Vitamin K2 + Vitamin D3, 120 Capsules
by Nutricost
Compare Prices
Pairing D3 with K2 MK-7 is one of the better-evidenced decisions in supplementation, and Nutricost delivers it cleanly at 5000 IU cholecalciferol plus 100 mcg menaquinone-7 per softgel. Best for Adults with confirmed or suspected vitamin D deficiency who want a cost-effective high-dose protocol and People over 40 focused on directing calcium to bone rather than arteries.
According to the AIScored 0–100 scoring system, Vitamin K2 + Vitamin D3, 120 Capsules by Nutricost scores 81.0/100, ranking #9 out of 35 products in Vitamin D (2026). Strongest category: Value For Money (91.0/100). Weakest: Certifications (42.0/100).
Is Vitamin K2 + Vitamin D3, 120 Capsules worth buying?
“Nutricost's Vitamin K2 + D3 gives you the superior bioavailable MK-7 form of K2 alongside 5,000 IU of D3 in tiny, easy-to-swallow softgels that need no separate fat source. At 82/100, it genuinely raises vitamin D levels — reviewers have even posted their lab results proving it works.”
What Do Reviewers Say About Vitamin K2 + Vitamin D3, 120 Capsules?
Sample excerpts from currently available source material used in this product analysis.
"amazing. The quality and ingredients are great. The best vitamin D supplement is the one with K2 for better absorption. You just need to determine your dosage with a nutritionist or your doctor if you suffer from a deficiency. The pills are..."
"I used to take a completely different D3 so I have something to compare it to, this one is better because it is noticeable after taking it, I feel like it adds a little energy, liveliness, the lethargy and "fatigue" that I always have in th..."
"D3K2👍🏼. 100 mcg Vitamin K2 per serving 125 mcg Vitamin D3 per serving Dietary supplement Quality guaranteed by Nutricost® Quality tested in a third-party lab cGMP registered facility Non-GMO Gluten-free Promotes activation of Matrix GLA, a..."
"Great!. Really happy with this supplement so far! The combination of K2 and D3 is exactly what I was looking for — it’s great for supporting calcium absorption, bone strength, and overall wellbeing. The softgels are small and easy to swallo..."
"High-quality vitamin for health. The capsule size is very small, to strengthen immunity it is exactly what is needed in the fall, but I need to buy more, because I have only been taking it for 2 months. The dosage is high and the quality is..."
How does Vitamin K2 + Vitamin D3, 120 Capsules score?
Detailed score breakdown and key findings from our analysis of 49 reviews across 1 source.
Pros
- +K2 is supplied as MK-7 (menaquinone-7) — the longer-acting form with significantly better bioavailability than the cheaper MK-4 used in many budget products
- +5000 IU D3 is a genuinely effective dose for correcting deficiency, not the token 400–1000 IU found in most multivitamins
- +Softgel format in sunflower oil delivers fat-soluble vitamins in their ideal absorption medium
- +120 softgels at four months' supply represents strong value — reviewers repeatedly flag the price-to-quantity ratio as a key reason to buy
- +Small capsule size with neutral taste; multiple reviewers with no swallowing difficulties, no aftertaste reported
Cons
- -No verified third-party batch testing — the product specs confirm third_party_tested is false, despite some label copy referencing lab testing
- -Gelatin softgel is not suitable for vegans or vegetarians
- -5000 IU daily is a high-dose protocol; without blood monitoring it is easy to overshoot optimal levels long-term
- -K2 at 100 mcg is workable but some clinical protocols use 180–200 mcg alongside high-dose D3
Best For
Watch Out
- !5000 IU daily is not appropriate for everyone — get baseline 25(OH)D tested before starting and retest every 3–6 months
- !Gelatin capsule: not suitable for vegans or those with religious dietary restrictions
- !No independently verified third-party testing despite label claims; GMP facility status is a manufacturing standard, not product-level batch certification
What is Vitamin K2 + Vitamin D3, 120 Capsules?
Vitamin K2 + Vitamin D3, 120 Capsules is a vitamin d product by Nutricost, scoring 81.0/100 on AIScored.
- • Product overview Description 100 mcg Vitamin K2 Per Serving 125 mcg Vitamin D3 Per Serving Food Supplement Nutricost® Quality Guaranteed Third-Party Tested GMP Compliant Facility Non-GMO Product Gluten-free Assists in the activation of the Matrix GLA, a protein that aids in preventing calcium build-up.
- • 100 mcg of Vitamin K2 (mk7) and 5000 IU of Vitamin D3 in every serving.
- • Suggested use As a food supplement, take one capsule daily with 250–350 ml (8–12 oz) of water or as directed by your healthcare professional.
- • Other ingredients Softgel (gelation), glycerin, purified water, added colour), sunflower oil.
- • Warnings For healthy individuals aged 18 years and over.
- • Consult a healthcare professional before use if you are pregnant or breastfeeding, taking medication, or have a medical condition.
- • Keep out of the reach of children.
- • Do not use if the safety seal is broken or missing.
- • Notice: Store in a cool, dry place.
- • Disclaimer While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site.
- • Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed.
- • We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb.
- • This website has been machine translated as a courtesy to customers.
- • iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
- • Supplement information Serving size:one softgel Servings per container:120 Amount per serving %DV Calories 5 Vitamin D3 (as cholecalciferol) 125 mcg (5,000 IU) 625% Vitamin K2 (as menaquinone-7) 100 mcg 83% *Percent Reference Intakes (RI) are based on a 2,000 calorie diet.
- • Visit manufacturer's site.
Is Vitamin K2 + Vitamin D3, 120 Capsules Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
Price History (90 days)
Quick Facts
- Vegan
- No
Frequently Asked Questions
Is Vitamin K2 + Vitamin D3, 120 Capsules worth buying in 2026? ▼
What is the best price for Vitamin K2 + Vitamin D3, 120 Capsules in the UK? ▼
What are the pros and cons of Vitamin K2 + Vitamin D3, 120 Capsules? ▼
Is Vitamin K2 + Vitamin D3, 120 Capsules third-party tested? ▼
What the Data Says About Vitamin D
Why do 97% of UK vitamin D supplements lack third-party certification?
Only 1 out of 35 vitamin D products we scored has independent certification. That's 97% without any third-party verification of purity, potency, or label accuracy.
This is worse than most supplement categories. The reason is simple: UK law doesn't require it, and testing costs money. Most vitamin D brands sell on price alone, especially in the D3-only space where the raw ingredient is cheap. Certification adds cost that budget brands won't absorb.
What does this mean for you? Without third-party testing, you're trusting the manufacturer's label claims. A 2021 study in Nutrients found that vitamin D supplements varied from 52% to 135% of their labelled dose. That's a problem if you're relying on a specific daily intake.
Among the 35 products we scored, the top performers are all from brands with strong manufacturing track records: NOW Foods D3 5000 IU and Thorne Vitamin D + K2 both score 87/100 overall. Thorne holds the highest certification score in the category at 85/100. If independent testing matters to you, that's the product to look at.
Do you need vitamin K2 with high-dose vitamin D?
Probably yes at high doses, and our data backs the pairing. Thorne Vitamin D + K2 Liquid is the only D3+K2 combo product in our 35-product database that scores 87/100 overall, matching the top-ranked D3-only options from NOW Foods. It also holds the highest certification score in the category at 85/100.
Here's the science behind it. Vitamin D increases calcium absorption from food. Vitamin K2 activates proteins that direct that calcium into bones and teeth, keeping it out of your arteries and soft tissue. At standard doses (1000-2000 IU daily), most people get enough K2 from diet to handle the extra calcium. At 4000-5000 IU daily, the calcium load increases enough that K2 becomes a more serious consideration.
The Endocrine Society doesn't yet include K2 in its vitamin D guidelines. But a growing body of research, including a 2019 meta-analysis in International Journal of Molecular Sciences, shows the D3+K2 combination improves bone mineral density more than D3 alone.
If you eat K2-rich foods regularly (natto, hard cheese, egg yolks, chicken liver), a standalone D3 product like NOW Foods D3 5000 IU 360 Softgels (87/100) is a solid choice. If your diet is low in K2, or you're taking 4000+ IU of D3 daily, Thorne D + K2 covers both bases in one product.
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
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