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Goal

Everyday immune support

Daily basics — vitamin D status, zinc adequacy, and routine supplemental support.

Ranked ingredients

3 ingredients

1
Vitamin D3 (Cholecalciferol)StrongMultiple human RCTs converging on the same effect, ideally including meta-analyses.See methodology
A fat-soluble vitamin with widespread low intake in northern climates.
2
Zinc BisglycinateStrongMultiple human RCTs converging on the same effect, ideally including meta-analyses.See methodology
An essential mineral for immune cell function, modest dose recommended.
3
Vitamin C (Ascorbate)StrongMultiple human RCTs converging on the same effect, ideally including meta-analyses.See methodology
An essential vitamin with the strongest evidence at modest daily doses.

Vitamin D3 (Cholecalciferol)

Nature Made Vitamin D3 2000 mg

Nature Made

Per serving: 2000 mg
Studied midpointStudied range midpoint is used. Pricing assumes label-recommended servings.See methodology: 2500 mg · 2/day

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Now Foods Vitamin D3 2000 mg

Now Foods

Per serving: 2000 mg
Studied midpointStudied range midpoint is used. Pricing assumes label-recommended servings.See methodology: 2500 mg · 2/day

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Thorne Vitamin D3 1000 mg

Thorne

Per serving: 1000 mg
Studied midpointStudied range midpoint is used. Pricing assumes label-recommended servings.See methodology: 2500 mg · 3/day