freshly sliced mozzarella cheese to represent vitamin K2

Disclaimer: This article is for informational purposes only and is not intended to diagnose any conditions. LifeDNA does not provide diagnostic services for any conditions mentioned in this or any other article. 

Vitamin K2 plays a crucial role in bone health, cardiovascular function, and overall well-being. While it is well known that diet and lifestyle can influence Vitamin K2 levels, recent research suggests that your genetics might also play a significant role in how your body processes and utilizes this essential nutrient. Understanding the genetic factors that affect Vitamin K2 could help you personalize your wellness approach, optimizing your intake for the best outcomes. 

What is Vitamin K2?

Vitamin K2 (VitK2), along with Vitamin K1 (VitK1), plays a critical role in human health. While Vitamin K1 is found in green leafy plants and algae, Vitamin K2 is derived from animal products and fermented foods. 

Vitamin K2, or menaquinone, is a fat-soluble vitamin essential for various physiological functions, including blood clotting, bone metabolism, and cardiovascular health. Unlike vitamin K1, which is primarily found in leafy greens, vitamin K2 is predominantly sourced from animal products and fermented foods. Additionally, certain bacteria in the human gut can synthesize vitamin K2, contributing to its levels in the body. 

In the realm of genetics, individual genetic variations can influence the body’s ability to utilize and metabolize vitamin K2. For instance, certain genetic variants may affect the activity of enzymes involved in vitamin K metabolism, potentially altering its effectiveness in the body. 

Understanding these genetic factors is crucial for tailoring personalized health strategies, as they can impact an individual’s nutritional needs and predispositions to conditions like osteoporosis or cardiovascular diseases. 

Vitamin K2 is vital for maintaining optimal health, and genetic factors can significantly influence its metabolism and effectiveness in the body. Recognizing these genetic influences allows for more personalized approaches to nutrition and health management.

Where Is Vitamin K2 Found?

Vitamin K2, or menaquinone, is a fat-soluble vitamin essential for various physiological functions, including blood clotting, bone metabolism, and cardiovascular health. Unlike vitamin K1, which is primarily found in leafy greens, vitamin K2 is predominantly sourced from animal products and fermented foods

Animal Products

  • Egg Yolks: Egg yolks are a notable source of vitamin K2, providing approximately 32 micrograms per 100 grams.
    Liver: Organ meats, particularly chicken liver, are rich in vitamin K2, offering about 12.6 micrograms per 100 grams.
  • Cheeses: Hard cheeses, such as cheddar, contain significant amounts of vitamin K2, with levels varying depending on the type and fermentation process.

Fermented Foods

  • Natto: A traditional Japanese dish made from fermented soybeans, nattō is exceptionally high in vitamin K2 with approximately 1,034 micrograms per 100 grams.
  • Sauerkraut: Fermented cabbage, known as sauerkraut, contains vitamin K2, though in lower amounts compared to other fermented foods.

Dairy Products

  • Milk and Yogurt: Whole milk and yogurt provide modest amounts of vitamin K2, with levels around 0.9 micrograms per 100 grams. 

Meats

  • Poultry: Chicken and other poultry products contain vitamin K2, with chicken providing about 8.9 micrograms per 100 grams. 

It is important to note that the vitamin K2 content in these foods can vary based on factors such as the animal’s diet, the fermentation process, and food preparation methods. Incorporating a variety of these sources into the diet can help ensure adequate vitamin K2 intake.

Effect of Genetics on Vitamin K2 Levels and Function

Recent studies suggest Vitamin K2 is far more than just a blood clotting agent; it has implications for bone health, heart health, energy metabolism, and even neuroprotection. Other roles involve mitochondrial function. Vitamin K2  influences the electron transport chain within mitochondria, aiding in energy production and cell survival.

Variants in genes associated with mitochondrial respiratory function, such as those coding for electron transport chain components, could alter how efficiently Vitamin K2 contributes to this energy release.

Though promising, these genetic insights remain preliminary. There is still a need for more robust studies to confirm the exact biological pathways and genetic interactions that govern Vitamin K2’s role in human health. 

Research studies have highlighted several potential genetic variant candidates that may impact Vitamin K levels and how Vitamin K2 works in the body. Vitamin K-dependent proteins (VKDPs), such as osteocalcin (OC), matrix Gla-protein (MGP), and Gas6, are regulated by Vitamin K2 and play essential roles in processes like calcium distribution, bone formation, and arterial health. Genetic variants in the genes encoding these proteins could influence their activation and effectiveness.

For example, mutations or polymorphisms in the GGCX gene, which codes for gamma-glutamyl carboxylase (an enzyme critical for activating VKDPs), and the VKORC1 (vitamin K epoxide reductase) may affect how the body processes Vitamin K2. However, the genetic factors influencing Vitamin K2 levels and activity remain an emerging field of study.

Understanding these biological and genetic connections could lead to personalized strategies to optimize Vitamin K2 intake based on the genetic makeup, enhancing its benefits for conditions like osteoporosis, cardiovascular disease, and even neurodegeneration. Maintaining a diet rich in Vitamin K2 and considering supplementation when appropriate are practical steps to support its numerous health benefits.

Learn more about how your genetics can affect your Vitamin K and other vitamin and mineral levels in the LifeDNA Supplements Report.

Environmental Factors That May Affect Vitamin K2 Levels

Vitamin K2, or menaquinone, is a fat-soluble vitamin essential for various physiological functions, including blood clotting, bone metabolism, and cardiovascular health. While genetic factors significantly influence vitamin K2 levels, lifestyle and environmental factors also play a crucial role. Understanding these factors can help individuals optimize their vitamin K2 intake and overall health.

Dietary Intake

The primary source of vitamin K2 is dietary intake, particularly from animal products and fermented foods. A diet rich in these foods ensures adequate vitamin K2 levels. Conversely, a diet low in these sources can lead to deficiencies. For instance, fermented foods like natto are exceptionally high in vitamin K2, while processed foods may lack this nutrient. 

Gut Microbiota

The gut microbiota plays a significant role in synthesizing vitamin K2. A healthy and diverse gut microbiome can produce sufficient amounts of vitamin K2, whereas dysbiosis (an imbalance in gut bacteria) may impair its synthesis. Factors such as antibiotic use, poor diet, and stress can disrupt gut microbiota balance, potentially affecting vitamin K2 levels. 

Age

Age-related changes can influence vitamin K2 levels. As individuals age, the efficiency of vitamin K2 absorption and utilization may decline, increasing the risk of deficiency. Older adults may also have altered gut microbiota composition, affecting vitamin K2 synthesis. 

Medications

Certain medications can interfere with vitamin K2 metabolism. For example, antibiotics can disrupt gut microbiota, reducing vitamin K2 synthesis. Additionally, medications like warfarin, used as blood thinners, can affect vitamin K metabolism and function, necessitating careful monitoring of vitamin K2 intake. 

Environmental Exposures

Exposure to environmental stressors such as pollution, industrial farming practices, and residues of pesticides and fertilizers can impact vitamin K2 levels. These factors may affect the quality of food sources otherwise rich in vitamin K2, thereby influencing dietary intake. 

Lifestyle Factors

Lifestyle choices, including smoking and alcohol consumption, can negatively affect vitamin K2 levels. Smoking may impair vitamin K2 metabolism, while excessive alcohol intake can disrupt liver function, affecting vitamin K2 synthesis and utilization. 

Sunlight Exposure

While vitamin D is synthesized through skin exposure to sunlight, vitamin K2 synthesis is not directly influenced by sunlight. However, adequate vitamin D levels are essential for optimal vitamin K2 function, as they work synergistically in bone metabolism. 

Environmental factors such as dietary intake, gut microbiota health, age, medication use, environmental exposures, lifestyle choices, and sunlight exposure can significantly influence vitamin K2 levels in the body. Being aware of these factors allows individuals to make informed decisions to maintain optimal vitamin K2 status and overall health.

What is the Recommended Daily Dose of Vitamin K2?

While there is no specific recommended daily intake for vitamin K2, understanding the general guidelines for vitamin K intake can help individuals ensure adequate levels of this essential nutrient.

Recommended Daily Intake

Health authorities have established recommended daily intakes for vitamin K, encompassing both vitamin K1 and K2. The National Institutes of Health (NIH) recommends the following daily intakes:

  • Adult Men: 120 micrograms (mcg)
  • Adult Women: 90 mcg

These recommendations are based on the total vitamin K intake required to maintain normal blood clotting. Individuals on anticoagulant medications, such as warfarin, should consult with healthcare providers before making significant changes to vitamin K intake, as vitamin K can interfere with these medications. 

Specific recommendations for vitamin K2 intake are not established but ensuring an adequate total vitamin K intake through a balanced diet rich in vitamin K1 and K2 sources is essential for maintaining optimal health.

What Are the Symptoms of Vitamin K2 Deficiency?

Vitamin K2, a fat-soluble vitamin, plays a crucial role in blood clotting, bone metabolism, and cardiovascular health. While vitamin K1 is primarily involved in blood clotting, vitamin K2 contributes to bone health and arterial function. A deficiency in vitamin K2 can lead to several health issues.

Symptoms of Vitamin K2 Deficiency

  1. Excessive Bleeding: A primary symptom of vitamin K2 deficiency is excessive bleeding. Individuals may experience easy bruising, nosebleeds, and prolonged bleeding from minor cuts or injuries. In severe cases, internal bleeding can occur, leading to blood in the urine or stool.
  2. Bone Health Issues: Vitamin K2 is essential for bone metabolism. A deficiency can result in weakened bones, increasing the risk of fractures. This is due to vitamin K2’s role in activating osteocalcin, a protein that helps bind calcium to the bone matrix.
  3. Cardiovascular Problems: Vitamin K2 helps prevent arterial calcification by activating matrix Gla-protein (MGP), which inhibits the deposition of calcium in the arteries. A deficiency may contribute to arterial stiffness and an increased risk of cardiovascular diseases.
  4. Skin Manifestations: In infants, vitamin K2 deficiency can lead to skin symptoms such as bruising, especially around the head or face. This is a sign of internal bleeding and requires immediate medical attention.
  5. Fatigue and Weakness: While not as common, some individuals with vitamin K2 deficiency may experience general fatigue and muscle weakness, potentially due to its role in mitochondrial energy metabolism.

It’s important to note that vitamin K2 deficiency is relatively rare in healthy adults, as the body typically obtains sufficient amounts from dietary sources and gut bacteria. However, certain conditions can increase the risk of deficiency, including:

  • Malabsorption Disorders: Conditions such as celiac disease, cystic fibrosis, and other gastrointestinal disorders can impair the absorption of fat-soluble vitamins like vitamin K2.
  • Long-Term Antibiotic Use: Extended use of antibiotics can disrupt the gut microbiota, reducing the synthesis of vitamin K2 by beneficial bacteria.
  • Liver Disease: Vitamin K2 is involved in the synthesis of clotting factors in the liver, but liver disorders can impair its function, leading to bleeding complications.

If you experience symptoms suggestive of vitamin K2 deficiency, it’s essential to consult a healthcare professional for proper evaluation and management. Early detection and treatment can help prevent complications associated with this deficiency.

What are the Benefits of Taking Vitamin K2?

  1. Bone Health: Vitamin K2 is essential for bone metabolism. It activates osteocalcin, a protein that binds calcium to the bone matrix, enhancing bone strength and density. Studies have shown that vitamin K2 supplementation can improve bone mineralization and reduce the risk of fractures.
  2. Cardiovascular Health: Vitamin K2 helps prevent arterial calcification by activating matrix Gla-protein (MGP), which inhibits the deposition of calcium in the arteries. This action contributes to arterial flexibility and reduces the risk of cardiovascular diseases. Research indicates that higher dietary intake of vitamin K2 is associated with a lower risk of heart disease.
  3. Blood Clotting: Vitamin K2 plays a role in blood clotting by activating proteins involved in coagulation. While vitamin K1 is primarily responsible for this function, vitamin K2 also contributes to the process, ensuring proper wound healing and prevention of excessive bleeding.
  4. Skin Health: Vitamin K2 contributes to skin health by supporting the synthesis of proteins involved in skin elasticity and repair. Adequate levels of vitamin K2 may help maintain skin integrity and reduce the appearance of wrinkles.
  5. Brain Function: Vitamin K2 is involved in the synthesis of sphingolipids, essential components of brain cell membranes. Adequate vitamin K2 levels may support cognitive function and protect against neurodegenerative diseases.
  6. Glucose Metabolism: Vitamin K2 may play a role in glucose metabolism by influencing insulin sensitivity. Some studies suggest that vitamin K2 supplementation could improve insulin sensitivity and reduce the risk of type 2 diabetes.

Vitamin K2 is a vital nutrient with multiple health benefits, via its roles in supporting bone and cardiovascular health, aiding in blood clotting, promoting skin health, enhancing brain function, and potentially improving glucose metabolism. Ensuring adequate intake of vitamin K2 through diet or supplementation can contribute to overall well-being.

Ways to Maintain Optimum Vitamin K2 Levels

Maintaining optimal vitamin K2 levels is essential for bone health, cardiovascular well-being, and overall body functions. Unlike vitamin K1, which is primarily involved in blood clotting, vitamin K2 plays a significant role in bone metabolism and arterial health. 

Dietary Intake

Incorporating vitamin K2-rich foods into the diet is a natural and effective way to maintain adequate levels. Key sources include:

  • Fermented Foods: Natto, a traditional Japanese dish made from fermented soybeans, is exceptionally high in vitamin K2. Other fermented foods like sauerkraut also contribute to vitamin K2 intake.
  • Animal Products: Egg yolks, chicken liver, and other organ meats are good sources of vitamin K2. However, it’s advisable to consume these in moderation due to their high cholesterol content.
  • Dairy Products: Certain cheeses, such as Gouda, Cheddar, and blue cheese, contain vitamin K2. While they offer nutritional benefits, they should be consumed in moderation due to their high saturated fat and sodium content.

Gut Health

The body can synthesize vitamin K2 through the gut microbiota. Maintaining a healthy gut flora supports this natural production. Consuming probiotics and prebiotics can enhance gut health, thereby potentially increasing vitamin K2 synthesis. 

Supplementation

For individuals at risk of deficiency or those with specific health conditions, vitamin K2 supplementation may be beneficial. The recommended daily intake varies, but some studies suggest a range of 100 to 300 micrograms per day. It’s important to consult with a healthcare provider before starting supplementation, especially for individuals on anticoagulant medications, as vitamin K can interact with these drugs. 

Lifestyle Factors

Certain lifestyle factors can influence vitamin K2 levels:

  • Smoking: Smoking may impair vitamin K metabolism, potentially leading to lower levels.
  • Alcohol Consumption: Excessive alcohol intake can disrupt vitamin K absorption and metabolism.

Adopting a healthy lifestyle that includes a balanced diet, regular exercise, and avoiding smoking and excessive alcohol consumption can support optimal vitamin K2 levels. Maintaining optimal vitamin K2 levels involves a combination of dietary choices, supporting gut health, considering supplementation when necessary, and adopting a healthy lifestyle. Given the vitamin’s role in bone and cardiovascular health, ensuring adequate intake is crucial for overall well-being.

Summary

  • Vitamin K2 is crucial for bone health, cardiovascular function, and overall well-being, and recent research suggests genetics may influence how the body responds to it.
  • Genetic variations may affect enzyme activity involved in Vitamin K2 metabolism, influencing its effectiveness and how the body processes and uses it.
  • Vitamin K2 is mainly found in animal products and fermented foods, such as egg yolks, liver, cheese, and natto.
  • Genetic variants in proteins like osteocalcin and matrix Gla-protein (MGP), which are regulated by Vitamin K2, may also affect these proteins’ activation and role in calcium distribution, bone formation, and arterial health.
  • Vitamin K2 may also impact mitochondrial function, influencing energy metabolism and cell survival, with genetic variants affecting this process as well.
  • Research on the biological and genetic influences of Vitamin K2 is still ongoing, and more studies are needed to understand the exact pathways involved.
  • Environmental factors, such as diet, gut microbiota, age, medications, and lifestyle choices, can also impact Vitamin K2 levels in the body.
  • A diet rich in Vitamin K2 from food sources or supplementation can help ensure optimal levels, particularly for those at risk of deficiency.

References

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