A form of vitamin D can calm down immune cells when they overreact to bacteria by turning off a key inflammation signal, which helps produce a protein that puts the brakes on the immune response.
See the scientific wording
In mouse and human macrophages, 1,25-dihydroxyvitamin D suppresses the inflammatory response to bacterial lipopolysaccharide by inhibiting NF-κB activation, which reduces transcription of the microRNA-155 gene, thereby increasing levels of the anti-inflammatory protein SOCS1 and enhancing negative feedback regulation of Toll-like receptor signaling.
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 the immune system’s overreaction to bacteria by turning down a gene (miR-155) that blocks a natural brake (SOCS1) on inflammation. This lets the body stop the inflammation faster.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
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Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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A form of vitamin D can calm down immune cells when they overreact to bacteria by turning off a key inflammation signal, which helps produce a protein that puts the brakes on the immune response.
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 the immune system’s overreaction to bacteria by turning down a gene (miR-155) that blocks a natural brake (SOCS1) on inflammation. This lets the body stop the inflammation faster.
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 NF-κB and SOCS1 in Macrophage Inflammation Models
Systematic review and meta-analysis of all published studies in human and mouse macrophages examining 1,25-dihydroxyvitamin D exposure, NF-κB inhibition, miR-155 downregulation, SOCS1 upregulation, and TLR signaling feedback, with standardized outcome measures.
Double-Blind RCT of Oral 1,25-Dihydroxyvitamin D vs Placebo on Macrophage Inflammatory Markers in Humans
Randomized, double-blind, placebo-controlled trial in healthy adult humans receiving oral 1,25-dihydroxyvitamin D (e.g., 5 µg/day) or placebo for 8 weeks, with blood-derived monocyte-derived macrophages analyzed for NF-κB activation, miR-155 expression, SOCS1 protein levels, and TLR response to LPS.
Prospective Cohort of Vitamin D Status and Macrophage miR-155/SOCS1 Expression in Humans
Prospective cohort of 500 adults with baseline serum 25(OH)D and follow-up measurements of monocyte-derived macrophage miR-155, SOCS1, and LPS-induced NF-κB activity over 12 months, adjusting for confounders.
In Vitro Treatment of Human and Mouse Macrophages with 1,25-Dihydroxyvitamin D and Measurement of NF-κB, miR-155, and SOCS1
Primary human and mouse macrophages treated with 1,25-dihydroxyvitamin D (e.g., 10 nM) for 24h, followed by LPS challenge; NF-κB nuclear translocation (Western blot/IF), miR-155 (qPCR), SOCS1 (ELISA/Western), and TLR signaling output (cytokine secretion) measured in triplicate.
Mouse Model of LPS-Induced Inflammation Treated with 1,25-Dihydroxyvitamin D to Assess Macrophage miR-155 and SOCS1 Dynamics
C57BL/6 mice given intraperitoneal 1,25-dihydroxyvitamin D (e.g., 0.5 µg/kg) or vehicle daily for 7 days, then challenged with LPS; peritoneal macrophages isolated and analyzed for NF-κB, miR-155, SOCS1, and cytokine levels at 6h, 24h, and 48h post-LPS.