Safety · Supplement
Vitamin K1: side effects, safety & interactions
Very safe; the key issue is consistency for anyone on vitamin-K-antagonist anticoagulants.
- Overall grade
- Grade B
- Last revised
- 0
- graded outcomes
- 0
- references listed
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
The evidence in words
Safety profile
Very safe; the key issue is consistency for anyone on vitamin-K-antagonist anticoagulants.
Interactions to respect
Anticoagulants (warfarin) — Directly antagonizes warfarin — keep intake consistent, never swing it.
What Vitamin K1 is
Vitamin K1 (phylloquinone) is the plant form of vitamin K, essential for blood clotting and distinct from bone-directed K2.
The honest bottom line
You get enough from greens. If you take warfarin, the rule is steady, consistent vitamin K — not avoidance.
Related reading
Entries that share this one's tags or conditions.
- Krill Oil: side effects, safety & interactionsSafe; shellfish-allergy caution. Mild antiplatelet effect like other omega-3s.Evidence grade C
- Vitamin K2: side effects, safety & interactionsVery safe. The critical exception: K2 (like K1) antagonizes warfarin and other vitamin-K-antagonist anticoagulants — anyEvidence grade B
- Algae Omega-3: side effects, safety & interactionsSafe and sustainable; mild antiplatelet effect at high doses.Evidence grade B
- Aloe Vera: side effects, safety & interactionsTopical is safe; oral aloe latex is a stimulant laxative with real risks — avoid it.Evidence grade C
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.