body system
Immune function
Immune function depends on a network of cells, tissues, signals, and nutrients.
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.
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.
Zinc supports normal function of Immune function
Zinc-dependent proteins contribute to normal immune-cell and barrier function.
Selenium supports proteins involved in Immune function
Selenoproteins participate in redox and immune processes.
References
Source-checked local draft.
Human editorial review pending.
- NIH Office of Dietary SupplementsVitamin D: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- NIH Office of Dietary SupplementsVitamin A and Carotenoids: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- NIH Office of Dietary SupplementsZinc: Fact Sheet for Health ProfessionalsChecked 2026-09-05
- NIH Office of Dietary SupplementsSelenium: Fact Sheet for Health ProfessionalsChecked 2026-09-05