Vitamin K is almost always discussed only in the context of blood clotting. Ray Peat and I have pointed out for years that vitamin K has far broader metabolic roles, including supporting mitochondrial electron transport (as a cofactor for Complex III) and regulating calcium homeostasis. Low vitamin K status is linked to arterial calcification, insulin resistance, and now \u2014 as this study shows \u2014 poor lung function. The mainstream still frames this as a “dietary association,” but the mechanism is clear: vitamin K supports the energy-producing machinery that every cell, including lung tissue, depends on.<\/p>\n
As the study below demonstrates, researchers in Denmark examined over 4,000 people and found that those with\u00a0low vitamin K levels<\/strong>\u00a0had significantly worse lung function (spirometry measures) and were\u00a0twice as likely to have COPD, 81% more likely to have wheeze, and 44% more likely to have asthma<\/strong>. This is the first large population study linking vitamin K to lung health.<\/p>\n The bioenergetic explanation is straightforward. Vitamin K is essential for the proper functioning of the\u00a0electron transport chain<\/strong>\u00a0(ETC) in mitochondria, particularly as a cofactor for\u00a0Complex III (bc1 complex)<\/strong>\u00a0and as a regenerator of other antioxidants. Without adequate vitamin K, mitochondrial energy production is impaired, leading to increased oxidative stress and inflammation \u2014 both of which directly damage lung tissue. Additionally, vitamin K activates\u00a0Matrix Gla Protein (MGP)<\/strong>\u00a0, which prevents calcification of soft tissues. Lung tissue requires proper elasticity and calcium balance for normal function, and vitamin K deficiency leads to dysregulated calcium deposition and fibrosis.<\/p>\n The study did not use supplementation, only measured blood levels, so no HED calculation is needed from animal data. However, based on my previous writings and the literature,\u00a0therapeutically effective doses of vitamin K2 (MK-4 or MK-7) are typically in the range of 45\u2013200 mcg per day for maintenance, and up to 1\u20135 mg per day for therapeutic effects<\/strong>\u00a0(e.g., reversing arterial calcification). For lung health specifically, ensuring adequate vitamin K intake through diet (leafy greens, natto, or supplementation) is a simple, inexpensive intervention that mainstream medicine is only now beginning to explore.<\/p>\n The human-equivalent dose is not applicable here as this was an observational human study, not an animal dosing study.<\/strong> However, the takeaway is clear: vitamin K deficiency is common, especially in people with poor diet or malabsorption, and correcting it may protect lung function. I have said for years that vitamin K is not just a “clotting vitamin” \u2014 it is a fundamental metabolic support agent.<\/p>\n https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0002916526001334<\/a><\/p>\n