Vitamin K2: Is a supplement a good idea?

Vitamin K2: Is a supplement a good idea?

Author: QuickAndDirtyTips.com, Monica Reinagel, MS, LDN August 19, 2026 Duration: 14:48

876. There's no vitamin F or G. After E, we jump straight to K, and that quirk is a hint that this nutrient is more complicated than it looks. Vitamin K isn't one thing. It's a whole family of compounds -- K1, K2, MK-4, MK-7 -- that come from different sources and do completely different jobs, from blood clotting to steering calcium into your bones instead of your artery walls.


In this episode, Monica untangles the confusing terminology and gets to the question listeners keep asking: does a vitamin K2 supplement actually protect your bones? She digs into what the research really shows, including a widely cited meta-analysis that lumped together two very different kinds of studies, why the prescription-strength results don't tell you much about the low-dose supplement in your cabinet, and whether the food and gut bacteria you already have might be doing the job on their own. Plus, the truth about taking vitamin K with your vitamin D.


New to Nutrition Diva? Check out our special Spotify playlist for a collection of the best episodes curated by our team and Monica herself! 

We've also curated some great playlists on specific episode topics including Staying Strong as We Age, Diabetes, Weight Loss That Lasts and Gut Health! Also, find a playlist of our bone health series, Stronger Bones at Every Age. 

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Nutrition Diva is a part of the Quick and Dirty Tips podcast network. 


Related episode

713 - Can vitamin K2 prevent osteoporosis?


References

Efficacy of vitamin K2 in the prevention and treatment of postmenopausal osteoporosis: A systematic review and meta-analysis of randomized controlled trials - PubMed 

Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam Study - PubMed 

Vitamin K2 and D in Patients With Aortic Valve Calcification: A Randomized Double-Blinded Clinical Trial | Circulation 


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You're probably tired of the constant noise around what to eat, with every headline seeming to contradict the last. Nutrition Diva cuts through that confusion. Hosted by Monica Reinagel, a seasoned expert from QuickAndDirtyTips.com, this weekly conversation feels like getting clear, practical advice from a trusted friend who actually understands the science. Instead of pushing fads, Monica takes the latest nutrition research and unpacks it in a way that makes sense for real life, separating the solid findings from the hype. She directly tackles the questions that pop up in your own kitchen, whether you're wondering about a new superfood or just trying to pack a better lunch. The goal isn't perfection, but building a sensible, sustainable approach to food that leaves you feeling informed and in control. Tuning into this podcast means replacing anxiety with actionable knowledge, so you can make choices that are right for you without the dogma. It's a grounded resource for anyone who wants to think about health and eating well, but could do without the extreme diets and scare tactics.
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