Should You Take Vitamin D and Vitamin K Together?

While each vitamin is important on its own, taking vitamin D and K together may unlock even better health benefits.

By Stephen C. George; Medically Reviewed by Dr. Ahmad Talha Azam
Feb 29, 2024 6:00 PMMar 11, 2024 4:33 PM
Dnipro, Ukraine -09.09.2023: Bottle of vitamin D-3, K-2 by NOW in woman hand. Now Foods, D-3, K-2 1,000 IU 45 mcg. Vegetarian food supplements.
(Credit: Stas Malyarevsky/Shutterstock)

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Although they’re not very close together in the alphabet, and they don’t look much alike, the letters D and K actually have a lot in common — at least when you’re talking about vitamin D and vitamin K.

But there are differences between these nutrients, too. Here, we’ll explore what each vitamin does for the body and also look at how taking them together might unlock other health benefits.

What Are the Health Benefits of Vitamin D and Vitamin K?

For starters, both vitamin D and vitamin K are fat-soluble vitamins, meaning they do not dissolve in water and are best absorbed when eaten with a bit of fat. Both play a role in helping your body use calcium effectively. And the human body is actually capable of making a form of each vitamin: We can make vitamin D3 when our skin is exposed to sunlight, and bacteria in our gut are capable of synthesizing vitamin K2.

Health Benefits of Vitamin D

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