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
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
Vitamin K2 MK-7 (MenaQ7) is a bioactive form of menaquinone-7, a fat-soluble vitamin with no caloric macronutrient contribution. Active compound: menaquinone-7 (MK-7) at typical supplemental doses of 45–360 mcg per serving, with 100–200 mcg being the most clinically studied range. MenaQ7 is a patented, natural-source MK-7 derived from fermented chickpeas (Cicer arietinum) via Bacillus subtilis natto fermentation. Key bioactive compound: all-trans MK-7 isomer, which is the biologically active configuration; MenaQ7 standardizes for >97% all-trans content, distinguishing it from synthetic K2 sources that may contain inactive cis-isomers. Molecular weight: 649.0 g/mol. No protein, carbohydrate, fiber, or fat content inherent to the isolated ingredient itself. Micronutrient classification: fat-soluble vitamin (K family). Bioavailability notes: MK-7 has significantly superior bioavailability compared to MK-4 and vitamin K1 (phylloquinone) due to its longer side chain (7 isoprene units), resulting in a plasma half-life of approximately 72 hours versus 1–2 hours for K1. Absorption requires dietary fat co-ingestion; peak plasma concentration reached within 4–6 hours post-ingestion. MenaQ7 specifically demonstrates consistent carboxylation of osteocalcin and Matrix Gla Protein (MGP) at doses as low as 90 mcg/day. Serum binding occurs primarily via LDL and HDL lipoproteins. No known interference with warfarin at doses below 50 mcg in most individuals, though caution is advised.
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
Also Known As
Menaquinone-7MK-7MenaQ7Vitamin K2 (MK-7)Menaquinone 72-methyl-3-[(2E,6E,10E,14E,18E,22E)-3,7,11,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaen-1-yl]-1,4-naphthoquinoneNatto vitaminLong-chain menaquinone
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.
Is Vitamin K2 MK-7 safe during pregnancy and breastfeeding?
Vitamin K2 MK-7 is generally considered safe during pregnancy and breastfeeding at dietary levels, as it plays a crucial role in fetal bone development and is naturally present in breast milk. However, pregnant women should consult their healthcare provider before starting supplementation, particularly if they are on anticoagulant medications, to ensure proper dosing and avoid potential interactions. Most prenatal formulations include vitamin K, reflecting its importance during this period.
Does Vitamin K2 MK-7 interact with common medications besides blood thinners?
Beyond anticoagulants, Vitamin K2 MK-7 may interact with certain antibiotics (particularly those that disrupt gut bacteria) and bisphosphonates used for osteoporosis, though these interactions are generally not severe. Some medications that reduce fat absorption can impair K2 MK-7 absorption, since it is fat-soluble. It's advisable to inform your doctor about K2 supplementation if you take medications for bone health or chronic conditions.
What clinical research evidence supports Vitamin K2 MK-7 for bone and cardiovascular health?
Multiple clinical trials, including the Rotterdam Study and Japanese research, demonstrate that Vitamin K2 MK-7 (MenaQ7) significantly reduces arterial calcification and improves bone mineral density, with some studies showing up to 25% reduction in fracture risk over 3 years. Research shows MK-7 activates osteocalcin and matrix Gla protein, the two primary calcium-regulating proteins in bone and arteries, with bioavailability superior to other K2 forms. However, most long-term cardiovascular outcome studies are still ongoing, making bone health the most strongly established benefit.
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