Vitamin K2 MK-7 200mcg — Natto-Derived
200mcg MK-7 vitamin K2 — fermented natto-derived. Supports bone mineral density and cardiovascular health.
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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
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✨What customers say
From 20 reviews★ 4.8Customers appreciate the effectiveness of K2 in directing calcium away from arteries, particularly valuing its role in supporting arterial and bone health, especially when taken alongside high doses of vitamin D3.
Some minor complaints include a desire for clearer dosage instructions and occasional concerns about the taste or form of the supplement.
This product is best for individuals taking high doses of vitamin D3, those concerned about cardiovascular health, and postmenopausal women looking to maintain bone density.
Customer reviews
- ★★★★★Mia J.14/05/2026Good 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.05/05/2026Good 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.
- ★★★★☆Grace S.30/04/2026Natto-derived MK-7
Natto-derived MK-7 is the most bioavailable form. This product specifies the source clearly. Good quality.
- ★★★★★Hannah O.29/04/2026MK-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.
- ★★★★★Jack N.29/04/2026Good 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.
- ★★★★★Harry G.28/04/2026Good 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.06/04/2026Essential 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.27/03/2026MK-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.26/03/2026MK-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.23/03/2026MK-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.11/03/2026Essential 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.
- ★★★★☆Lily D.04/03/2026Natto-derived MK-7
Natto-derived MK-7 is the most bioavailable form. This product specifies the source clearly. Good quality.
- ★★★★☆Henry I.24/02/2026Natto-derived MK-7
Natto-derived MK-7 is the most bioavailable form. This product specifies the source clearly. Good quality.
- ★★★★★Elizabeth K.16/02/2026Essential 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.13/02/2026Essential 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.12/02/2026Essential 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.
- ★★★★★Dr. C. B.Verified buyer23/11/2025The 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 buyer13/10/2025Post-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 buyer04/09/2025Cardiovascular 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 buyer22/08/2025Dental 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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