Best Vitamin D3
The best vitamin d3 we track, ranked by real cost-per-dose — not paid placements. Across 120 brands, 5 are third-party tested in a public registry.
Updated October 2026prices checked what’s changed
How much does Vitamin D3 cost?
Vitamin D3 costs a median $0.11 per serving — the cheapest of the 296 we can price per dose is $0.02 per serving, or $0.008/day to reach the commonly-studied 2,000 IU dose. Prices checked October 2026.
Best vitamin d3 for a specific goal
Ranked across 297 products · prices checked Oct 10, 2026
How we rank
We rank by cost-per-dose — price ÷ servings, normalized to the daily dose (2,000 IU/day) — so bottle sizes and strengths compare fairly. Prices are scraped at publication and re-checked when the catalog refreshes (see the “Prices checked” stamp above). There is no paid placement and no kickback for ordering. Full methodology · Editorial standards.
When cheapest ≠ best value
The cheapest bottle isn’t automatically the best value: a low-absorption form (magnesium oxide is the classic example) can look cheap per milligram yet deliver less of what you actually absorb. Where forms differ, compare cost per absorbed or elemental unit, not the compound weight on the label. A bigger bottle isn’t automatically cheaper per dose either — this list already ranks by cost per dose, so a larger count only wins if it truly costs less per serving. Compare Vitamin D3 forms.
Our data on this: how much the big bottle saves per serving · the gummy tax · the form premium · the price spread.
Full ranking by cost per dose
Cost-per-serving normalizes price across bottle sizes — a 60-count and a 365-count compare fairly. Top 20 of 297 shown.
- See offer$0.02per serving$0.008 / 2,000 IU
- See offer$0.02per serving$0.02 / 2,000 IU
- See offer$0.02per serving1.1× #1$0.04 / 2,000 IU
- See offer$0.02per serving1.1× #1$0.009 / 2,000 IU
- See offer$0.02per serving1.1× #1$0.009 / 2,000 IU
- See offer$0.02per serving1.1× #1$0.02 / 2,000 IU
- See offer$0.02per serving1.2× #1$0.12 / 2,000 IU
- See offer$0.02per serving1.3× #1$0.12 / 2,000 IU
- See offer$0.03per serving1.3× #1$0.05 / 2,000 IU
- See offer$0.03per serving1.3× #1$0.03 / 2,000 IU
- See offer$0.03per serving1.4× #1$0.01 / 2,000 IU
- See offer$0.03per serving1.4× #1
- See offer$0.03per serving1.4× #1$0.06 / 2,000 IU
- See offer$0.03per serving1.4× #1
- See offer$0.03per serving1.4× #1$0.01 / 2,000 IU
- See offer$0.03per serving1.4× #1$0.06 / 2,000 IU
- See offer$0.03per serving1.4× #1$0.03 / 2,000 IU
- See offer$0.03per serving1.4× #1$0.01 / 2,000 IU
- See offer$0.03per serving1.4× #1
- See offer$0.03per serving1.4× #1$0.03 / 2,000 IU
See also: Vitamin D3 basics · all best-value rankings · vitamin d3 cost-per-dose breakdown
Read: Vitamin D3 guides
Related comparisons, stacks & nutrients
Vitamin D3 brands we compare — which are third-party tested?
5 of the 120 brands ranked above appear in an independent certifier's own public registry. A certification confirms the label matches the contents — it says nothing about how well the supplement works, and an uncertified brand is not automatically worse.
- BulkSupplements.com NSF Sport
- Nature Made USP
- Nordic Naturals NSF Sport
- Sports Research Informed Choice
- Thorne NSF Sport
- 21st Century
- 365 by Whole Foods Market
- Aiwevon
- Amazon Basics
- Amazon Elements
- Andrew Lessman
- Bariatric Fusion
- Basic Brands
- Bayter Nutrition
- berkley jensen
- Bio-Tech Pharmacal
- Bioclinic Naturals
- BioSchwartz
- Black Girl Vitamins
- Bluebonnet
- Bronson
- Carlson
- Carlyle
- Country Life
- DEAL SUPPLEMENT
- DEVA
- Doctor's Best
- Dr. Berg
- Earth Harmony Naturals
- EZ Melts
- FAMILI+
- Force Factor
- ForestLeaf
- FREEDA
- Futurebiotics
- Garden of Life
- Generic
- GPGP GreenPeople
- H&D Labs Nutrition
- Healthy Origins
- HERBIFY
- Horbäach
- Ideal Infusion
- Igennus
- Incite Nutrition
- IRIDESICENT
- Jarrow Formulas
- Just Nutrients
- Kirkman
- Life Extension
- Lifeable
- LILICARE
- Livingood Daily
- MAJOR
- Mama Bear
- MaryRuth's
- MASON NATURAL
- Maxi Health
- MaxX Labs
- Mchokuu
- MegaFood
- Metabolic Maintenance
- Metagenics
- Micro Ingredients
- Microbiome Labs
- MoxyVites
- Natrol
- Natural Nutra
- Naturalis
- Nature's Bounty
- Nature's Bounty
- Nature's Nutrition
- Nature's Peak
- Nature's Truth
- Nature's Truth
- Nature's Way
- Nature's Wonder
- NatureBell
- NatureWise
- NEVISS
- NEW AGE
- Nivagen
- NOW
- NOW Foods
- NutraChamps
- NUTRAHARMONY
- Nutricost
- NUTRITION29
- Olympian Labs
- Piping Rock
- Prati Donaduzzi
- Pure Encapsulations
- Sandhu's
- SMARTERNUTRITION
- SmarterVitamins
- Solaray
- Solgar
- Source Naturals
- Spectraspray
- Stop Aging Now
- Superior Source
- SuperSmart USA LLC
- Swanson
- The Feel Great Vitamin Company
- The Pure Plant Company
- The Vitamin Shoppe
- Triquetra Health
- Unique Bundle Store
- UpNourish
- Venture Pal
- VEV
- Vitafusion
- Vital Nutrients
- Vitalitown
- Vitamatic
- VITBOOST
- Viva Naturals
- WeightWorld
- Yusiba
- Zahler
Frequently asked
How much does Vitamin D3 cost?+
The cheapest vitamin d3 we track is $0.02 per serving ($9.99 for 500 servings), against a typical $0.11 per serving across the 296 we can price per dose — about $0.60 a month at the cheapest. That's real cost per dose from live Amazon US prices as of October 2026, not the sticker price.
What is the best-value Vitamin D3 supplement?+
Micro Ingredients Vitamin D3 5,000 IU — $0.02 per serving ($9.99 for 500 servings), the lowest cost-per-dose vitamin d3 in our Amazon US catalog as of October 2026.
How much does Vitamin D3 cost per day?+
The cheapest vitamin d3 we track works out to $0.02 per serving, against a typical $0.11 per serving across the 296 we can price per dose; to reach the commonly-studied 2,000 IU/day dose the cheapest is $0.008/day. Retailers and review sites list a price and a serving size but rarely divide it out — this is what a day actually costs, as of October 2026.
What is the typical cost per dose for Vitamin D3?+
About $0.11 per serving across the 296 vitamin d3 products we can price per dose (combination products are left out — their single label dose belongs to whichever ingredient the product is built around) — the cheapest we track is $0.02 per serving, with most falling between $0.06 and $0.22.
What's the cheapest effective Vitamin D3?+
To reach the commonly-studied 2,000 IU/day dose, Micro Ingredients Vitamin D3 5,000 IU is the best value at $0.008 per day — cheaper than bottles that look low-priced per serving but are underdosed.
What is the highest-quality Vitamin D3 supplement?+
Of the 120 vitamin d3 brands ranked here, 5 hold a third-party certification we could verify in a public registry: BulkSupplements.com (NSF Certified for Sport), Nature Made (USP Verified), Nordic Naturals (NSF Certified for Sport), Sports Research (Informed Choice), Thorne (NSF Certified for Sport). Certification means an independent lab confirmed the label matches the contents and screened for contaminants — it does not rate how well the supplement works. The cheapest certified option is Vitamin D3 1000 IU (25 mcg) at $0.03 per serving.
Which Vitamin D3 brands are third-party tested?+
BulkSupplements.com — NSF Certified for Sport; Nature Made — USP Verified; Nordic Naturals — NSF Certified for Sport; Sports Research — Informed Choice; Thorne — NSF Certified for Sport. We only count a brand as tested when it appears in the certifier's own public registry (USP Verified, NSF Certified for Sport, Informed Choice), never on a claim printed on the label. The remaining 115 brands on this page have no certification we could verify.
Which Vitamin D3 is the top rated?+
We don't republish marketplace star ratings — they belong to the retailer, they move constantly, and a 4.6 average tells you nothing about what is in the capsule. The two things you can verify are what a dose costs and whether an independent lab checked the label. On both counts, Vitamin D3 1000 IU (25 mcg) stands out: NSF Certified for Sport certified at $0.03 per serving.
Independent testing
5 of 120 tracked Vitamin D3 brands here are flagged as carrying independent third-party testing — a voluntary check of a product's identity, potency and contaminants by an outside lab. It's a quality signal, not a value or efficacy claim. Confirm any brand's current status on the official registries:
Testing status is self-reported by the brand or drawn from public certification and may change — always verify on the official registry before purchase.
References & sources
- Vitamin D3 — Health Professional fact sheet — NIH Office of Dietary Supplements
- USP Verified product participants — U.S. Pharmacopeia
- NSF certified products — NSF
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.