The hidden cardiovascular risks of insufficient vitamin K and folate intake

As American Heart Month 2026 approaches with a focus on vascular aging, prevention, and long-term cardiovascular resilience, emerging science underscores the critical role of addressing nutritional deficiencies. Specifically, research highlights the potential benefits of combining key nutrients through supplementation to support heart health.

The Growing Concern of Nutritional Gaps

Cardiovascular issues can begin developing as early as a person’s 20s and progress with age, often linked to insufficient intake of essential vitamins. Vitamins K and B9 (folate) have been identified as particularly important for maintaining healthy heart function. Clinicians at the Cleveland Clinic Foundation have noted an “alarmingly high prevalence of vitamin K deficiency and suboptimal recommended intake” among the US population [1].

Current research suggests that adequate intake of vitamin K, especially vitamin K2, may be crucial for protecting both arteries and bones. Approximately 54% of the global population does not consume enough folate through diet alone [2]. A 2025 study revealed that nearly 73% of women of reproductive age have folate levels below those considered necessary to prevent neural tube defects [3], and are therefore potentially missing out on folate’s cardio-protective benefits.

The Impact of Deficiencies

Both vitamin K2 and folate have been consistently linked to positive health outcomes, extending beyond heart health to include bone health and fertility. However, obtaining sufficient amounts of these vitamins through diet alone can be challenging, according to Lacey Hall, MS, RD, Head of Medical Affairs with Gnosis by Lesaffre. She observes that convenience often takes priority, leading to low levels of key nutrients, making supplementation an increasingly attractive option.

Vitamin K2 protects heart health by regulating calcium deposition, preventing it from accumulating in arteries and soft tissues. Folate, meanwhile, supports vascular function through homocysteine metabolism, and a woman’s pregnancy outcomes can serve as an early indicator of future cardiovascular risk [5]. Hall explains that suboptimal intake of these vitamins “may contribute to increased cardiovascular risk by increasing arterial calcification, vascular stiffness, impaired homocysteine metabolism, and endothelial dysfunction.”

Targeting Cardiovascular Health with Key Nutrients

While calcium is vital for bone health, its buildup in blood vessels can be detrimental to the cardiovascular system. Vitamin K2 plays a role in controlling this process by activating a protein that inhibits vascular calcification. Low vitamin K levels are associated with arterial stiffness, calcification, heart failure, and cardiovascular mortality. Higher vitamin K2 intake has been linked to improved arterial health and a reduced risk of coronary heart disease – each additional 10 mcg of vitamin K2 (MK-7, MK-8, MK-9) is associated with a 9% lower risk [6, 7].

MenaQ7® K2 as MK-7 is a clinically validated form of vitamin K2, backed by nearly two decades of research. Studies show that long-term supplementation with MK-7 can improve vascular elasticity [8, 9] and support healthy blood pressure, particularly in postmenopausal women [10]. Preliminary results from the VitaK CAC trial indicate that two years of MenaQ7 supplementation significantly slowed coronary artery calcification compared to a placebo [11].

Folate’s cardiovascular benefits are linked to its role in homocysteine metabolism and endothelial function. Recent studies consistently demonstrate that higher folate intake is associated with lower cardiovascular and all-cause mortality, especially in those with metabolic vulnerabilities [12, 13]. An increase in folate intake is associated with a 5% lower risk of total CVD events and a 10% lower risk of CVD mortality [14].

However, the commonly consumed form of vitamin B9, folic acid, requires conversion to its active form, 5-MTHF. Approximately 40% of the population has an enzyme deficiency that hinders this conversion. Quatrefolic® active folate is a well-studied alternative, demonstrating benefits for women’s health, folate metabolism [15, 16], cardiovascular health [17], and fertility [18].

A Synergistic Approach

Vitamin K2 (MenaQ7®) and active folate (Quatrefolic®) work together to address key cardiovascular pathways:

• Calcium regulation: Vitamin K2 activates a protein that inhibits arterial calcium deposition while supporting bone mineralization.
• Methylation and endothelial support: active folate supports healthy homocysteine metabolism and vascular health.

Both ingredients have been extensively studied and shown to have positive effects on heart health. This combination of fat-soluble K2 and water-soluble active folate offers a science-driven approach to vascular aging, prevention, and long-term cardiovascular resilience.

Frequently Asked Questions

What is the role of vitamin K2 in heart health?

Vitamin K2 helps regulate calcium deposition, preventing it from accumulating in arteries and soft tissues, which can contribute to cardiovascular disease.

Why is folate important for cardiovascular health?

Folate supports vascular function through homocysteine metabolism and has been linked to lower cardiovascular and all-cause mortality in several studies.

Is folic acid the same as folate?

No, folic acid is a synthetic form of vitamin B9 that requires conversion to its active form, 5-MTHF. Some individuals have difficulty with this conversion, making Quatrefolic® active folate a potentially more effective option.

Considering the widespread prevalence of nutritional deficiencies, how might proactive supplementation play a role in supporting long-term cardiovascular health?