Homocysteine and cognitive function in depression: a systematic review and meta-analysis - Scorecard - MDSpire

Homocysteine and cognitive function in depression: a systematic review and meta-analysis

  • By

  • Xiaotong Liu

  • Qingsong Liu

  • Jili Xu

  • Jie Wu

  • May 13, 2026

  • 0 min

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Clinical Scorecard: The Relationship Between Homocysteine Levels and Cognitive Function in Depressed Patients: A Systematic Review and Meta-Analysis

At a Glance

CategoryDetail
ConditionDepression with cognitive impairment
Key MechanismsAssociation of elevated homocysteine levels with cognitive deficits through neurotoxic effects and oxidative stress.
Target PopulationPatients with depression
Care SettingClinical and research settings

Key Highlights

  • Significant inverse association between homocysteine levels and cognitive scores (r = −0.41).
  • High homocysteine levels correlate with poorer cognitive performance (SMD = −0.37).
  • Patients with cognitive impairment have higher homocysteine levels than cognitively normal individuals (SMD = 2.44).
  • Further prospective studies are needed to clarify the clinical relevance of homocysteine.
  • Dysregulation of one-carbon metabolism may affect cognitive function in depression.

Guideline-Based Recommendations

Diagnosis

  • Assess homocysteine levels in patients with depression to evaluate cognitive impairment.

Management

  • Consider monitoring homocysteine levels as part of the management plan for depressed patients with cognitive deficits.

Monitoring & Follow-up

  • Regularly evaluate cognitive function in patients with elevated homocysteine levels.

Risks

  • Higher homocysteine levels may increase the risk of cognitive decline and dementia.

Patient & Prescribing Data

Individuals diagnosed with depression experiencing cognitive impairment.

Addressing elevated homocysteine levels may be beneficial in managing cognitive deficits in depression.

Clinical Best Practices

  • Utilize validated instruments for diagnosing depression and assessing cognitive function.
  • Incorporate dietary and lifestyle interventions that may lower homocysteine levels.
  • Encourage further research into the relationship between homocysteine and cognitive function in depression.

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