02/02/2026
What’s All the Hype About Vitamin K2?
Vitamin K2 has been getting more attention lately in relation to hyperparathyroidism, calcium, and vitamin D supplements, especially in conversations about bone health and calcium metabolism. Interestingly, despite a growing amount of information available online, vitamin K2 still lives mostly in the background when it comes to mainstream, peer-reviewed medical literature.
There are a few reasons for that. One is practical: vitamin K2 is not patentable in any meaningful way, which means there is very little financial incentive for large pharmaceutical companies to fund expensive clinical trials. As a result, you won’t see vitamin K2 featured prominently in the major journals the way you might see a new drug or device.
Another issue is that we don’t have a clearly established recommended daily allowance (RDA) for vitamin K2. Different populations consume very different amounts through diet, and the research hasn’t yet settled on a single “correct” dose. Complicating matters further, there is no widely available, reliable blood test to measure vitamin K2 levels. That makes large-scale studies harder to design and interpret.
It’s also important to clarify a common point of confusion: vitamin K2 is not the same as vitamin K1. Vitamin K1 is primarily involved in blood clotting and is what most people think of when they hear “vitamin K.” Vitamin K2, on the other hand, plays a different role—helping direct calcium to where it belongs, particularly into bones and away from soft tissues. Because they share a name, the two are often lumped together, but functionally they are quite distinct.
In my own practice, I have been recommending the addition of vitamin K2 alongside calcium and vitamin D for many years, particularly in patients concerned about bone health and calcium balance. Only more recently have other parathyroid experts begun to publicly emphasize the same approach.
Based on the available evidence and clinical experience, my personal recommendation for vitamin K2 (MK-7) supplementation is 200–300 micrograms daily. While this is not an official guideline, it reflects what I believe to be a reasonable and safe range for most adults.
As with many nutritional supplements, vitamin K2 sits at the intersection of emerging science and clinical judgment. The absence of large trials does not mean it lacks value—it often means the system has little incentive to study it.
This information is educational and not a substitute for medical advice. Talk with your own clinician about your specific situation before starting any new supplement.