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Category · 7 products

Vitamin

Single vitamins at meaningful doses. Cheap, well-studied, and easy to get wrong without a blood test.

Category statistics and scoring

7.1

$0.05

Compare the top 3 → Filter the full index →

Ranked

Every Vitamin product we score

Same formula as the rest of the site. Position here has never been bought.

Reading guide

How to read this shelf

Vitamin D3, K2, C and combinations. The catalog stores amounts in milligrams. Vitamin D and K2 are shown here in micrograms, and the label may use IU (for vitamin D, 1 µg equals 40 IU by definition).

Check on every label

The unit on the label (µg, mg or IU) before comparing with the figures here.
For K2, which form is named (MK-4 or MK-7). The catalog stores the total.
Liquid drops: how many drops the label calls a serving, since the container count depends on it.

Catalog figures for this shelf (7)

Products: 7
Most common lead ingredients: Vitamin D3 (3), Vitamin C (2), Magnesium (1)
Forms: Softgel (4), Capsule (3)
Range of Vitamin D3 per serving: 50 µg to 125 µg across 3 products
Price per serving: $0.07 to $1.37
Testing listed: 3 of 7 list third-party testing · 2 publish a CoA
Multi-ingredient products: 2 of 7 list three or more ingredients

Counts and ranges are catalog facts about the labels, not a ranking. The score, evidence and safety sections below are separate.

Top 3 for this shelf

The three best-evidenced options here, with the plain verdict and the catch first. The full ranking continues below.

Nordic Naturals

Vitamin D3 5000

Vitamin

Vitamin per serving: Vitamin D3 125 µgSoftgel · 120 servings
Price per serving: $0.21$24.95 · 120 servings
Testing: 3rd-party listed · public lab certificate

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 8.4/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

100%

of trial dose

$0.08

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with www.nordic.com

Verdict: This Nordic Naturals Vitamin D3 5000 scores 9.4, making it one of the highest-scoring products on the site. It delivers 0mg of Vitamin D3, inside the studied range of 0–0mg with grade A evidence (strong human trial data). Transparency is a clear strength (score: 9.0), with third-party testing and a public lab certificate. At $0.08/day it's priced well for what you get.

The catch: Vitamin D3 (0.125mg is 250% of the 0.05mg trial dose) is well above the trial dose. More is not always better.

DoNotAge

Pure Vitamin D3, K2 & Magnesium

Vitamin

Vitamin per serving: Magnesium 250 mgElemental vs compound: check label
Price per serving: $0.07$24.00 · 366 servings
Testing: None listed

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 8.2/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

100%

of trial dose

$0.08

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with donotage.org

Verdict: This DoNotAge Pure Vitamin D3, K2 & Magnesium scores 8.2, making it a strong scorer. It delivers 250mg of Magnesium, inside the studied range of 200–500mg with grade A evidence (strong human trial data). The quality transparency (5.0) is limited by the lack of third-party testing. At $0.08/day it's priced well for what you get.

The catch: No third-party testing, which caps the quality transparency.

Nordic Naturals

Vitamin D3+K2

Vitamin

Vitamin per serving: Vitamin D3 50 µg+ Vitamin K2 90 µg
Price per serving: $0.33$19.95 · 60 servings
Testing: 3rd-party listed · public lab certificate

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 8.1/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

100%

of trial dose

$0.33

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with www.nordic.com

Verdict: This Nordic Naturals Vitamin D3+K2 scores 8.9, making it one of the highest-scoring products on the site. It delivers 0mg of Vitamin D3, inside the studied range of 0–0mg with grade A evidence (strong human trial data). Transparency is a clear strength (score: 9.0), with third-party testing and a public lab certificate. At $0.33/day it's priced well for what you get.

Quick compare

Top 5 in Vitamin

Sorted by overall score. Same numbers you'll see on each product page.

#	Product	Score	Primary active	Dose vs RCT	Price/mo	Value rank	Dose+Evidence
#1	Vitamin D3 5000 Nordic Naturals	8.4/10	Vitamin D3 0mg	✅ 100%	$6/mo	Top 17%	10.0/10
#2	Pure Vitamin D3, K2 & Magnesium DoNotAge	8.2/10	Magnesium 250mg	✅ 100%	$2/mo	Top 17%	10.0/10
#3	Vitamin D3+K2 Nordic Naturals	8.1/10	Vitamin D3 0mg	✅ 100%	$10/mo	Mid-range	9.0/10
#4	Jarrow Formulas Vitamin D3, 5000 IU (125 mcg) Jarrow Formulas	7.5/10	Vitamin D3 0mg	✅ 100%	$13/mo	Top 17%	10.0/10
#5	Vital Proteins Beauty Boost Capsules Vital Proteins	6.0/10	Vitamin C 180mg	⚠️ 90%	$30/mo	Bottom 25%	6.9/10

Jarrow Formulas

Jarrow Formulas Vitamin D3, 5000 IU (125 mcg)

Vitamin

Vitamin per serving: Vitamin D3 125 µgSoftgel · 100 servings
Price per serving: $0.13$12.74 · 100 servings
Testing: None listed

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 7.5/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

100%

of trial dose

$0.05

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with jarrow.com

Vital Proteins

Vital Proteins Beauty Boost Capsules

Vitamin

Ingredients listed: 7 ingredients listedlargest listed: Vitamin C 180 mg
Price per serving: $1.00$30.00 · 30 servings
Testing: None listed

Elemental vs compound: check label

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 6.0/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

90%

of trial dose

$2.78

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with www.vitalproteins.com

Tru Niagen (ChromaDex)

Tru Niagen Immune

Vitamin

Ingredients listed: 4 ingredients listedlargest listed: Vitamin C 180 mg
Price per serving: $1.37$41.00 · 30 servings
Testing: None listed

Elemental vs compound: check label

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 5.8/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

100%

of trial dose

$2.73

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with www.truniagen.com

Life Extension

Super K

Vitamin

Vitamin per serving: Vitamin C 10 mgSoftgel · 90 servings
Price per serving: $0.33$30.00 · 90 servings
Testing: 3rd-party listed · no public lab certificate

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 5.8/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

of trial dose

$16.67

per research-dose day, not label serving

0Trial dose2×

Catalog price · Confirm current price with www.lifeextension.com

Connected

What defines this shelf

Actives used here

Vitamin D3 (3)Vitamin C (3)NR (2)Magnesium (1)Vitamin K2 (1)Vitamin E (1)Selenium (1)Vitamin B6 (P-5-P) (1)Riboflavin (B2) (1)Folate (5-MTHF) (1)Zinc (1)Curcumin (1)

Brands competing

Nordic Naturals (2)DoNotAge (1)Jarrow Formulas (1)Vital Proteins (1)Tru Niagen (ChromaDex) (1)Life Extension (1)

Consumer signals

7 products with consumer ratings 5 high-confidence signals 5,684 total consumer reviews

Other categories

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