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    Ingredient guide · Ingredient reference

    Can a vitamin deficiency cause heart palpitations?

    B12 deficiency can be associated with palpitations, but a racing or pounding heartbeat has many causes. New or concerning symptoms need assessment rather than a vitamin trial.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    A deficiency is one possible context

    ODS includes palpitations among possible effects of B12 deficiency, which can also cause anemia. That does not establish B12 as the cause of a particular episode. A normal-feeling or abnormal rhythm can both be described as palpitations. [1][2]

    Other contributors require different responses

    MedlinePlus lists stress, stimulants, some medicines, thyroid disease and abnormal heart rhythms among possibilities. Electrolyte abnormalities can also matter. Magnesium and potassium are minerals, and taking them without knowing the cause is not a substitute for rhythm assessment. [2]

    Know the urgency before considering supplements

    Get emergency help for palpitations with chest pain, breathlessness, fainting or marked lightheadedness. Arrange review for new or different palpitations. Imagine someone assumes a pounding heartbeat is low B12: the priority is assessing the episode, with nutrient testing only as appropriate. [2]

    Hypothetical example — use symptom context rather than guessing a missing vitamin
    SituationUseful distinction
    Confirmed B12 deficiencyA treatable nutritional problem
    New palpitationsNeeds clinical assessment
    Chest pain or faintingEmergency help
    Can a vitamin deficiency cause heart palpitations? — original article outline diagram
    Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

    Sources for this article

    1. Vitamin B12 - Health Professional Fact Sheet
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.
    2. Heart palpitations: MedlinePlus Medical Encyclopedia
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.