leafy greens
6 interactions related to leafy greens
collard greens + warfarin
Collard greens are one of the highest-vitamin-K vegetables available, with roughly 836 mcg of vitamin K1 per cup cooked - more than seven times the daily adequate intake for adults. Sudden increases or decreases in consumption directly antagonize warfarin and can push the INR out of its therapeutic range.
spinach + warfarin
Spinach is one of the highest dietary sources of vitamin K1 (phylloquinone), with roughly 145 mcg per cup raw and 889 mcg per cup cooked. Because warfarin works by blocking vitamin K-dependent clotting factor synthesis, large or fluctuating spinach intake antagonizes warfarin and can drop the INR into a sub-therapeutic range, raising clot risk.
turnip greens + warfarin
Turnip greens contain about 529 mcg of vitamin K1 per cup cooked - roughly five times the daily adequate intake. Because warfarin works by blocking vitamin K-dependent clotting factor synthesis, large or fluctuating servings can drop the INR into a sub-therapeutic range and raise clot risk.
microgreens + warfarin
Microgreens - the immature seedlings of vegetables and herbs harvested 7 to 21 days after germination - concentrate nutrients on a per-gram basis. Phylloquinone content varies widely by species, from roughly 0.6 to 4.1 mcg per gram, with brassica and amaranth microgreens highest. Daily handfuls or smoothie additions can supply enough vitamin K to oppose warfarin and shift the INR.
swiss chard + warfarin
Swiss chard delivers approximately 299 mcg of vitamin K1 per cup raw and over 570 mcg per cup cooked - several times the adult adequate intake. As a direct vitamin K antagonist, warfarin's effect is reduced when dietary phylloquinone rises, so sudden increases in swiss chard intake can lower the INR into a sub-therapeutic, clot-prone range.
mustard greens + warfarin
Mustard greens are a dark leafy green packed with vitamin K1, providing roughly 419 mcg per cup cooked - several times the adult daily adequate intake. Because warfarin works by blocking vitamin K-dependent clotting factor synthesis, large or fluctuating intake can lower the INR and reduce clot protection.