Dosage · Supplement

Vitamin K1: dosage and how to take it

Leafy greens; keep intake steady on warfarin.

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

Obtained from leafy greens; supplementation is rarely needed outside clinical settings. On warfarin, keep intake steady rather than avoiding greens.

There are no strict timing conflicts on record for Vitamin K1; consistency matters more than the exact hour for most goals.

K1 activates clotting factors in the liver via carboxylation; it is the direct antagonist of warfarin, which blocks that recycling.

You get enough from greens. If you take warfarin, the rule is steady, consistent vitamin K — not avoidance.

As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.

Entries that share this one's tags or conditions.

Krill Oil: dosage and how to take itDose to total EPA+DHA (often 2–4 capsules).Evidence grade C
Vitamin K2: dosage and how to take it90–180 µg MK-7 daily with vitamin D and fat.Evidence grade B
Algae Omega-3: dosage and how to take it250–1,000 mg EPA+DHA/day.Evidence grade B
Aloe Vera: dosage and how to take itGel for minor burns.Evidence grade C

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 Jul 10, 2026. A grade is this entry's reading of the evidence, not medical advice.