Research
Hormonal
Vitamin D signaling suppresses proinflammatory T helper 1 (Th1) and Th17 cells while inducing immunotolerogenic T-regulatory (Treg) responses, thereby modulating adaptive immunity and reducing inflammation.
If you have an autoimmune condition or chronic inflammation, maintaining adequate Vitamin D levels may help regulate your immune system by reducing harmful inflammation and promoting tolerance. However, do not expect it to cure these conditions, as clinical trials show only modest effects.
GoodSupportsHIGH confidence
Local synthesis of 1,25D by macrophages and dendritic cells also appears to play a pivotal role in mediating T-cell responses to vitamin D, leading to suppression of inflammatory T helper (Th)1 and Th17 cells, and concomitant induction of immunotolerogenic T-regulatory responses.
Why this rating
Supported by multiple studies cited in the review, though clinical trial results are described as 'modest'.
Source
Vitamin D and Immune Regulation: Antibacterial, Antiviral, Anti‐Inflammatory
Emma L. Bishop et al. · JBMR Plus · 2020
DOI 10.1002/jbm4.10405
narrative_reviewCited 376×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →