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Open research questions in Folate and B Vitamins Research

382 gap statements mined from Folate and B Vitamins Research papers in our 7.9M-paper local library, which holds 1,416 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The combined risk of metformin and PPIs on vitamin B12 deficiency remains limited. There is a lack of evidence regarding the combined risk of these medications on vitamin B12 deficiency, particularly in diabetics with gastroesophageal disorders.

    Vitamin B12 Deficiency Associated with Metformin and Proton Pump Inhibitors and Their Combinations: Results from a Disproportionality and Interaction Analysis · 2025 · DOI

  • The knowledge of the influence of vitamin B12 on aging is still limited. There is a need for further research on the role of vitamin B12 in health and healthy aging.

    Emerging Roles of Vitamin B12 in Aging and Inflammation · 2024 · DOI

  • Although haematological recovery is rapid with treatment, the extent of long-term neurological recovery remains uncertain.

    Neurodevelopmental and vitamin B12 status of patients treated for neurocutaneous infantile vitamin B12 deficiency syndrome: a follow up study · 2026 · DOI

  • Vitamin B 6 is implicated in multiple mental disorders, and accumulating evidence suggests an inverse relationship with depression; however, important aspects of the underlying dose–response patterns and the roles of individual circulating vitamin B 6 metabolites remain incompletely understood.

    Association between serum vitamin B 6 levels and depression in adults: a cross-sectional National Health and Nutrition Examination Survey (NHANES) study · 2026 · DOI

  • The association between vitamin B12 deficiency and colorectal cancer (CRC) risk remains uncertain.

    Association of Low Serum Vitamin B12 Concentration with Colorectal Cancer Risk and All-Cause Mortality: A Global Multi-institutional Retrospective Cohort Study · 2026 · DOI

  • In preconception care, the benefit of assessing paternal tHcy concentrations and promoting multivitamin use warrants further investigation.

    Paternal homocysteine concentrations and prenatal growth outcomes in early and late gestation: the Rotterdam Periconception Cohort (Predict Study) · 2026 · DOI

  • PRS-specific data remain limited, as only one animal-model study has demonstrated that severe HHcy significantly increased flap necrosis rates, microangiography, and inflammatory infiltration, suggesting a direct impairment to tissue viability and repair.

    Homocysteine Levels as a Potential Contributor to Impaired Wound Healing in Plastic and Reconstructive Surgery · 2026 · DOI

  • Hyperhomocysteinaemia has been associated with increased cardiovascular disease (CVD) risk, but the complex interplay between genetic determinants and modifiable lifestyle factors in modulating homocysteine (HC) levels remains incompletely understood.

    Interaction of Genetics and Dietary Patterns Scored by the High Healthy Eating Index in Hyperhomocysteinaemia Influencing Cardiovascular Disease Risk · 2025 · DOI

  • Although folate synthesis has been relatively well characterized, few folate-related genes in maize have been cloned, and the molecular mechanism regulating folate synthesis in maize remains unclear.

    Integrated transcriptomic and proteomic analysis identified key folate biosynthesis gene in waxy maize · 2025 · DOI

  • Work is needed on the methionine content of dietary protein as estimates vary widely.

    Cystathionine β‐Synthase Deficiency in the E‐ HOD Registry—Part II : Dietary and Pharmacological Treatment · 2025 · DOI

  • It remains unclear whether folate plays a crucial role in periodontitis-promoted cognitive impairment (CI) in the elderly population.

    Folate mediates cognitive impairment of aged people with periodontitis · 2025 · DOI

  • Prenatal maternal folate intake is associated with a reduced risk of childhood acute lymphoblastic leukemia (ALL), but how this interacts with children's genetic predisposition to folate deficiency remains unclear.

    The Interrelationship between Preconception Folate Nutritional Intake and Child Genetic Liability in the Risk of Childhood Acute Lymphoblastic Leukemia · 2025 · DOI

  • In those that present with Subacute Combined Degeneration, evaluation for parkinsonism is warranted.

    Cogwheel Rigidity in Subacute Combined Degeneration Unresponsive to Vitamin B12 Therapy · 2024 · DOI

  • Only limited data are available on associations of one-carbon metabolism-related vitamin intake during youth and young adulthood with breast density, a strong risk factor for breast cancer.

    The Associations between Intakes of One-Carbon Metabolism–Related Vitamins and Breast Density among Young Women · 2024 · DOI

  • Given its association with neurocognitive outcomes, we suggest Art3 warrants further study in the context of lifecourse brain health.

    Influence of maternal folate depletion on Art3 DNA methylation in the murine adult brain; potential consequences for brain and neurocognitive health · 2024 · DOI

  • Regarding intervention, the lack of data on vitamin B supplementation was also reported under limitations of the study.

    Discussing “Associations of Folate/Folic Acid Supplementation Alone and in Combination With Other B Vitamins on Dementia Risk and Brain Structure” · 2024 · DOI

  • There is a lack of a single, universally accepted cutoff for defining deficiency.

    Effect of Cobalamin Levels in Patients with T2DM Undergoing Metformin Therapy · 2026 · DOI

  • The exact mechanism of how one-carbon metabolism alterations affect oncogenesis is still unknown. The relationship between one-carbon metabolism and chemotherapy resistance is not fully understood.

    AI-driven modeling of one-carbon metabolism perturbations: Predicting oncologic outcomes through B-Vitamin biomarker integration · 2026 · DOI

  • Despite this critical role, and the negative impact previously noted of B12 deficiency in relation to mitochondrial health, the effects of B12 on skeletal muscle remain underexplored and, to our knowledge, have not been mechanistically evaluated.

    Vitamin B12 improves skeletal muscle mitochondrial biology in aged mice · 2026 · DOI

  • Despite widespread recognition of this risk, clinical monitoring remains suboptimal.

    The silent side effect of metformin: understanding Vitamin B12 deficiency in Type 2 Diabetes · 2026 · DOI

  • Neurocutaneous infantile vitamin B12 deficiency syndrome (NIB) or Infantile tremor syndrome (ITS) is a common yet under-recognised cause of potentially preventable neurodevelopmental impairment in infants.

    Neurodevelopmental and vitamin B12 status of patients treated for neurocutaneous infantile vitamin B12 deficiency syndrome: a follow up study · 2026 · DOI

  • Yet the relationship between folate and premenstrual symptoms remains inconclusive.

    Folate intake, MTHFR genotype and premenstrual symptoms · 2025 · DOI

  • Conventional standard addition requires a separate calibration curve for each specimen, - Individual standard addition impractical for many clinical applications due to increased sample-volume requirements and analytical workload, - Limited to 64 clinical serum…

    Evaluation and correction of charcoal-stripped serum matrix bias in stable-isotope-dilution LC–MS/MS quantification of endogenous serum folates · 2026 · DOI

  • Further evaluation of the pooled-serum standard addition approach in larger clinical studies, - Investigation of the applicability of this approach to other endogenous metabolites, - Development of more efficient and cost-effective methods for matrix effect…

    Evaluation and correction of charcoal-stripped serum matrix bias in stable-isotope-dilution LC–MS/MS quantification of endogenous serum folates · 2026 · DOI

  • The FAERS database is subject to inherent limitations of spontaneous reporting systems - Potential under-reporting, reporting bias, and the lack of a true denominator population - The study is limited by the quality of the data in the FAERS…

    Vitamin B12 Deficiency Associated with Metformin and Proton Pump Inhibitors and Their Combinations: Results from a Disproportionality and Interaction Analysis · 2025 · DOI

Most-cited papers in Folate and B Vitamins Research

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Open questions raised by papers listed on this page include: (1) There is a lack of a single, universally accepted cutoff for defining deficiency (“Effect of Cobalamin Levels in Patients with T2DM Undergoing Metformin Therapy”, 2026); (2) The exact mechanism of how one-carbon metabolism alterations affect oncogenesis is still unknown (“AI-driven modeling of one-carbon metabolism perturbations: Predicting oncologic…”, 2026); (3) The combined risk of metformin and PPIs on vitamin B12 deficiency remains limited (“Vitamin B12 Deficiency Associated with Metformin and Proton Pump Inhibitors and…”, 2025); (4) Although folate synthesis has been relatively well characterized, few folate-related genes in maize have been cloned, and the molecular mechanism regulating folate synthesis in maize remains unclear (“Integrated transcriptomic and proteomic analysis identified key folate…”, 2025); (5) Work is needed on the methionine content of dietary protein as estimates vary widely (“Cystathionine β‐Synthase Deficiency in the E‐ HOD Registry—Part II : Dietary…”, 2025). 382 gap statements have been mined from Folate and B Vitamins Research papers in our 7.9M-paper local library, which holds 1,416 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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