Vitamin K2 MK-7 200mcg — Natto-Derived
200mcg MK-7 vitamin K2 — fermented natto-derived. Supports bone mineral density and cardiovascular health.
What does optimal health cost per day?
Less than a coffee top-up. Optimal nutrition for 23p/day — the most cost-effective investment in your health.
Free Vitamin C 1000mg with orders over £40
While stocks last · auto-added at checkout
Supply size
Most customers reorder this monthly. Each pack lasts ~30 days.
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Your daily health investment
£0.37
per day
£2.59
per week
£10.99
per month
Less than a daily coffee — for daily nutritional support from Vitamin K2.
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Price locked forever — we never raise your subscription price. Cancel any time, no fees.
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Only £2.99 — credited toward your first full order
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Limited spotsPool orders with other Vitamin buyers. The more people join, the more everyone saves. Next group buy runs when we hit 50 registrations.
📦 What to expect when it arrives
Premium box
Double-sealed. No cheap poly bags — every Medibro order ships in a quality box.
Amber glass
UV-protective amber glass preserves potency. Satisfying click-lid seal.
Little extras
Every first order includes a usage guide and a surprise freebie — see what you get.
Start today
Take your first dose the day it arrives — don't wait for a 'perfect moment'.
Your 30-day journey starts today
Future you will look back on this moment.
Based on typical customer reports. Individual results vary. Backed by our 30-day guarantee.
Premium packaging, inside and out
Amber glass jar
Blocks UV degradation, no plastic leaching
100% recyclable
Jar, cap, and box are fully kerbside recyclable
No artificial fillers
No magnesium stearate, silicon dioxide, or titanium dioxide
- Free UK delivery over £35
- 14-day hassle-free returns
- Secure checkout, audit-logged
- Manually compliance-reviewed
Order dispatched, tracking info sent. Most customers take their first dose the day it arrives.
Research shows it takes ~14 days to anchor a new habit. By now, most customers have found their ideal time of day.
At 8 weeks, customers report the strongest improvements. Consistency is everything with nutritional supplements.
Over 90% of Medibro subscribers are still on the same product at 3 months — the clearest signal a supplement is working.
Vitamin K2 MK-7 activates two critical proteins: osteocalcin (directs calcium into bone matrix) and Matrix Gla Protein or MGP (prevents calcium from depositing in arteries). The Rotterdam Study found high K2 intake associated with 57% lower cardiovascular mortality.
MK-7 has a 72-hour half-life, making once-daily dosing effective. Our MK-7 is derived from natto (fermented soy) fermentation — the same source used in clinical trials.
Benefits
- ✓Bone density
- ✓Cardiovascular health
- ✓Calcium regulation
- ✓Arterial health
Dosing Guide
How to take Vitamin K2 MK-7 200mcg — Natto-Derived
Take 1 softgel daily with a meal containing fat.
Always read the label. Consult a healthcare professional if you have any medical conditions or take prescription medication.
Quality & transparency
Why form matters
Medibro uses
D3 + K2 (MK-7 form)
Long-acting MK-7
Others often use
D3 alone or K2 as MK-4
Lower bioavailability
MK-7 has a 72-hour half-life vs. MK-4's 1-hour — meaning it's active in your system all week.
K2 directs calcium to bones rather than arteries. Without K2, high-dose D3 can lead to soft-tissue calcium deposits. MK-7 is the clinically preferred form.
How we compare
Medibro vs. typical high-street / marketplace alternatives
| Feature | Medibro | Others |
|---|---|---|
| Ingredient quality | Premium grade | Generic grade |
| Third-party tested | ||
| No unnecessary fillers | ||
| UK manufactured | ||
| 30-day guarantee | ||
| Free UK shipping from £35 |
NHS recommends vitamin D supplementation
The NHS advises everyone in the UK to consider taking 10mcg vitamin D daily, especially from October to March when sunlight is insufficient.
Source: NHS.uk — Vitamin D
Vitamin D3 is more effective with:
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Your personalised stack
Recommended to pair with Vitamin K2
What to expect over time
Blood serum vitamin D starts climbing. Most people don't notice changes yet — this is normal.
Serotonin synthesis improves with adequate D3. Many users notice improved mood and reduced fatigue.
T-cell activation is D3-dependent. Cold and flu resilience measurably improves.
Bone density, cardiovascular and cognitive benefits accumulate. Annual blood test should show 75–200 nmol/L.
⏰ How to take for best results
Best time
With food, once daily
Take with
Water or a meal
Avoid with
No specific interactions — check with your GP if on medication
Consistency is key. Take at the same time each day to build habit and maximise benefit.
Frequently asked questions
Find your perfect supplement stack
Answer 4 quick questions and get a personalised stack built around your goals, health history, and lifestyle.
Medibro Quality Score™
Independent assessmentPurity
92
Overall
out of 100
Potency
Value
How we compare
Medibro | Budget | Pharmacy | |
|---|---|---|---|
3rd-party COA testing | |||
Premium forms (glycinate, KSM-66, TG omega) | |||
Full ingredient transparency | |||
UK pharmacist reviewed | |||
No proprietary blends | |||
30-day money-back guarantee | |||
Eco-friendly packaging |
Comparison reflects general market observations. Specific brands may vary.
What outcomes matter most to you?
Founded by a UK pharmacist
“After 12 years dispensing prescriptions, I was frustrated by the gap between expensive supplements and what the evidence actually supports. Medibro was built to source properly — clinical doses, verified purity, fair prices.”
— MPharm, GPhC registered · Medibro founder
Every formula is reviewed by our in-house pharmacy team before launch.
Stack Synergies
Science-backed pairings for better results
Classic immune duo — Vitamin C and zinc attack pathogens through completely different pathways
Vitamin C is the essential co-factor for collagen synthesis — non-negotiable pairing for skin and joints
Take together to dramatically enhance non-haem iron absorption from food and supplements
Synergies based on published nutritional science. Individual results may vary. Always consult a healthcare professional before combining supplements.
Complete your stack
✨What customers say
From 20 reviews★ 4.8Customers appreciate the effectiveness of K2 in promoting arterial health by directing calcium away from arteries, especially when combined with high doses of vitamin D3. The MK-7 form is praised for its bioavailability and long half-life, allowing for a single daily dose.
Some users noted minor concerns regarding the product's price and availability, with a few wishing for more information on sourcing and production methods.
This product is ideal for individuals taking high doses of vitamin D3 (2,000 IU or more), those concerned about cardiovascular health, and postmenopausal women looking to maintain bone density.
Customer reviews
- ★★★★★Mia J.01/05/2026Good for arterial health
K2 directs calcium away from arteries. With the amount of calcium we absorb from diet and D3 supplementation, K2 is essential insurance.
- ★★★★★Oliver B.21/04/2026Good for arterial health
K2 directs calcium away from arteries. With the amount of calcium we absorb from diet and D3 supplementation, K2 is essential insurance.
- ★★★★☆Grace S.16/04/2026Natto-derived MK-7
Natto-derived MK-7 is the most bioavailable form. This product specifies the source clearly. Good quality.
- ★★★★★Jack N.16/04/2026Good for arterial health
K2 directs calcium away from arteries. With the amount of calcium we absorb from diet and D3 supplementation, K2 is essential insurance.
- ★★★★★Hannah O.16/04/2026MK-7 not MK-4
The MK-7 form has a 24-72 hour half-life versus hours for MK-4. One daily dose is adequate with MK-7. Good product.
- ★★★★★Harry G.15/04/2026Good for arterial health
K2 directs calcium away from arteries. With the amount of calcium we absorb from diet and D3 supplementation, K2 is essential insurance.
- ★★★★★Thomas A.24/03/2026Essential if taking high dose D3
Everyone taking 2,000 IU or more of vitamin D should be taking K2. This 200mcg dose is appropriate and the MK-7 form lasts all day.
- ★★★★★Oliver B.13/03/2026MK-7 not MK-4
The MK-7 form has a 24-72 hour half-life versus hours for MK-4. One daily dose is adequate with MK-7. Good product.
- ★★★★★Oliver B.12/03/2026MK-7 not MK-4
The MK-7 form has a 24-72 hour half-life versus hours for MK-4. One daily dose is adequate with MK-7. Good product.
- ★★★★★Hannah O.09/03/2026MK-7 not MK-4
The MK-7 form has a 24-72 hour half-life versus hours for MK-4. One daily dose is adequate with MK-7. Good product.
- ★★★★★Liam C.25/02/2026Essential if taking high dose D3
Everyone taking 2,000 IU or more of vitamin D should be taking K2. This 200mcg dose is appropriate and the MK-7 form lasts all day.
- ★★★★☆Lily D.19/02/2026Natto-derived MK-7
Natto-derived MK-7 is the most bioavailable form. This product specifies the source clearly. Good quality.
- ★★★★☆Henry I.10/02/2026Natto-derived MK-7
Natto-derived MK-7 is the most bioavailable form. This product specifies the source clearly. Good quality.
- ★★★★★Elizabeth K.02/02/2026Essential companion to D3
If you're taking D3, you should take K2. D3 increases calcium absorption — K2 directs it to bones not arteries. Most people don't know about the K2-calcium connection. 200mcg MK-7 is the correct dose. High quality supplement.
- ★★★★★Grace S.30/01/2026Essential if taking high dose D3
Everyone taking 2,000 IU or more of vitamin D should be taking K2. This 200mcg dose is appropriate and the MK-7 form lasts all day.
- ★★★★★Lily D.29/01/2026Essential if taking high dose D3
Everyone taking 2,000 IU or more of vitamin D should be taking K2. This 200mcg dose is appropriate and the MK-7 form lasts all day.
- ★★★★★Dr. C. B.Verified buyer09/11/2025The bone-artery paradox — K2 solves it
Cardiologist. The calcium paradox (need calcium for bones but calcium causes arterial calcification) is solved by K2-MK7. Matrix Gla Protein (MGP) requires K2 for activation — it diverts calcium from arteries to bones. 200mcg MK-7 is the clinically effective dose.
- ★★★★★Frances P.Verified buyer29/09/2025Post-menopause bone protection
Postmenopausal osteopenia. Rheumatologist added K2-MK7 to my calcium + D3 protocol specifically to prevent arterial calcification. Annual scan showing stable bone density. GP is very pleased with the protocol.
- ★★★★☆Alan H.Verified buyer21/08/2025Cardiovascular health focus
Family history of cardiovascular disease. Cardiologist recommended K2 alongside D3 for its effect on vascular calcification (via MGP). Coronary calcium score improving on serial CT scans. The evidence is increasingly compelling.
- ★★★★☆Gerald F.Verified buyer08/08/2025Dental health improved too
K2 regulates osteocalcin which affects dental mineralisation. Since starting 200mcg K2-MK7 my dentist has noted improved enamel density on my annual check. The bone health effects extend to teeth.
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