Uploaded July 2026 | Updated September 2026, 2 weeks ago
Vitamin K supplements are touted for bone, brain, and heart health benefits, but have they actually been shown to help?
Vitamin K supplements are touted for bone, brain, and heart health, but have they actually been shown to help? To complicate matters, there are multiple types: Vitamin K1 is concentrated in greens, and a type of vitamin K2 is found in animal products. Do we need both? Do we have to rely on a healthy microbiome for conversion from one type to the other? Do we have to eat a slimy, fermented food called natto?
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Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM
Captions for this video are available in several languages; you can find yours in the video settings. View important information about our translated resources: nutritionfacts.org/translations-info
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Vitamin K supplements are touted for bone, brain, and heart health benefits, but have they actually been shown to help?
Vitamin K supplements are touted for bone, brain, and heart health, but have they actually been shown to help? To complicate matters, there are multiple types: Vitamin K1 is concentrated in greens, and a type of vitamin K2 is found in animal products. Do we need both? Do we have to rely on a healthy microbiome for conversion from one type to the other? Do we have to eat a slimy, fermented food called natto?
We now offer a growing library of on-demand webinars for CME credits. To learn more and register, visit us on the LearnWorlds platform (nutritionfacts.learnworlds.com/).
New subscribers to our e-newsletter always receive a free gift. Get yours here: nutritionfacts.org/subscribe/.
Have a question about this video? Leave it in the comment section at nutritionfacts.org/video/should-you-supplement-with-vitamin-k2 and someone on the NutritionFacts.org team will try to answer it.
Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at nutritionfacts.org/video/should-you-supplement-with-vitamin-k2. You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.
Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM
Captions for this video are available in several languages; you can find yours in the video settings. View important information about our translated resources: nutritionfacts.org/translations-info
NutritionFacts.org
• Subscribe: nutritionfacts.org/subscribe
• Donate: nutritionfacts.org/donate
• Podcast : nutritionfacts.org/audio
• Books: nutritionfacts.org/books
• Shop: drgreger.org
• Facebook: facebook.com/NutritionFacts.org
• Twitter: twitter.com/nutrition_facts
• Instagram: instagram.com/nutrition_facts_org
