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    Ingredient guide · Ingredient reference

    Does selenium raise blood pressure? A trial-review signal

    A review of supplementation trials found a small average rise in systolic blood pressure with selenium, with no significant diastolic change. That does not mean every user will have the same response, but it argues against taking selenium simply for blood-pressure protection. Persistent high readings need direct assessment.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    The pooled result was a modest increase

    The 2022 systematic review reported an average systolic increase of about 2 mmHg. Diastolic pressure did not change significantly. Different study populations and regimens limit application to an individual, and the abstract does not establish a safe or harmful threshold for every person. [1]

    Nutritional need does not imply benefit from extra

    Selenium is essential, but NIH describes harms from excessive exposure. Count supplements and concentrated dietary sources together. A blood-pressure concern is not a reason to increase selenium, and a normal requirement is not evidence for high-dose cardiovascular treatment. [2][1]

    Review the reading and the product

    NHS explains that hypertension is diagnosed with appropriate repeated measurements, sometimes home or ambulatory monitoring. Record the dose, other ingredients and symptom timeline. Continue prescribed treatment and discuss persistent elevations instead of assuming the supplement is the only possible cause. [3]

    Make the next step measurable

    Imagine blood pressure rises after adding selenium. Recheck appropriately, bring the label to the clinician and review whether supplementation is needed. A temporal association deserves attention, but cannot alone establish causation or justify changing blood-pressure medicines. [3][1]

    Hypothetical example — review selenium and a pressure change
    FindingInterpretation
    Small average systolic rise in trialsPossible effect, not a universal response
    One high readingRequires context and repeat measurement
    High-dose supplement without indicationReview necessity and exposure
    Prescribed pressure medicineDo not substitute selenium
    Does selenium raise blood pressure? A trial-review signal — 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. The effects of selenium supplementation on blood lipids and blood pressure in adults: A systematic review and dose-response meta-analysis of randomized control trials.
      Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.
    2. Selenium - Health Professional Fact Sheet
      Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.
    3. High blood pressure - NHS
      Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.