Vitamin D3 & K2, 120 Capsules
by NOW Foods
Compare Prices
NOW Foods pairs 1,000 IU of D3 with 45 mcg of K2 in a vegetarian capsule — a sensible combination that reviewers consistently praise for bone support, energy, and mood. Best for Adults in northern climates maintaining D3 levels through autumn and winter and People over 40 wanting combined bone and cardiovascular calcium support in one daily capsule.
According to the AIScored 0–100 scoring system, Vitamin D3 & K2, 120 Capsules by NOW Foods scores 75.0/100, ranking #25 out of 35 products in Vitamin D (2026). Strongest category: Side Effects (92.0/100). Weakest: Certifications (52.0/100).
Is Vitamin D3 & K2, 120 Capsules worth buying?
“NOW Foods combines 1,000 IU of D3 with 45 mcg of K2 in small vegetarian capsules, which is an effective pairing that helps calcium go where you need it — to your bones rather than soft tissue. Scoring 79/100, it's a dependable choice from a trusted brand with over 50 years' experience, and the capsules are genuinely easy to take daily.”
What Do Reviewers Say About Vitamin D3 & K2, 120 Capsules?
Sample excerpts from currently available source material used in this product analysis.
"Its quality is excellent. It contains vitamin D3 and vitamin K. The dosage is one capsule. It is beneficial for those who do not get enough sun, and it is good for bones and supports the immune system for those who are deficient in these nu..."
"NOW Vitamin D-3 – Essential Sunshine in a Bottle!” 🌞 When it comes to quality, NOW Foods always delivers, and this Vitamin D-3 is no exception. Each softgel provides 1000 IU of pure potency, perfect for supporting bone health, immune defens..."
"It's convenient to be able to take D and K together. Even if you get enough sun exposure, you can still make up for any deficiencies. The small capsules are easy to take, and there's no taste or smell, so it's easy to continue taking. I thi..."
"Good combination. i heard that when you take Vitamin D you should take K2 with it for good absorbing to the bone .. there's no taste in it .. the size of the capsule and package is small and you take 1 capsule daily this is a good dosage ....."
"I've been using the NOW Vitamin D-3 & K-2 supplement for a few weeks, and I'm very satisfied with it. The quality of the product is excellent — you can tell it's made with care and effective ingredients. The package is sturdy and easy to op..."
How does Vitamin D3 & K2, 120 Capsules score?
Detailed score breakdown and key findings from our analysis of 50 reviews across 1 source.
Pros
- +D3 and K2 combined in one small capsule — reviewers consistently value the convenience and synergistic pairing
- +Tasteless, odourless, and easy to swallow; multiple reviewers with pill-swallowing difficulties found no issues
- +Clean formula: non-GMO, free from gluten, soy, dairy, egg, fish, and shellfish
- +Reviewers report improved energy, mood, and bone comfort after consistent daily use
- +Competitive price per capsule from a brand with a 56-year manufacturing track record
Cons
- -1,000 IU D3 is a maintenance dose — unlikely to correct diagnosed deficiency without higher dosing
- -K2 at 45 mcg is below the 100–180 mcg used in most clinical bone and cardiovascular research
- -No independent third-party testing to verify potency or purity
- -D3 is lanolin-derived, making this unsuitable for vegans despite the plant-based capsule shell
Best For
Watch Out
- !K2 affects vitamin K-dependent clotting factors — avoid without medical supervision if taking warfarin, coumadin, or heparin
- !1,000 IU is unlikely to correct a significant deficiency; blood testing before and after supplementation is advisable
- !Benefits require consistent daily use — several reviewers note effects only become apparent after weeks of regular intake
What is Vitamin D3 & K2, 120 Capsules?
Vitamin D3 & K2, 120 Capsules is a vitamin d product by NOW Foods, scoring 75.0/100 on AIScored.
- • Product overview Description Vitamin D3 1,000 IU / Vitamin K2 45 mcg Supports Bone Health Plus Cardiovascular Support Non-GMO Food supplement Kosher Family-run since 1968 GMP quality assured Halal NOW combines two nutrients extensively researched for their contribution to the health of bones, teeth and the cardiovascular system.
- • Vitamin D3 promotes calcium transport and absorption.
- • Recent studies indicate that vitamin D3 may play a role in proper insulin action and glucose metabolism and has an important function within the immune system.
- • Vitamin K is critical for the formation of a healthy, strong bone matrix.
- • Vitamin K's role in arterial health revolves around its ability to support proper calcium metabolism in vascular structures.
- • Vitamin K2 is a readily active and biologically available form of vitamin K.
- • Suggested use Take 1 capsule 1 to 2 times daily with food.
- • Other ingredients Rice flour, hypromellose (cellulose capsule), ascorbyl palmitate and silicon dioxide.
- • Not manufactured with wheat, gluten, soya, milk, egg, fish, shellfish or sesame ingredients.
- • Produced in a GMP facility that processes other ingredients containing these allergens.
- • Made and quality tested in the UK with globally sourced ingredients.
- • Warnings Natural colour variation may occur in this product.
- • Store in a cool, dry place after opening.
- • For adults only.
- • Consult physician if pregnant/nursing, taking any anti-coagulant (such as warfarin, coumadin, heparin) or other medication, or have a medical condition.
- • Keep out of reach of children.
- • 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.
Is Vitamin D3 & K2, 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 D3 & K2, 120 Capsules worth buying in 2026? ▼
What is the best price for Vitamin D3 & K2, 120 Capsules in the UK? ▼
What are the pros and cons of Vitamin D3 & K2, 120 Capsules? ▼
Is Vitamin D3 & K2, 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.
What Are Other Top Vitamin D?
Other top-rated vitamin d you might want to compare.
Feedback & Suggestions
Spotted an issue? Wrong price, incorrect data, or something else off? Let us know and we'll fix it.
Missing a product you'd like us to review? Tell us the product name and we'll consider adding it.