vitamin
Vitamin D3
Fat-soluble; pair with a meal containing fat for better absorption.
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Can You Take Vitamin D3 and Vitamin K2 Together?
Synergistic
These two work better together
Commonly paired; both fat-soluble and complementary.
Can I take Vitamin D3 and Vitamin K2 together?
Commonly paired; both fat-soluble and complementary.
How it works
The mechanism
Vitamin D increases calcium absorption; vitamin K2 activates osteocalcin and matrix-Gla protein, directing that calcium into bone and away from arterial walls. The two are often taken together to ensure calcium ends up where it's useful.
Dose where it matters
When the interaction actually matters
Pairing is most relevant at higher vitamin D doses (≥2,000 IU/day), where calcium handling becomes more important.
Who should care most
Who this matters for
Adults supplementing vitamin D long-term, particularly those with cardiovascular risk factors.
Evidence strength
Moderate evidence
Supported by mechanistic data and smaller human trials.
vitamin
Vitamin K2
Fat-soluble; commonly taken alongside Vitamin D3.
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