Evidence map›Paper›PMID 41156551›Full record

SynthesisNutrients2025

Folate Supplementation for Peripheral Neuropathy: A Systematic Review.

Ana Carolina Alves Maues, Mònica Gemma Moren Abat, María Benlloch, Gonzalo Mariscal

Abstract readSystematic Review
In one paragraph

Synthesis in Nutrients, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Review
  2. Article
  3. Review
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Ana Carolina Alves MauesOPKO Health Spain S.L.U., Palol de Revardit, 17843 Girona, Spain.
Mònica Gemma Moren AbatOPKO Health Spain S.L.U., Palol de Revardit, 17843 Girona, Spain.
María BenllochDepartment of Basic Biomedical Sciences, Catholic University of Valencia San Vicente Mártir, 46001 Valencia, Spain.ORCID 0000-0002-3342-6732
Gonzalo MariscalInstitute for Research on Musculoskeletal Disorders, Catholic University of Valencia San Vicente Mártir, 46001 Valencia, Spain.ORCID 0000-0002-5166-198X

Funding

OPKO Health Spain S.L.U. ACAM and MGMA are employees of OPKO Health Spain S.L.U., and GM serves as a consultant for OPKO Health Spain S.L.U.
6 · The paper itself

Abstract

backgroundPeripheral neuropathy (PN) represents a considerable and rapidly growing global health burden, with diabetic PN alone impacting nearly half of diabetic patients. Evidence from experimental studies highlighted that folate supplementation may protect nerve health by supporting myelin maintenance, minimizing oxidative stress, and enhancing neurotrophic factors. Nevertheless, its clinical efficacy and safety in managing PN have not yet been established. This study seeks to evaluate the role of folate in managing PN regarding the efficacy and safety endpoints.

methodsUp to July 2025, a comprehensive search of four electronic databases, encompassing PubMed, Scopus, Web of Science, and Cochrane Library, was executed, collecting studies evaluating the folate in managing PN. Outcomes included pain scores, symptom improvement endpoints, Neuropathy Total Symptom Score (NTSS) scores, epidermal nerve fiber density (ENFD), biomarkers, and side effects.

resultsThe narrative synthesis demonstrated consistent symptomatic benefits with pain reductions reaching 3 points, with symptom resolution rates of 87.5% and NTSS-6 score enhancements varying from 0.9 to 1.5 points. Notably, objective structural improvements in ENFD were observed, with increases reaching 97%. Furthermore, folate showed an excellent safety and tolerability profile with only one adverse event reported among 1367 individuals. Folate significantly decreased homocysteine and high-sensitivity C-reactive protein (hs-CRP) levels.

conclusionsFolate showed promising symptomatic benefits for peripheral neuropathy, with objective structural improvements (ENFD) and favourable biomarker changes (homocysteine, hs-CRP reduction), with an excellent safety profile.

Indexed as

Dietary SupplementsFolic AcidPeripheral Nervous System DiseasesBiomarkersDiabetic NeuropathiesFemaleHomocysteineHumansMaleTreatment OutcomeBiomarkersFolic AcidHomocysteinediabetic peripheral neuropathyfolatefolic acidperipheral neuropathy

Identifiers

PMID41156551
PMCPMC12566604

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.