body system
Immune function
Immune function depends on a network of cells, tissues, signals, and nutrients.
Educational draft · Human scientific and editorial review pending. About review status
About Immune function
Vitamin D is involved in immune function. Evidence about supplements and specific infections is a separate question and should not be inferred from that biological role.
Where does vitamin D come from—and where does it go?Related topics
Vitamin D is involved in Immune function
Vitamin D has a recognized role in immune function. This relationship alone does not establish that taking a supplement prevents or treats an infection.
Evidence: Established · Source checked 2026-09-04 · Sources: NIH Office of Dietary Supplements: Vitamin D: Fact Sheet for Health Professionals
Vitamin A supports normal function of Immune function
Vitamin A is involved in normal immune function. This established role does not mean extra vitamin A improves immunity when intake is adequate.
Evidence: Established · Source checked 2026-09-05 · Sources: NIH Office of Dietary Supplements: Vitamin A and Carotenoids: Fact Sheet for Health Professionals
Zinc supports normal function of Immune function
Zinc-dependent proteins contribute to normal immune-cell and barrier function.
Evidence: Established · Source checked 2026-09-05 · Sources: NIH Office of Dietary Supplements: Zinc: Fact Sheet for Health Professionals
Selenium supports proteins involved in Immune function
Selenoproteins participate in redox and immune processes.
Evidence: Established · Source checked 2026-09-05 · Sources: NIH Office of Dietary Supplements: Selenium: Fact Sheet for Health Professionals
References
Source-checked local draft.
Human editorial review pending.
- NIH Office of Dietary Supplements (opens in new tab)Vitamin D: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- NIH Office of Dietary Supplements (opens in new tab)Vitamin A and Carotenoids: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- NIH Office of Dietary Supplements (opens in new tab)Zinc: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- NIH Office of Dietary Supplements (opens in new tab)Selenium: Fact Sheet for Health ProfessionalsChecked 2026-09-05