in managing depression among patients with type 2 diabetes, a population often affected by both conditions. Improved mental health can enhance overall well-being and may lead to better diabetes management outcomes, making it a significant area for further research and clinical application.

Keep in mind

The study's sample size and demographic diversity may limit generalizability. The effects of long-term cholecalciferol use were not assessed. Potential confounding factors were not fully controlled.

Published in

Referencia de la Revista

Publication details and source links for this paper.

Rudi P, Siti S, Martina WN, et al. The effects of cholecalciferol on depression in patients with type 2 diabetes mellitus: a randomized controlled trial. Narra J. 2024;4(3):e1342. doi:10.52225/narra.v4i3.1342

Efectos Principales

The cholecalciferol group showed a significant reduction in Beck Depression Inventory-II scores by -10.05 (p < 0.001).

C-peptide levels increased significantly in the cholecalciferol group by 61.61 pg/mL (p = 0.006).

No significant differences were observed in serotonin and neurotrophin-3 levels between groups.

Evidence network

How this study fits

Understand where this research contributes within the broader evidence network.

Evidence Context

This study contributes evidence to Cholecalciferol and C-peptide, Depression score, Neurotrophin-3, and 1 more.

This study contributes evidence to

Primary intervention

Cholecalciferol

Primary outcomes

  • C-peptide
  • Depression score
  • Neurotrophin-3

Primary intervention

Evidence relationships

Intervention and outcome relationships this study adds to the evidence network.

4
Evidence pairs
4
Relationships
0
Evidence topics
contributes_evidence

Editorial context

Why this study matters

See why this paper is useful beyond its individual results.

Evidence network role

This section describes how the study fits into the current evidence network. It does not determine whether an intervention works on its own.

Moderate contributionModerate confidenceNetwork score: 50

0

Related topics

4

Evidence pairs

0

Related studies

Why it is useful

  • Contributes to 4 evidence relationships
  • Includes primary outcome data
  • Linked to 0 direct semantic evidence topics

Core evidence

Study findings

The primary outcomes reported in this study.

C-peptide

Cholecalciferol → C-peptide

Cholecalciferol → C-peptide

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
100
Very Positive
ConsistencyScore™
unclear
Not enough independent studies
Estudios de apoyo: Basado en 1 estudio
Add to Evidence Tracker

Depression score

Cholecalciferol → Depression score

Cholecalciferol → Depression score

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
100
Very Positive
ConsistencyScore™
unclear
Not enough independent studies
Estudios de apoyo: Basado en 1 estudio
Add to Evidence Tracker

Neurotrophin-3

Cholecalciferol → Neurotrophin-3

Cholecalciferol → Neurotrophin-3

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Estudios de apoyo: Basado en 1 estudio
Add to Evidence Tracker

Serotonin

Cholecalciferol → Serotonin

Cholecalciferol → Serotonin

Evidence Intelligence™
EvidenceScore™
Emerging
Score 59 · Based on 1 study
ImpactScore™
50
Neutral
ConsistencyScore™
unclear
Not enough independent studies
Estudios de apoyo: Basado en 1 estudio
Add to Evidence Tracker

Evidence Library

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evidence suggest

La Evidencia Sugiere

  • Cholecalciferol reduced depression scores significantly (p < 0.001).
  • C-peptide levels increased in the cholecalciferol group (p = 0.006).
  • No significant changes in serotonin and neurotrophin-3 levels.
who this applies

A quién se aplica

  • Adults diagnosed with type 2 diabetes mellitus.
  • Patients experiencing symptoms of depression.
keep in mind

Tener en Cuenta

  • Results may not apply to populations outside the study's demographic.
  • The study did not evaluate the long-term effects of cholecalciferol.
  • Further research is needed to explore the mechanisms behind these findings.
between the lines

Entre Líneas

  • The study's sample size and demographic diversity may limit generalizability.
  • The effects of long-term cholecalciferol use were not assessed.
  • Potential confounding factors were not fully controlled.

Evidence Library

Build your evidence library

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Connected Evidence

Explore related studies, evidence collections, and research questions.

Relationships organized using the Dediabetes Evidence Intelligence™ framework.

This study contributes to evidence on Cholecalciferol and C-peptide, Cholecalciferol and Mental Health.

Relaciones de evidencia relacionadas

Explore in Evidence Explorer

This study contributes to the evidence on the following intervention-outcome relationships.

Questions answered by this study

Generated from the study's connected evidence using Evidence Intelligence™.

Does Cholecalciferol improve c-peptide?

Emerging Evidence

Cholecalciferol appears to improve C-peptide.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    C-peptide

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Jul 2026

Does Cholecalciferol improve depression score?

Emerging Evidence

Cholecalciferol appears to improve Depression score.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    Depression score

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Jul 2026

Does Cholecalciferol improve neurotrophin-3?

Emerging Evidence

Current evidence does not show a clear benefit of Cholecalciferol for Neurotrophin-3.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    Neurotrophin-3

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Jul 2026

Does Cholecalciferol improve serotonin?

Emerging Evidence

Current evidence does not show a clear benefit of Cholecalciferol for Serotonin.

ConsistencyScore™: Consistency cannot yet be determined from the available evidence.

Ranked evidence signals

  1. 1

    Serotonin

    EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study

Why this answer: This answer is based on a single supporting study.

Limitations

  • Only one supporting study is available.
  • Consistency cannot yet be determined.
  • Population details are unavailable.
1 supporting studyUpdated: Jul 2026
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