Many people are unaware that there is a vitamin just as vital as vitamin D, yet it rarely receives attention. Most adults do not maintain sufficient levels simply because they have never heard of it or do not know how to increase their intake.

That vitamin is vitamin K.

What Is Vitamin K?

Vitamin K is a fat-soluble vitamin best known for its essential role in normal blood clotting. It also contributes to strong bones, supports cardiovascular health, and participates in several other bodily functions. Experts suggest that a large portion of the population may not meet the recommended levels, especially through diet alone.

Possible Problems Linked to Low Vitamin K

Insufficient vitamin K has been associated with:

• Arterial calcification
• Cardiovascular issues
• Varicose veins
• Cognitive decline
• Osteoporosis
• Dental problems
• Certain types of cаncer, including:
  • Prostate
  • Lung
  • Liver
  • Leukemia
• Increased susceptibility to infections

Types of Vitamin K

There are three main forms of vitamin K:

Vitamin K1

Found naturally in plants, especially leafy greens. It primarily supports liver function and healthy blood clotting.

Vitamin K2

Produced by beneficial bacteria in the digestive tract and found in certain foods. K2 is delivered to bones, blood vessels, and tissues outside the liver, making it extremely valuable.

Vitamin K3

A synthetic version. This form is not recommended, and it may be unsafe for infants.

Most nutritional experts consider vitamin K2 the most useful form, as it is naturally produced and well tolerated by the body.

Food Sources of Vitamin K2

Foods rich in K2 include:

• Fermented foods
• Dark leafy vegetables
• Natto
• Raw dairy
• Whole-egg mayonnaise
• Chicken
• Dark turkey meat
• Lamb
• Duck
• Beef liver
• Miso

More About Vitamin K2

Bone Strength

A number of studies in Japan suggest that vitamin K2 can help maintain bone mass. K2 acts like a biological “glue,” helping calcium and other minerals bind properly into the bone matrix.

Research and C*ncer

Some studies have explored how vitamins K1 and K2 may influence cаncer cell growth.
For instance, a publication in the International Journal of Oncology noted that K2 may slow the growth of lung cаncer cells, and earlier research examined possible benefits for leukemia as well.

Absorption

Because vitamin K is fat-soluble, it must be consumed with dietary fat to be absorbed efficiently. Healthy fats such as olive oil, eggs, or avocado can improve absorption.

Who May Need More Vitamin K?

Vitamin K may be beneficial for people who:

• Have osteoporosis or heart concerns
• Rarely eat vegetables
• Follow restrictive diets
• Have digestive conditions such as Crohn’s, ulcerative colitis, celiac disease, or liver disorders
• Take cholesterol-lowering drugs, aspirin, or long-term antibiotics

How Much Do You Need?

General recommendations for adults range from 44 to 185 mcg per day.
Those taking medication, especially blood thinners, should speak with a healthcare provider before increasing their intake. A commonly suggested safe amount is up to 150 mcg daily.

Important Precaution

Pregnant or breastfeeding women should keep supplemental vitamin K2 below 65 mcg per day, unless otherwise advised by a professional.

Additional Possible Benefits

• Vitamin K2 may support brain health and has been investigated for its role in cognitive disorders.
• It may contribute to improved insulin sensitivity.
• Topical vitamin K creams are sometimes used to help reduce bruising.
• Vitamin K may have antioxidant activity.