Vitamin K2 + D3, Extra Strength, 120 Capsules
by Futurebiotics
Compare Prices
At 10,000 IU of cholecalciferol paired with 120 mcg of MK-7 menaquinone, this is a therapeutic-strength formula built for correcting deficiency rather than just maintaining levels. Best for Adults with blood-confirmed vitamin D deficiency who haven't responded to 5,000 IU doses and People in northern climates or desk-bound lifestyles with minimal sun exposure.
According to the AIScored 0–100 scoring system, Vitamin K2 + D3, Extra Strength, 120 Capsules by Futurebiotics scores 77.0/100, ranking #4 out of 6 products in Vitamin K (2026). Strongest category: Side Effects (91.0/100). Weakest: Certifications (37.0/100).
Is Vitamin K2 + D3, Extra Strength,... worth buying?
“Futurebiotics K2 + D3 Extra Strength combines 10,000 IU of D3 with MK-7, the most bioactive K2 form, and users have reported seeing the difference in their blood test results. With no gluten, soy, or artificial additives, it's a genuinely clean formula if you're correcting a vitamin D deficiency.”
What Do Reviewers Say About Vitamin K2 + D3, Extra Strength, 120 Capsules?
Sample excerpts from currently available source material used in this product analysis.
"The perfect ratio of vitamin D3 to K2. Vitamin D helps improve calcium absorption, helps the growth and development of bones and teeth, helps maintain nerve and muscle health, and promotes metabolism. The D3/K2 ratio of this bottle is perfe..."
"Ideal vitamin D is presented in a highly absorbable form, ensuring maximum bioavailability and effective maintenance of this important nutrient in the body. Combined with vitamin K2 (menaquinone, MK), which plays a key role in maintaining b..."
"Great. Excellent! The quality of this product is simply amazing. My whole family, even my neighbors, use it. We all had a deficiency, and this product solved that problem. The ingredients are excellent and the formula is good. Our health is..."
"Great. I regularly buy this brand's vitamin. The quality is excellent, and the dosage is just right for us, as we live in a region with little sun. The taste is neutral, and the capsules are small. The benefits are enormous. It's an essenti..."
"Excellent. Vitamin D is well known, especially when combined with vitamin K2, because it helps the body absorb the vitamin. This vitamin should be taken after a meal rich in healthy fats, and should not be taken at night so as not to interf..."
How does Vitamin K2 + D3, Extra Strength, 120 Capsules score?
Detailed score breakdown and key findings from our analysis of 50 reviews across 1 source.
Pros
- +10,000 IU suits people with confirmed deficiency — multiple reviewers specifically switched from 5,000 IU after failing to hit target levels
- +K2 as MK-7 (120 mcg) is the superior form: long half-life means once-daily dosing works, and the dose sits in the effective range used in studies
- +Clean excipient list — microcrystalline cellulose, cellulose capsule, magnesium stearate, silicon dioxide — no soy, gluten, or fillers reviewers flag
- +120 capsules gives four months at daily use; reviewers consistently cite strong value versus pharmacy pricing
- +Neutral taste, no odour, medium capsule size — zero complaints about tolerability across 50 reviews
Cons
- -No independent third-party testing — label says 'Lab Tested' but this is self-declared; specs confirm no external verification
- -10,000 IU is not a maintenance dose — requires blood testing before and during use; one reviewer explicitly notes skipping this step and risking over-supplementation
- -D3 sourced from lanolin (standard cholecalciferol) — not suitable for vegans despite the cellulose capsule shell
- -K2 form is unbranded MK-7, not a patented ingredient like MenaQ7 — potency and purity can vary without third-party confirmation
Best For
Watch Out
- !10,000 IU daily can cause toxicity with prolonged unsupervised use — get tested before starting and recheck after 2-3 months
- !K2 affects blood clotting pathways — anyone on warfarin or anticoagulants must consult a doctor before use
- !Not for use during pregnancy or breastfeeding, per product label
- !No third-party verification means you're relying solely on Futurebiotics' own quality controls
What is Vitamin K2 + D3, Extra Strength, 120 Capsules?
Vitamin K2 + D3, Extra Strength, 120 Capsules is a vitamin k product by Futurebiotics, scoring 77.0/100 on AIScored.
- • Product overview Description Vitamin K2 As MK-7 Bone & Heart Support 2 in 1 Formula Free of Gluten and Soy Dietary Supplement Lab Tested • GMO Free Futurebiotics® Vitamin K2 + D3 provides the perfect match.
- • While the benefits of Vitamin D are well known, many don't realise that Vitamin D needs Vitamin K2 to maximise its benefits.
- • This formula helps the proper absorption of calcium with D3, while providing the correct distribution to your bones where you need it most.
- • Futurebiotics® K2 + D3 are truly the perfect pair for healthy bone & heart support.
- • Suggested use As a food supplement for adults, take one capsule daily, preferably with a meal or as directed by a healthcare professional.
- • Other ingredients Microcrystalline cellulose, modified cellulose capsule, magnesium stearate, silicon dioxide.
- • Warnings Do not take this product if you are pregnant or breastfeeding.
- • Consult a doctor before taking this product if you have a medical condition or are taking medication, especially anticoagulant drugs.
- • Do not use if the seal under the cap is broken or missing.
- • Keep out of the reach of children.
- • Protect from light.
- • 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:1 Capsule Servings Per Container:120 Amount per serving %Reference Intake Vitamin D3 (as cholecalciferol) 250 mcg (10,000 IU) 1250% Vitamin K2 (as MK7 Menaquinone) 120 mcg †.
Is Vitamin K2 + D3, Extra Strength, 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.
How Does Vitamin K2 + D3, Extra Strength, 120 Capsules Compare?
See how this product stacks up against the top-rated vitamin k in our database.
| Product | Score | Price |
|---|---|---|
| Vitamin K2 + D3, Extra Strength,... (this) | 77.0 | £14.72 |
| NOW Foods MK-7 Vitamin K-2 100mc... | 85.0 | £21.99 |
| MK-7 Vitamin K-2, 100 mcg, 120 V... | 83.0 | £24.23 |
| Vitamin K2 + D3, 120 Capsules | 80.0 | £12.99 |
Price History (90 days)
Quick Facts
- Vegan
- No
Frequently Asked Questions
Is Vitamin K2 + D3, Extra Strength, 120 Capsules worth buying in 2026? ▼
What is the best price for Vitamin K2 + D3, Extra Strength, 120 Capsules in the UK? ▼
What are the pros and cons of Vitamin K2 + D3, Extra Strength, 120 Capsules? ▼
Is Vitamin K2 + D3, Extra Strength, 120 Capsules third-party tested? ▼
How does Vitamin K2 + D3, Extra Strength, 120 Capsules compare to NOW Foods MK-7 Vitamin K-2 100mcg - 60 Veg Capsules? ▼
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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