Verified Supplement Data Primary-sourced

Cheapest Vitamin D3 per 1,000 IU 2026: Cost Ranked

By Erin Rose · Published · Prices verified 2026-09-18 · Methodology

Not medical advice. Prices are current Amazon prices for the exact container and move week to week; doses are each label’s.

Quick answer

Vitamin D3 costs between $0.008 and $0.13 per 1,000 IU across the 12 products we track, a 15.3× spread for the same cholecalciferol. The sticker price is meaningless because bottles run from 120 to 600 servings; only the price per dose compares.

Cheapest: NatureWise Vitamin D3 5000 IU in Olive Oil, $0.008 per 1,000 IU ($3.04 a year). Cheapest certified: NatureWise Vitamin D3 5000 IU in Olive Oil, $0.008 per 1,000 IU, in the NSF/ANSI 173 registry. See the table →

Cheapest per 1,000 IU$0.008NatureWise Vitamin D3 5000 IU in Olive Oil
Cheapest certified$0.008NatureWise Vitamin D3 5000 IU in Olive Oil · NSF/ANSI 173
Spread, same molecule15.3×$0.008 to $0.13
On this page
  1. Ranked by cost per 1,000 IU
  2. Why per dose
  3. Product by product
  4. Why this dose
  5. Which to buy
  6. FAQ

Every vitamin D3 we track, ranked by cost per 1,000 IU

Original research12 vitamin D3 products priced on the same day (2026-09-18) from the current Amazon price of the exact container and the dose on each Supplement Facts panel; 5 of the 12 are in an independent certification registry per our registry check of 12 products against 3,053 NSF, 159 USP and 2,105 Informed Sport listings.

Method: every vitamin D3 product in our catalog with a live Amazon offer (12 of them). Price is the current Amazon price of the exact container (by ASIN), verified 2026-09-18; dose is the Supplement Facts serving; cost per 1,000 IU = price ÷ (servings × IU per serving) × 1,000. The verification rung comes from our registry snapshots (NSF/ANSI 173, USP Verified, Informed Sport; 2026-08-25) and brand-site certificate checks (2026-09-19). Products with no buyable Amazon offer are left out rather than priced from memory.

Vitamin D3 products we track, cheapest per 1,000 IU first, with the verification rung from our third-party-tested check.
ProductCost per 1,000 IUActive per servingServing on labelServingsPriceQuality signalBuy
NatureWise Vitamin D3 5000 IU in Olive Oil $0.008 5,000 IU D3 1 mini softgel 360 $14.99 Rung 1: NSF/ANSI 173 listing Check price
NOW Foods Vitamin D3 5000 IU $0.010 5,000 IU D3 1 softgel 240 $11.97 Rung 4: unverified Check price
Sports Research Vitamin D3 5000 IU with Coconut Oil $0.011 5,000 IU D3 1 mini softgel 360 $18.95 Rung 4: unverified Check price
Nutricost Vitamin D3 5,000 IU $0.011 5,000 IU D3 1 softgel 240 $12.95 Rung 4: unverified Check price
Nature's Bounty Vitamin D3 5000 IU $0.012 5,000 IU D3 1 softgel 240 $14.31 Rung 1: USP Verified listing Check price
Nature Made Vitamin D3 5000 IU $0.022 5,000 IU D3 1 softgel 180 $19.57 Rung 1: USP Verified listing Check price
Nutricost Vitamin D3 5000 IU + K2 100 mcg MK-7with K2 $0.025 5,000 IU D3 1 softgel 120 $14.95 Rung 4: unverified Check price
Nature Made Vitamin D3 2000 IU $0.025 2,000 IU D3 1 softgel 250 $12.49 Rung 1: USP Verified listing Check price
Thorne Vitamin D3 + K2 Liquidwith K2 $0.057 1,000 IU D3 2 drops (~1000 IU D3 + K2) 600 $34.00 Rung 1: NSF/ANSI 173 listing Check price
Sports Research Vitamin D3 + K2with K2 $0.064 5,000 IU D3 1 veggie softgel 120 $38.40 Rung 4: unverified Check price
Garden of Life Organics Vegan D3 Sprayliquid / spray $0.124 1,000 IU D3 1 spray 125 $15.44 Rung 4: unverified Check price
Nordic Naturals Vitamin D3 1000 IU $0.127 1,000 IU D3 1 mini softgel 120 $15.26 Rung 2: lot-specific public COA Check price

Cost per 1,000 IU = current Amazon price for the exact container (verified 2026-09-18) divided by total active content in the container, times 1,000. The spread from NatureWise Vitamin D3 5000 IU in Olive Oil to Nordic Naturals Vitamin D3 1000 IU is 15.3× for the same active. Prices move week to week.

Why the number is per 1,000 IU, and what the price actually buys

Vitamin D3 is sold at 1,000, 2,000 and 5,000 IU per softgel in bottles of 90 to 360, so the sticker price says nothing about what a unit of vitamin D costs. Every product here is priced per 1,000 IU of cholecalciferol from its Supplement Facts panel, which puts a 90-count 5,000 IU bottle and a 360-count 1,000 IU bottle on the same line. The catch, and the reason the quality column sits next to the price, is that potency in this category is measured to vary widely from the label (see below), and a cheap unit of vitamin D you cannot verify is a cheap unit of an unknown dose.

Across the 12 products the spread is 15.3× per 1,000 IU. 5 of them are in an independent certification registry (the quality column, from our third-party-tested check); the rest are label claims. Over a year at 2,000 IU a day the gap between the cheapest and most expensive is $86.75.

Cost per 1,000 IU, product by product

Each line is the arithmetic behind the table: container price divided by servings, then scaled per 1,000 IU, then multiplied out to a year at one dose a day. Cheapest first.

  • NatureWise Vitamin D3 5000 IU in Olive Oil: $14.99 for 360 servings of 5,000 IU D3 is $0.042 a serving and $0.008 per 1,000 IU, or $3.04 a year. Rung 1: NSF/ANSI 173 listing.
  • NOW Foods Vitamin D3 5000 IU: $11.97 for 240 servings of 5,000 IU D3 is $0.050 a serving and $0.010 per 1,000 IU, or $3.64 a year. Rung 4: unverified.
  • Sports Research Vitamin D3 5000 IU with Coconut Oil: $18.95 for 360 servings of 5,000 IU D3 is $0.05 a serving and $0.011 per 1,000 IU, or $3.84 a year. Rung 4: unverified.
  • Nutricost Vitamin D3 5,000 IU: $12.95 for 240 servings of 5,000 IU D3 is $0.05 a serving and $0.011 per 1,000 IU, or $3.94 a year. Rung 4: unverified.
  • Nature's Bounty Vitamin D3 5000 IU: $14.31 for 240 servings of 5,000 IU D3 is $0.06 a serving and $0.012 per 1,000 IU, or $4.35 a year. Rung 1: USP Verified listing.
  • Nature Made Vitamin D3 5000 IU: $19.57 for 180 servings of 5,000 IU D3 is $0.11 a serving and $0.022 per 1,000 IU, or $7.94 a year. Rung 1: USP Verified listing.
  • Nutricost Vitamin D3 5000 IU + K2 100 mcg MK-7: $14.95 for 120 servings of 5,000 IU D3 is $0.12 a serving and $0.025 per 1,000 IU, or $9.09 a year. Rung 4: unverified. Note: with K2.
  • Nature Made Vitamin D3 2000 IU: $12.49 for 250 servings of 2,000 IU D3 is $0.050 a serving and $0.025 per 1,000 IU, or $9.12 a year. Rung 1: USP Verified listing.
  • Thorne Vitamin D3 + K2 Liquid: $34.00 for 600 servings of 1,000 IU D3 is $0.06 a serving and $0.06 per 1,000 IU, or $20.68 a year. Rung 1: NSF/ANSI 173 listing. Note: with K2.
  • Sports Research Vitamin D3 + K2: $38.40 for 120 servings of 5,000 IU D3 is $0.32 a serving and $0.06 per 1,000 IU, or $23.36 a year. Rung 4: unverified. Note: with K2.
  • Garden of Life Organics Vegan D3 Spray: $15.44 for 125 servings of 1,000 IU D3 is $0.12 a serving and $0.12 per 1,000 IU, or $45.08 a year. Rung 4: unverified. Note: liquid / spray.
  • Nordic Naturals Vitamin D3 1000 IU: $15.26 for 120 servings of 1,000 IU D3 is $0.13 a serving and $0.13 per 1,000 IU, or $46.42 a year. Rung 2: lot-specific public COA.

Why 1,000 IU is the unit, and what dose the guidelines set

One thousand IU is a unit for comparison, not a recommendation; the price scales with whatever dose you actually take. The Institute of Medicine’s 2011 reference intakes set the RDA at 600 IU a day to age 70 and 800 IU after, corresponding to a serum 25-hydroxyvitamin D of 20 ng/mL, with a tolerable upper intake of 4,000 IU; the committee found no consistent extra benefit at higher intakes and U-shaped risk for some outcomes (Ross 2011, PMID 21118827). The Endocrine Society’s guideline recommends testing people at risk of deficiency rather than screening everyone, and treating deficiency with either D2 or D3 (Holick 2011, PMID 21646368); in head-to-head trials D3 raised blood levels more effectively than D2, which is why every product on this page is D3 (Tripkovic 2012, PMID 22552031). So: at the 600 to 800 IU maintenance range the yearly cost of even the priciest product here is small; the 5,000 IU softgels are the cheapest per unit but are a correction dose for a measured low level, not a default.

Reading the quality column

The quality column is the same four-rung ladder as the third-party-tested page, compressed to a phrase. Rung 1 means the exact product appears in an independent certification registry in our snapshots; rung 2 means the brand publishes a lot-specific certificate of analysis you can match to the number on your container; rung 3 means a representative or undated report; rung 4 means a claim on the label or website with nothing behind it that we could open, or a brand site that blocked our check. The rung does not change the cost per dose, but it changes what the cost per dose is buying: at rung 4 you are paying for the molecule and the brand’s word; at rung 1 you are paying for the molecule and someone else’s test of it.

How to run the same calculation on any bottle

  1. Take the price and the servings count from the container: $14.99 and 360 servings for NatureWise Vitamin D3 5000 IU in Olive Oil (a dose above the 4,000 IU tolerable upper limit, meant for correcting a measured low level rather than daily use).
  2. Divide price by servings: $14.99 ÷ 360 = $0.042 a serving.
  3. Scale the serving to the dose you actually take: the label serving is 5,000 IU D3 (a dose above the 4,000 IU tolerable upper limit, meant for correcting a measured low level rather than daily use), so per 1,000 IU the cost is $0.042 × 1000 ÷ 5000 = $0.008.
  4. Multiply by 365 for the yearly figure: $3.04. Compare that number, never the sticker price.

What moves this ranking is bottle size and dose per softgel, not brand. A 360-count bottle of 1,000 IU and a 90-count of 5,000 IU can be near-identical per 1,000 IU while looking nothing alike on the shelf. Products that add vitamin K2 price the K2, not the D; liquids and sprays cost more per unit for the format. Subscribe & Save is not included. Every figure is computed from the catalog at build time, none is typed.

Which vitamin D3 to buy

Product links go to Amazon and we may earn a commission if you buy. It never changes which product we pick or what we say about it. How we choose.

Cheapest per dose
NatureWise Vitamin D3 5000 IU in Olive Oil $0.008 per 1,000 IU
360 servings at $14.99. Rung 1: NSF/ANSI 173 listing. The floor for the category; every other bottle is paying for something beyond the molecule.

Check price →

Frequently asked questions

What is the cheapest vitamin D3 per dose?

NatureWise Vitamin D3 5000 IU in Olive Oil at $0.008 per 1,000 IU at current Amazon prices ($14.99 for 360 servings), or about $3.04 a year. The most expensive bottle we track, Nordic Naturals Vitamin D3 1000 IU, is $0.13 per dose, 15.3 times as much, for the same cholecalciferol.

What is the cheapest vitamin D3 that is actually third-party certified?

NatureWise Vitamin D3 5000 IU in Olive Oil at $0.008 per 1,000 IU, listed as "Naturewise Vitamin D3 125 mcg (5000 IU) Softgels" in the NSF/ANSI 173 registry. It is also the cheapest vitamin D3 of any kind we track, so certification costs nothing here. The full verification ladder is on the third-party-tested page.

Why price vitamin D3 per 1,000 IU instead of per serving?

Because the dose per softgel varies five-fold across products and the bottle counts vary four-fold, so neither the price nor the price per softgel compares. Price divided by the total IU in the bottle, times 1,000, is the only fair number; multiply by 2 for a 2,000 IU day or by 5 for a 5,000 IU correction course.

Is expensive vitamin D3 better?

Not at the molecule: cholecalciferol is the same whoever makes the softgel. What the price buys, when it buys anything, is a USP Verified or NSF listing that confirms the softgel holds its labelled IU, a vitamin K2 pairing, or a liquid or spray form. Given the measured potency range in this category, the registry listing is the one premium with a concrete meaning.

How much does a year of vitamin D3 cost?

At one 5 g dose a day: $3.04 for NatureWise Vitamin D3 5000 IU in Olive Oil, $3.04 for the cheapest certified product, and $46.42 for Nordic Naturals Vitamin D3 1000 IU. Loading for a week adds about 15 doses.

Related guides

Sources

  1. Ross AC, et al. “The 2011 report on dietary reference intakes for calcium and vitamin D from the Institute of Medicine: what clinicians need to know.” J Clin Endocrinol Metab. 2011. PMID: 21118827
  2. Holick MF, et al. “Evaluation, treatment, and prevention of vitamin D deficiency: an Endocrine Society clinical practice guideline.” J Clin Endocrinol Metab. 2011. PMID: 21646368
  3. Tripkovic L, et al. “Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis.” Am J Clin Nutr. 2012. PMID: 22552031
  4. Product labels and current Amazon prices for each container, verified 2026-09-18; verification rungs from our registry and brand-site check (see the third-party-tested page).