Hermetica Superfood Encyclopedia
The Short Answer
Vitamin K2 MK-7 (menaquinone-7) activates vitamin K-dependent proteins like osteocalcin and matrix Gla protein through gamma-carboxylation. This mechanism supports bone mineralization and prevents arterial calcification more effectively than other vitamin K forms.
CategoryVitamin & Mineral
GroupVitamin K
Evidence LevelStrong
Primary KeywordVitamin K2 MK-7 benefits
Synergy Pairings5
Vitamin K2 MK-7 (MenaQ7) — botanical close-up
Health Benefits
Supports bone health by activating proteins that bind calcium, reducing fracture risk by up to 25%. - Enhances cardiovascular health by preventing arterial calcification, which is crucial for maintaining heart function. - Improves dental health by supporting bone density in the jaw, which is vital for strong teeth. - Supports brain health by reducing oxidative stress, potentially lowering the risk of neurodegenerative diseases. - Aids in blood sugar regulation by improving insulin sensitivity, which can help manage diabetes risk. - Promotes healthy aging by reducing inflammation, a key factor in age-related diseases. - Supports joint health by reducing inflammation, which can alleviate symptoms of arthritis.
Origin & History
Natural habitat
Vitamin K2 MK-7 is a form of vitamin K2 produced through fermentation of soybeans using Bacillus subtilis natto. It is known for its long half-life and bioavailability.
“Vitamin K2, particularly MK-7, is found in natto, a traditional Japanese food, and has been consumed for its health benefits for centuries.”Traditional Medicine
Scientific Research
RCTs and meta-analyses support the role of MK-7 in improving bone mineral density and reducing arterial stiffness. It is considered more effective than other forms of vitamin K.
Preparation & Dosage
Traditional preparation
Typical dosages range from 90 to 120 mcg per day. Consult a healthcare provider before use.
Nutritional Profile
How It Works
Mechanism of Action
MK-7 serves as a cofactor for gamma-glutamyl carboxylase, which converts glutamic acid residues to gamma-carboxyglutamic acid in vitamin K-dependent proteins. This activates osteocalcin for calcium binding in bones and matrix Gla protein (MGP) to prevent calcium deposits in arteries. MK-7's longer half-life (72 hours) provides superior bioavailability compared to MK-4 and K1.
Clinical Evidence
A 3-year randomized controlled trial of 244 postmenopausal women found 180 mcg daily MK-7 reduced bone mineral density loss and improved bone strength by 25%. Cardiovascular studies show MK-7 supplementation (180-360 mcg daily) reduces arterial stiffness by 6-12% over 12 weeks. Meta-analyses indicate moderate evidence for bone benefits but limited long-term cardiovascular data. Most studies use the patented MenaQ7 form with consistent bioavailability.
Safety & Interactions
MK-7 is generally well-tolerated with no serious adverse effects reported in clinical trials up to 360 mcg daily. It may enhance warfarin's anticoagulant effects, requiring INR monitoring in patients taking blood thinners. Mild gastrointestinal symptoms occur in less than 5% of users. Safety during pregnancy and lactation is not established, though no teratogenic effects are known.
Synergy Stack
Hermetica Formulation Heuristic
Frequently Asked Questions
What is the optimal dosage of Vitamin K2 MK-7?
Clinical studies support 180-200 mcg daily for bone health and cardiovascular benefits. The patented MenaQ7 form has the most research backing at this dosage range.
How long does it take for Vitamin K2 MK-7 to work?
Improvements in undercarboxylated osteocalcin levels occur within 2-6 weeks. Bone density and cardiovascular benefits typically require 3-6 months of consistent supplementation.
Can I take Vitamin K2 MK-7 with blood thinners?
MK-7 may interfere with warfarin effectiveness by promoting clotting factors. Consult your doctor for INR monitoring if taking anticoagulant medications.
What foods contain Vitamin K2 MK-7?
Natto (fermented soybeans) contains the highest levels at 775 mcg per 100g. Fermented cheeses and kefir provide smaller amounts (10-30 mcg per serving).
Is MenaQ7 better than other Vitamin K2 forms?
MenaQ7 has superior bioavailability and longer half-life than MK-4, requiring once-daily dosing. It's the most clinically studied form with consistent potency and stability.
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