Is arterial stiffness reversible?

Functional stiffness from vascular tone responds within weeks to exercise and nitrates. Structural stiffness from calcification and collagen crosslinking is far more resistant.

Does vitamin K2 really slow calcification?

A three-year randomised trial of MK-7 180 mcg/day in healthy postmenopausal women showed reduced arterial stiffness compared with placebo. Trials in dialysis and aortic stenosis populations have been less convincing.

Beetroot juice or nitrate capsules?

Juice has the stronger trial record. Whichever you use, avoid antibacterial mouthwash, which kills the oral bacteria needed to convert nitrate to nitrite.

Cardiovascular

Moderate Evidence

Arterial Flexibility

Reduced arterial stiffness for healthier blood pressure.

TL;DR

Arterial stiffness predicts cardiovascular events independently of blood pressure. Nitrate-rich beetroot, citrulline, omega-3 and vitamin K2 all show measurable improvements in pulse wave velocity.

Why It Matters

Carotid-femoral pulse wave velocity is the reference measure of arterial stiffness and predicts stroke and cardiac events beyond conventional risk factors. Stiffness rises with age, hypertension, diabetes, smoking and arterial calcification. A 1 m/s increase in pulse wave velocity carries roughly a 14 percent higher risk of cardiovascular events, so even small improvements matter at population level.

How to Measure

Carotid-femoral pulse wave velocity is the gold standard, available in vascular labs. Simpler proxies include augmentation index from applanation tonometry, brachial-ankle PWV, and endothelial function via flow-mediated dilation. Supporting labs: lipid panel with ApoB, hs-CRP, HbA1c, and coronary artery calcium score where indicated.

Biomarkers

Carotid-femoral pulse wave velocity

Augmentation index

Flow-mediated dilation

hs-CRP

ApoB

Optimization Protocol

Aerobic exercise is the most reliable lever: 150 minutes weekly of moderate cardio measurably lowers pulse wave velocity within 8-12 weeks. Reduce sodium below 2300 mg/day, control blood pressure, and stop smoking. Supplement layer: dietary nitrate from beetroot juice 300-600 mg nitrate/day, L-citrulline 3-6 g/day, EPA/DHA 2-3 g/day, and vitamin K2 as MK-7 180 mcg/day to slow arterial calcification. Anyone on warfarin must not add K2 without clinical supervision.