NutriStack
Ginkgo Biloba and Vitamin K1, a caution.
Ginkgo's antiplatelet activity can mildly counter vitamin K1's pro-coagulant role; relevant for warfarin patients managing INR through K1 intake.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Ginkgo Biloba and Vitamin K1
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 1 source
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Ginkgo's antiplatelet activity can mildly counter vitamin K1's pro-coagulant role; relevant for warfarin patients managing INR through K1 intake.
Mechanism. Vitamin K1 enables clotting factor activation; ginkgo inhibits platelet aggregation. Net effect on PT/INR is small but adds variability.
Recommendation. For warfarin patients, keep both vitamin K1 intake and ginkgo dose stable. Monitor INR closely if either changes.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Ginkgo Biloba and Vitamin K1 are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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