CleanLabelReport
Supplement Review · Updated August 2026

Best Vitamin D + K2 Supplements 2026: What the Labels Show.

We read the labels of 29 vitamin D supplements. 21 of them are D3 on its own, with nothing to direct the calcium it raises. D3 raises the supply. MK-7 is the nutrient that acts on it. One capsule of 29 carried both, with the calcium and the uptake helper behind them.
The ProblemThe ChecksThe Ranking
Best vitamin D and K2 supplements 2026 ranked on D3 dose, MK-7 form, calcium and absorption support
The Problem

D3 raises calcium absorption. Then most labels stop.

Vitamin D3 has one job on a supplement panel and it does it well: it raises how much calcium you pull out of your food. If you have tested low, fixing that is worth doing. Raising the supply, though, is not the same as putting it to use, and a D3-only capsule has no say in what happens next. Vitamin K2 is the nutrient that switches on the proteins involved in that step. 21 of the 29 labels we read carry D3 and stop there.

Of the 8 labels that add K2, 3 use menaquinone-4, which the body clears within hours. Comparative work favors menaquinone-7 because it holds in the blood from one dose to the next, and that is the entire premise of a once-a-day capsule. A label that prints K2 without saying which one is not telling you what you bought.

Two lines almost nobody prints. The first is calcium, sitting in the same capsule so the K2 step has material available from the first dose instead of depending on what your last meal happened to contain: 1 label of 29. The second is an uptake helper, which counts for something when the two headline nutrients only absorb alongside what rides with them. One formula of 29 carried all four lines.

Been taking D3 for a year and your numbers barely moved?

Two things are worth checking before you raise the dose again. The first is the amount: a 400 to 2,000 IU drugstore softgel is a maintenance number, not a correction. The second is what came with it. D3 is fat-soluble, so it is absorbed alongside whatever else is in the capsule, and a bare tablet with no fat and no uptake support is the least helpful way to take it.

The Checks

Four checks. Three of them are about what happens after absorption.

01/04

D3 at 5,000 IU

Most adults who test low sit somewhere between 2,000 and 5,000 IU a day. A 400 to 1,000 IU softgel is a holding dose. 5,000 IU, or 125 mcg, is the number the correction work uses.

Vitamin D3 · 125 mcg
02/04

K2 as MK-7

K2 switches on the proteins involved in bone mineralization. Menaquinone-4 is cleared within hours; menaquinone-7 holds between doses, which is what makes a once-daily capsule reasonable. If the label just says K2, the form is the thing it left out.

Menaquinone-7
03/04

Calcium in the same capsule

A step that puts calcium to work needs calcium available to work on. A cofactor amount in the same capsule covers that from the first dose, rather than leaning on whatever your last meal contained.

Calcium · 210 mg
04/04

Something to help it absorb

Both headline nutrients here are fat-soluble, so how much you take up depends on what they travel with. Black pepper extract is the cheapest well-documented way to put an uptake helper on a panel. Almost nobody bothers.

BioPerine · 5 mg
Side by Side

The five, line by line.

Suppla D3 + K2#1 PickSports Research Vitamin D3 + K2#2NOW Mega D-3 & MK-7#3Thorne Vitamin D-5,000#4Nature Made Vitamin D3 2,000 IU#5
CriteriaSuppla D3 + K2Sports Research D3NOW Mega D-3Thorne D-5,000Nature Made D3
Checks Passed4 of 42 of 42 of 41 of 40 of 4
D3 at 5,000 IU✓✓✓✓−
K2 as MK-7✓✓✓−−
Calcium Included✓−−−−
Absorption Support✓−−−−
Vitamin D3 Dose5,000 IU5,000 IU5,000 IU5,000 IU2,000 IU
Vitamin K2 Dose100 mcg · MK-7100 mcg · MK-7180 mcg · MK-7nonenone
Third-Party Tested✓✓−✓✓
Our Rating9.48.78.37.87.3
Scroll the table

Doses read from each brand's published Supplement Facts panel in August 2026. MK-7 and MK-4 are the two common forms of vitamin K2; MK-7 has the longer half-life, which is what makes once-daily dosing sensible.

The Ranking

Top 5 vitamin D and K2 supplements, by the label.

No. 01
Suppla D3 + K2
Ranked #1 of 29 labels read

Suppla D3 + K2

D3 5,000 IU · K2 MK-7 100 mcg · Calcium 210 mg · BioPerine · 1 Capsule Daily

4/4 ChecksD3 5,000 IUK2 as MK-7 100 mcgThird-Party TestedGMP · Manufactured in USA60-Day Guarantee
9.4
Label Score
Strengths 09
  • 125 mcg of vitamin D3, which is 5,000 IU and 625 percent of the daily value.
  • 100 mcg of vitamin K2 as MK-7, the long-acting form that suits once-daily dosing.
  • Calcium at 210 mg in the same capsule, so the routing has something to act on.
  • BioPerine black pepper extract at 5 mg for uptake of the two fat-soluble vitamins.
  • Only formula of 29 that carried all four lines on one panel.
  • One small veggie capsule a day, taken with a meal that contains some fat.
  • 60 capsules is a two-month supply, not a one-month bottle.
  • Third-party tested, GMP certified, manufactured in the USA.
  • 60-day money-back guarantee.
Limitations 02
  • Online only, not sold in retail stores.
  • The 210 mg of calcium is a cofactor dose, not a replacement for a full calcium supplement.
The verdict Buying D3 by itself raises the supply and leaves everything after that to chance. Two other bottles on this page pair it with K2 as MK-7, which is the right start. This is the only one of the 29 we read that also carries calcium for that step to work on, and an uptake helper behind two fat-soluble nutrients. Four lines, one capsule, two months a bottle.
See Price and Availability ✓ 60-Day Money-Back Guarantee
The runners-up · 02 to 05
Sports Research Vitamin D3 + K2
No. 02

Sports Research Vitamin D3 + K2

Vegan Softgel · D3 5,000 IU from Lichen · K2 MK-7 100 mcg · Coconut MCT
2 of 4Vegan CertifiedThird-Party Tested
8.7
Label
Strengths
  • The right pair at the right numbers: 5,000 IU of D3 with 100 mcg of K2 as MK-7.
  • Plant-based D3 from lichen and K2 from fermented chickpea, in a vegan softgel.
  • Coconut MCT oil in the softgel gives the fat-soluble pair something to ride on, and every batch is third-party tested.
Limitations
  • No calcium in the capsule, so the K2 step depends entirely on what your last meal supplied.
  • No uptake cofactor beyond the oil base.
  • Softgel format, which is bulkier than a capsule for the same two nutrients.
The verdict The best of the pairs. It gets both headline numbers right, it is genuinely vegan, and the testing is stated. It stops at two ingredients, which is where the last two checks live.
NOW Mega D-3 & MK-7
No. 03

NOW Mega D-3 & MK-7

Veg Capsule · D3 5,000 IU · K2 MK-7 180 mcg as MenaQ7 · Soy-Free
2 of 4Highest K2 DoseRetail Brand
8.3
Label
Strengths
  • The largest K2 dose on this page at 180 mcg, and it is MenaQ7 branded MK-7 from chickpea.
  • The full 5,000 IU of D3 alongside it, in a veg capsule, widely stocked and inexpensive.
  • Both actives printed with their own numbers, no blend.
Limitations
  • No calcium and no uptake cofactor, so it covers the same two checks as the pick above it.
  • Modified starch and maltodextrin in a capsule that only needs to carry two nutrients.
  • No third-party certification stated on the label.
The verdict A generous K2 dose on a familiar shelf brand, at a price that is hard to argue with. Same two checks as second place, with a longer other-ingredients line and no testing claim.
Thorne Vitamin D-5,000
No. 04

Thorne Vitamin D-5,000

Veg Capsule · D3 5,000 IU · No K2 · NSF Certified for Sport
1 of 4Practitioner BrandNSF Certified
7.8
Label
Strengths
  • A clean 5,000 IU of D3 from a brand with an unusually strong testing record.
  • NSF Certified for Sport, which is the strictest certification on this page.
  • Short, honest other-ingredients line.
Limitations
  • No K2 anywhere on the label, so nothing acts on the calcium the D3 helps you absorb.
  • No calcium and no uptake cofactor either.
  • You end up buying a second bottle to finish the job.
The verdict If you want D3 and only D3, this is the best-made version of it on the page. As a bone and heart routine it covers one of four checks, and it leaves the other three to a bottle you have not bought yet.
Nature Made Vitamin D3 2,000 IU
No. 05

Nature Made Vitamin D3 2,000 IU

Softgel · D3 2,000 IU · Soybean Oil Base · USP Verified · No K2
0 of 4DrugstoreUSP Verified
7.3
Label
Strengths
  • USP Verified, which is a real third-party check on label accuracy.
  • The cheapest and most available option here, in every pharmacy in the country.
  • Softgel with an oil base, which suits a fat-soluble vitamin.
Limitations
  • 2,000 IU is a maintenance number, not the correction dose the other four carry.
  • No K2, no calcium, nothing to help uptake.
  • Soybean oil base and a gelatin softgel, so it is not vegetarian.
The verdict An accurate label around a small number. If you already test in range and just want to hold there, it does that. Measured against the four checks on this page, it clears none of them.
What Changes, When

What to expect on one capsule a day.

Week 01 to 02

The routing starts

MK-7 reaches a steady level in circulation within the first days of daily use. Nothing to feel here, but the part most labels leave out is now running.

Week 04 to 08

D status climbs

Blood vitamin D rises gradually on a daily 5,000 IU intake. This is the window where people who started low tend to notice the difference in everyday energy.

Month 03 +

Levels hold

With daily use the level stabilizes instead of sliding back through winter. One capsule, two months a bottle, and no gap in the routine.

FAQ

Questions we get asked.

Four things on one panel: D3 at 5,000 IU, K2 stated as MK-7 rather than just K2, calcium in the same capsule, and something that helps two fat-soluble vitamins absorb. Most labels stop at the first one.
The first raises how much calcium you take up from food. The second switches on the proteins involved in putting it into bone. Buying one without the other covers the supply side and leaves the rest of the chain unattended, which is why the pair keeps showing up on one label.
Blood levels move slowly. On a daily 5,000 IU intake most people see a meaningful shift across 4 to 8 weeks, and the level holds from about month three onward as long as the habit holds.
Every day is simpler and steadier. Time spent indoors, sunscreen, window glass, how far north you live and your skin tone all change how much your skin makes on its own, so for most adults the summer gap is narrower than it feels. Talk to your provider first if you take a blood thinner, since vitamin K interacts with that class of medication.
What we would buy

D3, MK-7, calcium, cofactor. One capsule.

One formula of 29 passed all four checks. This is it.

Our top pick
Suppla D3 + K2
Suppla D3 + K2
Suppla · 60 veggie capsules
9.4 / 10
  • Vitamin D3 at 125 mcg, which is 5,000 IU
  • Vitamin K2 at 100 mcg as MK-7, the long-acting form
  • Calcium 210 mg and BioPerine 5 mg on the same panel
  • One small veggie capsule a day, 60 per bottle, two months
  • Third-party tested, GMP certified, manufactured in the USA
See Price and Availability →
✓ 60-Day Money-Back Guarantee
The Evidence

Why D3 and K2 belong on the same label.

Vitamin D3 increases intestinal calcium absorption, while vitamin K2 activates the vitamin K-dependent proteins involved in bone mineralization. Comparative work on the two K2 forms has reported that menaquinone-7 remains in circulation far longer than menaquinone-4, which is what makes once-daily dosing reasonable, and a three-year study of low-dose menaquinone-7 reported support for bone mineral density in postmenopausal women. Low vitamin D status is common wherever sun exposure is limited, which is why the D3 half of this pair has never needed marketing.

References

  1. Holick MF. Vitamin D deficiency. N Engl J Med. 2007. PubMed
  2. Schurgers LJ, et al. Vitamin K-containing dietary supplements: comparison of synthetic vitamin K1 and natto-derived menaquinone-7. Blood. 2007. PubMed
  3. Sato T, et al. Comparison of menaquinone-4 and menaquinone-7 bioavailability in healthy women. Nutr J. 2012. PubMed
  4. Knapen MH, et al. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporos Int. 2013. PubMed
  5. Bischoff-Ferrari HA, et al. Estimation of optimal serum concentrations of 25-hydroxyvitamin D for multiple health outcomes. Am J Clin Nutr. 2006. PubMed

Editorial Disclosure

Affiliate Disclosure: We may earn a commission when you click links on this page and make a purchase. Placements are decided from each product's published label data measured against the criteria on this page. Competitor formulas reflect each brand's publicly listed specifications as of the update date shown and may vary by SKU or batch. Brand names belong to their respective owners and are referenced for comparison only. Competitor information reflects publicly available labels as of August 2026.

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Talk to your healthcare provider before starting any supplement, especially if you take medication, are pregnant, or nursing.

© 2026 Clean Label Report. All rights reserved.

Suppla D3 + K2
9.4 / 10 · #1 of 29 labels
See Price and AvailabilitySee Price →

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