Could This Underrated Vitamin Help Lower BP After Menopause?
For postmenopausal women, the end of estrogen’s protective effect can mark the beginning of a long, uphill climb when it comes to heart health.
Blood pressure creeps up, arteries stiffen, and the risk of cardiovascular disease skyrockets. But a little-known nutrient might be able to tip the scales back in your favor.
Vitamin K2—specifically in its MK-7 form—has been gaining attention for its role in bone and heart health.
And now, a new post-hoc analysis suggests this underappreciated vitamin could also help lower blood pressure and improve vascular function in postmenopausal women.
Most women aren’t warned about the cardiovascular consequences of menopause.
As estrogen levels drop, vascular stiffness increases. That means your arteries lose their ability to expand and contract, which can send your blood pressure soaring and place added strain on your heart.
In this newly published analysis, researchers looked back at data from a one-year clinical study involving 165 women with low vitamin K levels. Among these women, those who had already gone through menopause experienced a meaningful improvement in vascular flexibility after supplementing with vitamin K2 (as menaquinone-7, or MK-7).
But the real breakthrough came when researchers took it one step further.
They divided the postmenopausal group by their baseline stiffness levels.
Those with the stiffest arteries at the start of the study showed the most benefit: not only did their arteries become more flexible, but their systolic blood pressure in the brachial and carotid arteries also dropped.
Meanwhile, women in the placebo group experienced the opposite effect—arterial stiffness and blood pressure increased over the course of the year.
You may be wondering, how can a vitamin known for blood clotting in the liver be involved in heart health?
The answer lies in vitamin K2’s unique ability to activate matrix Gla protein (MGP), a powerful inhibitor of vascular calcification. Without enough K2, calcium that should go to your bones can end up in your arteries instead—causing them to harden over time.
This calcification is a major contributor to arterial stiffness and high blood pressure, especially in aging adults.
Prior studies—including a 3-year trial published in 2015—have already linked daily MK-7 supplementation to reduced arterial stiffness. But this new analysis is the first to focus specifically on postmenopausal women, a group often left out of cardiovascular research.
One of the most exciting aspects of this new study is that not all participants responded the same way—and that’s a good thing.
The most dramatic improvements were seen in women who had the highest vascular stiffness at baseline, suggesting that MK-7 could be most effective as a targeted intervention.
As Dr. Katarzyna Maresz, one of the authors, explains, “The main findings underscore that menopause negatively affects vascular health, yet vitamin K2 as MK-7 supplementation can mitigate these effects.”
For women nearing or going through menopause, this presents a new avenue for personalized care—especially for those with a known risk for high blood pressure or arterial stiffening.
This latest analysis adds another compelling layer to the growing body of evidence supporting vitamin K2’s role in cardiovascular health.
While it’s not a magic bullet, MK-7 may be a low-risk, high-reward strategy—especially for postmenopausal women who aren’t yet seeing significant improvements through diet or exercise alone.
As always, talk with your healthcare provider before starting any new supplement, especially if you’re on medications that affect clotting or blood pressure.
But if your blood vessels are feeling the toll of time—or menopause—vitamin K2 might just be the missing piece.
To natural BP management,
Rachel Mace
Managing Editorial Director, e-Alert
with contributions from the research team
P.S. Are sleep and blood pressure aging your brain faster?
Sources:
Vitamin K2 May Promote Healthy Blood Pressure in Postmenopausal Women. (2025, May 8). Nutraceuticals World. https://www.nutraceuticalsworld.com/breaking-news/vitamin-k2-may-promote-healthy-blood-pressure-in-postmenopausal-women/
