Nutrients commonly taken for immune support. This is a cost-per-dose value comparison, not medical advice — see each nutrient page for NIH-sourced detail. Best value right now: Zinc from $0.02/serving.
Prices checked Jul 11, 2026
The nutrients people commonly associate with immune support, each shown at its cheapest current cost per dose (per gram for powders). Ranked lowest cost first; no paid placement.
| # | Nutrient | Cheapest pick | Dose basis | Price | Cost / dose | Refs |
|---|---|---|---|---|---|---|
| 1 | Zinc | 21st Century, Zinc Citrate, 50 Mg, 360 Tabs | per serving | $6.75 | $0.02/serving | facts · NIH |
| 2 | Vitamin D3 | Vitamin D3 5000 IU with Coconut MCT Oil - High… | per serving | $8.63 | $0.02/serving | facts · NIH |
| 3 | Vitamin C | Windmill, Vitamin C, 250mg, 100 Tabs | per serving | $5.13 | $0.05/serving | facts · NIH |
| 4 | Quercetin | Migcopat NMN Supplement 1000mg – 5-in-1 NAD… | per serving | $12.36 | $0.10/serving | facts · NIH |
Ranked by real cost per dose (per gram for powders), not sticker price. We make no health claims — see each linked nutrient page for NIH-sourced facts, or read our methodology.
This page gathers the nutrients people commonly associate with immune support and ranks each one by cost per dose— the product’s current price divided by its servings per container, then normalized to one daily dose (or per gram for powders so a 20 g and a 25 g serving compare fairly). The table shows the single cheapest pick we currently track for each nutrient, sorted lowest cost first. Nothing here is paid placement, and a nutrient with no active deals simply drops off the list.
If you are assembling a stack for immune support, cost per dose is the figure that tells you what each option actually costs to take day after day — a smaller bottle with a lower sticker price can cost more per serving than a larger one. Use it to compare like-for-like and avoid overpaying; it is a price-comparison signal, not a measure of quality or suitability.
Detailed nutrient facts — intake ranges, food sources, upper limits and safety — live on each linked nutrient hub, sourced from the NIH Office of Dietary Supplements. For the full ranking rules see our methodology and editorial standards.
Commonly: Vitamin C, Zinc, Vitamin D3, Quercetin. We make no medical claims — each is ranked here by real cost per dose, with NIH-sourced facts on its nutrient page. Not medical advice.
By cost per dose, 21st Century, Zinc Citrate, 50 Mg, 360 Tabs (Zinc) at $0.02/serving is the cheapest per-dose option among the immune support nutrients we track as of July 2026.
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.