A form of vitamin D can calm down overactive immune cells in the body by turning down a specific molecule that causes inflammation, which helps the body produce a protein that reduces swelling and irritation.
See the scientific wording
1,25-Dihydroxyvitamin D suppresses the expression of microRNA-155 in mouse and human macrophages exposed to bacterial lipopolysaccharide, leading to reduced inflammation through de-repression of the anti-inflammatory protein SOCS1.
Correlational — new studies may shift this
ObservationalOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
Case-Control StudyAnimal2013
Vitamin D helps calm down overactive immune cells by turning down a molecule called miR-155, which normally blocks a natural brake on inflammation called SOCS1. When vitamin D reduces miR-155, SOCS1 can work better to stop excessive inflammation.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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A form of vitamin D can calm down overactive immune cells in the body by turning down a specific molecule that causes inflammation, which helps the body produce a protein that reduces swelling and irritation.
Evidence from Studies
Supporting (1)
Community contributions welcome
1,25-Dihydroxyvitamin D Promotes Negative Feedback Regulation of TLR Signaling via Targeting MicroRNA-155–SOCS1 in Macrophages
Vitamin D helps calm down overactive immune cells by turning down a molecule called miR-155, which normally blocks a natural brake on inflammation called SOCS1. When vitamin D reduces miR-155, SOCS1 can work better to stop excessive inflammation.
1 study stuck in processing — a maintainer can requeue it.
Contradicting (0)
Community contributions welcome
1 study has been processing far longer than a normal run. The pipeline may be stuck — a maintainer can requeue it, and the results will appear here once it finishes.
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of 1,25-Dihydroxyvitamin D Effects on microRNA-155 and SOCS1 Expression in Macrophages Across Human and Mouse Studies
Systematic review and meta-analysis of all peer-reviewed studies comparing 1,25-dihydroxyvitamin D exposure versus control in human and mouse macrophages exposed to LPS, measuring microRNA-155 expression, SOCS1 levels, and inflammatory markers (e.g., TNF-alpha, IL-6).
Double-Blind RCT of Oral 1,25-Dihydroxyvitamin D vs Placebo on Macrophage microRNA-155 and SOCS1 in Humans with LPS-Induced Inflammation
Randomized, double-blind, placebo-controlled trial in healthy human adults receiving intravenous or oral 1,25-dihydroxyvitamin D versus placebo, followed by LPS challenge; macrophages isolated pre- and post-intervention to measure microRNA-155, SOCS1, and cytokine levels over 24–48 hours.
Prospective Cohort Study of Vitamin D Status and microRNA-155/SOCS1 Expression in Macrophages of Individuals with Chronic Inflammatory Conditions
Prospective cohort following individuals with varying baseline vitamin D levels over 6–12 months, measuring macrophage microRNA-155 and SOCS1 expression during inflammatory episodes (e.g., infections or flare-ups), adjusting for confounders like diet, BMI, and comorbidities.
In Vitro Study of 1,25-Dihydroxyvitamin D on microRNA-155 and SOCS1 in Human and Mouse Macrophage Cell Lines Exposed to LPS
Human and mouse macrophage cell lines treated with graded doses of 1,25-dihydroxyvitamin D (e.g., 1–100 nM) for 6–24 hours, followed by LPS stimulation; microRNA-155 and SOCS1 expression measured via qPCR and Western blot, with controls for vehicle and LPS-only.
Mouse Model Study of 1,25-Dihydroxyvitamin D Administration on Macrophage microRNA-155, SOCS1, and Systemic Inflammation Following LPS Challenge
C57BL/6 mice randomized to receive 1,25-dihydroxyvitamin D (e.g., 0.1 µg/kg) or vehicle daily for 7 days, then challenged with LPS; macrophages isolated from peritoneum or spleen to measure microRNA-155, SOCS1, and serum cytokines over 24–72 hours.