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: Vitamin D3 from $0.02/serving.
Prices checked Oct 9, 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 | Vitamin D3 | Micro Ingredients Vitamin D3 5,000 IU | per serving | $9.99 | $0.02/serving | facts · NIH |
| 2 | Zinc | 21st Century Zinc Citrate 50mg Tablets | per serving | $8.49 | $0.02/serving | facts · NIH |
| 3 | Vitamin C | Bronson Vitamin C 500 MG Supports a Healthy… | per serving | $9.99 | $0.04/serving | facts · NIH |
| 4 | Quercetin | DEAL SUPPLEMENT Quercetin 1,000mg Per Serving | per serving | $21.99 | $0.07/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, Micro Ingredients Vitamin D3 5,000 IU (Vitamin D3) at $0.02/serving is the cheapest per-dose option among the immune support nutrients we track as of October 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.