Hermetica Superfood Encyclopedia
The Short Answer
Vitamin K2 (MK-7) is a long-lasting form of Vitamin K that directs calcium into your bones and teeth while keeping it out of your arteries, supporting both bone strength and heart health.
CategoryVitamin & Mineral
GroupVitamin
Evidence LevelModerate
Synergy Pairings3
Health Benefits
Enhances bone density by activating osteocalcin, which directs calcium into the bone matrix for mineralization.
Protects cardiovascular health by activating matrix Gla-protein (MGP), inhibiting arterial calcification and maintaining vascular elasticity.
Supports dental health by promoting proper calcium deposition in teeth, contributing to stronger enamel.
Modulates systemic inflammation, potentially supporting joint and metabolic health.
Contributes to cognitive health by influencing calcium regulation in the brain and potentially reducing age-related decline.
Promotes longevity by optimizing calcium metabolism and reducing the risk of age-related vascular stiffening.
Origin & History
Vitamin K2 (Menaquinone-7, MK-7) is a highly bioavailable, long-chain form of Vitamin K2, primarily derived from fermented foods like natto or bacterial synthesis. This essential fat-soluble vitamin plays a critical role in calcium homeostasis, actively directing calcium to bones and teeth while inhibiting its deposition in soft tissues like arteries. It is a cornerstone for supporting optimal bone and cardiovascular health.
“While Vitamin K was discovered in the 20th century, traditional diets, particularly in Japan, have long consumed fermented foods like natto, which are exceptionally rich in Vitamin K2 (MK-7). The health benefits observed in these populations, such as strong bones and cardiovascular health, have been a subject of modern scientific inquiry, validating its traditional dietary role.”Traditional Medicine
Scientific Research
Extensive clinical research, including randomized controlled trials, demonstrates Vitamin K2 (MK-7)'s significant efficacy in improving bone mineral density and reducing fracture risk. Studies also strongly support its role in preventing arterial calcification and improving vascular elasticity, particularly in populations with low intake.
Preparation & Dosage
Supplements
100-200 mcg for adults
Available in capsules or softgels, often combined with Vitamin D3. Typical daily dosages range from .
Dietary Sources
Best obtained from fermented foods like natto, or certain hard and soft cheeses, which contain varying amounts of MK-7.
Timing
Best consumed with a meal containing fats to optimize absorption.
Synergistic Blends
Frequently paired with Vitamin D3, Magnesium, and Calcium for comprehensive bone and cardiovascular support.
Nutritional Profile
- Menaquinone-7 (MK-7): A long-chain menaquinone with high bioavailability and a longer half-life compared to other K2 forms.
- Bioactive Cofactor: Essential for the gamma-carboxylation of Vitamin K-dependent proteins (VKDPs) such as osteocalcin and matrix Gla-protein (MGP).
- Dietary Sources: Primarily found in fermented soybeans (natto) and, to a lesser extent, in certain cheeses and animal products.
- Fat-Soluble: Requires dietary fats for optimal absorption and transport.
Synergy Stack
Hermetica Formulation Heuristic
Vitamin cofactor
Bone & Joint | Cardio & Circulation | Longevity & Anti-Aging
Frequently Asked Questions
What is Vitamin K2 (MK-7)?
Vitamin K2 (MK-7) is a long-chain menaquinone, the most bioavailable form of Vitamin K2, primarily derived from the fermentation of soybeans (natto) by Bacillus subtilis. It has a half-life of approximately 72 hours, allowing it to remain active in the body far longer than other Vitamin K forms, making it highly effective for activating calcium-regulating proteins.
How much Vitamin K2 (MK-7) should I take daily?
Most clinical studies use dosages of 100-200 mcg/day for bone and cardiovascular health. The landmark 3-year Knapen et al. (2015) trial used 180 mcg/day and demonstrated significant improvements in bone mineral density and arterial elasticity. It is best taken with a fat-containing meal and is commonly paired with Vitamin D3 for synergistic effects.
How is MK-7 different from MK-4?
MK-7 has a significantly longer half-life (~72 hours) compared to MK-4 (~2-4 hours), meaning it maintains effective blood levels throughout the day with a single dose. MK-4 requires much higher doses (15-45 mg/day) and multiple daily administrations to achieve therapeutic effects. MK-7 is generally considered more practical and cost-effective for long-term supplementation.
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