Component

Neurologic recovery following B12 replacement

Independent substance, clinical endpoint or measured readout; study context is retained with each finding.

3 recorded relationships. Experimental role, claim status and evidence remain attached to each record.

Read recorded mechanisms Open recursive mind map

How nutrients influence it

Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.

How nutrients reach it in more than one step

Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.

Tracing routes…

What it does

Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.

Recorded relationships

What acts on it

  1. In 121 adequately followed episodes, all responded and 57 (47.1%) recovered completely; post-treatment involvement was related to pretreatment severity and symptom duration.

    Vitamin B12 (cobalamins) → Neurologic recovery following B12 replacement source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    nutrient_deficiency Imported condition classification; unverified.
    experimental_model
    Retrospective clinical series: 153 neurologic B12-deficiency episodes in 143 patients at two New York hospitals over 17 years.
    exposure
    Cobalamin treatment and clinical follow-up; 121 episodes had adequate neurologic response assessment.
    limitations
    Related investigators and hospital settings may overlap earlier clinical series. No guaranteed reversibility or universal time limit.
    nutrient_topic
    Vitamin B12 research collection; topical membership is not evidence of a direct dietary effect. · Vitamin B12 (cobalamins)
    organism
    Homo sapiens
    plain_language
    Treatment response and full recovery are different outcomes.
    primary_references
    [b12-healton1991] Neurologic aspects of cobalamin deficiency (1991). https://pubmed.ncbi.nlm.nih.gov/1648656/ DOI: 10.1097/00005792-199107000-00001
    tissue_or_cell_type
    Human blood or whole-person endpoints
    trigger_kind
    nutrient_deficiency Imported condition classification; unverified.

    Vitamin B12: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1450–1460

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Retrospective clinical series: 153 neurologic B12-deficiency episodes in 143 patients at two New York hospitals over 17 years. · source_derived_draft · unverified_draft

    ### b12-neuro-recovery-incomplete In 121 adequately followed episodes, all responded and 57 (47.1%) recovered completely; post-treatment involvement was related to pretreatment severity and symptom duration. Condition category: nutrient_deficiency nutrient_topic: Vitamin B12 research collection; topical membership is not evidence of a direct dietary effect. plain_language: Treatment response and full recovery are different outcomes. organism: Homo sapiens tissue_or_cell_type: Human blood or whole-person endpoints experimental_model: Retrospective clinical series: 153 neurologic B12-deficiency episodes in 143 patients at two New York hospitals over 17 years. limitations: Related investigators and hospital settings may overlap earlier clinical series. No guaranteed reversibility or universal time limit. exposure: Cobalamin treatment and clinical follow-up; 121 episodes had adequate neurologic response assessment. [b12-healton1991] Neurologic aspects of cobalamin deficiency (1991). https://pubmed.ncbi.nlm.nih.gov/1648656/ DOI: 10.1097/00005792-199107000-00001
    Complete structured claim and evidence

  2. Among the 40 patients lacking at least one blood-count abnormality, one died in the first week; all 39 remaining patients showed neuropsychiatric improvement following cobalamin therapy.

    Vitamin B12 (cobalamins) → Neurologic recovery following B12 replacement source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    nutrient_deficiency Imported condition classification; unverified.
    experimental_model
    Clinical series: 141 consecutive patients with neuropsychiatric abnormalities attributed to cobalamin deficiency; 40 lacked anemia or macrocytosis.
    exposure
    Clinical evaluation and cobalamin replacement; observational response series.
    limitations
    Uncontrolled selected series; response does not mean complete recovery or prove that every neuropsychiatric symptom is caused by B12.
    nutrient_topic
    Vitamin B12 research collection; topical membership is not evidence of a direct dietary effect. · Vitamin B12 (cobalamins)
    organism
    Homo sapiens
    plain_language
    A blood count could look unremarkable while a B12-responsive nervous-system problem was present.
    primary_references
    [b12-lindenbaum1988] Neuropsychiatric disorders caused by cobalamin deficiency in the absence of anemia or macrocytosis (1988). https://pubmed.ncbi.nlm.nih.gov/3374544/ DOI: 10.1056/nejm198806303182604
    tissue_or_cell_type
    Human blood or whole-person endpoints
    trigger_kind
    nutrient_deficiency Imported condition classification; unverified.

    Vitamin B12: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1438–1448

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Clinical series: 141 consecutive patients with neuropsychiatric abnormalities attributed to cobalamin deficiency; 40 lacked anemia or macrocytosis. · source_derived_draft · unverified_draft

    ### b12-neuro-treatment-response Among the 40 patients lacking at least one blood-count abnormality, one died in the first week; all 39 remaining patients showed neuropsychiatric improvement following cobalamin therapy. Condition category: nutrient_deficiency nutrient_topic: Vitamin B12 research collection; topical membership is not evidence of a direct dietary effect. plain_language: A blood count could look unremarkable while a B12-responsive nervous-system problem was present. organism: Homo sapiens tissue_or_cell_type: Human blood or whole-person endpoints experimental_model: Clinical series: 141 consecutive patients with neuropsychiatric abnormalities attributed to cobalamin deficiency; 40 lacked anemia or macrocytosis. limitations: Uncontrolled selected series; response does not mean complete recovery or prove that every neuropsychiatric symptom is caused by B12. exposure: Clinical evaluation and cobalamin replacement; observational response series. [b12-lindenbaum1988] Neuropsychiatric disorders caused by cobalamin deficiency in the absence of anemia or macrocytosis (1988). https://pubmed.ncbi.nlm.nih.gov/3374544/ DOI: 10.1056/nejm198806303182604
    Complete structured claim and evidence

  3. The oral and IM groups showed prompt, indistinguishable improvement in hematologic and neurologic abnormalities.

    Cyanocobalamin → Neurologic recovery following B12 replacement source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    nutrient_deficiency Imported condition classification; unverified.
    experimental_model
    Randomized oral-versus-intramuscular study: 38 allocated; five subsequently identified as folate deficient excluded, leaving 18 oral and 15 injection participants.
    exposure
    Cyanocobalamin 2 mg orally each day for 120 days versus 1 mg IM on days 1, 3, 7, 10, 14, 21, 30, 60 and 90. Unequal cumulative exposures.
    limitations
    Small evaluable groups do not establish equivalence for every severe presentation or rare processing disorder.
    nutrient_topic
    Vitamin B12 research collection; topical membership is not evidence of a direct dietary effect. · Vitamin B12 (cobalamins)
    organism
    Homo sapiens
    plain_language
    Absorption through the usual food route was not required for every effective replacement regimen in this trial.
    primary_references
    [b12-kuzminski1998] Effective treatment of cobalamin deficiency with oral cobalamin (1998). https://pubmed.ncbi.nlm.nih.gov/9694707/ DOI: 10.1182/blood.v92.4.1191
    tissue_or_cell_type
    Human blood or whole-person endpoints
    trigger_kind
    nutrient_deficiency Imported condition classification; unverified.

    Vitamin B12: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1685–1695

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Randomized oral-versus-intramuscular study: 38 allocated; five subsequently identified as folate deficient excluded, leaving 18 oral and 15 injection participants. · source_derived_draft · unverified_draft

    ### b12-oral-im-clinical-response The oral and IM groups showed prompt, indistinguishable improvement in hematologic and neurologic abnormalities. Condition category: nutrient_deficiency nutrient_topic: Vitamin B12 research collection; topical membership is not evidence of a direct dietary effect. plain_language: Absorption through the usual food route was not required for every effective replacement regimen in this trial. organism: Homo sapiens tissue_or_cell_type: Human blood or whole-person endpoints experimental_model: Randomized oral-versus-intramuscular study: 38 allocated; five subsequently identified as folate deficient excluded, leaving 18 oral and 15 injection participants. limitations: Small evaluable groups do not establish equivalence for every severe presentation or rare processing disorder. exposure: Cyanocobalamin 2 mg orally each day for 120 days versus 1 mg IM on days 1, 3, 7, 10, 14, 21, 30, 60 and 90. Unequal cumulative exposures. [b12-kuzminski1998] Effective treatment of cobalamin deficiency with oral cobalamin (1998). https://pubmed.ncbi.nlm.nih.gov/9694707/ DOI: 10.1182/blood.v92.4.1191
    Complete structured claim and evidence

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

    This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

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