blood thinner
9 interactions related to blood thinner
blood thinner + vitamin e
High-dose vitamin E supplements can add to the bleeding risk of anticoagulant and antiplatelet medications by inhibiting platelet aggregation and antagonizing vitamin K–dependent clotting factors.
spinach + warfarin
Spinach is one of the most concentrated dietary sources of vitamin K1, the very nutrient warfarin works against. Eating a lot of spinach, or suddenly changing how much you eat, can shift your INR out of its target range.
microgreens + warfarin
Microgreens are the immature seedlings of vegetables and herbs, harvested when the first true leaves emerge. On a per-gram basis they concentrate vitamin K1 (phylloquinone), the form found in green plants that directly opposes warfarin. Brassica-family and amaranth microgreens are highest. A garnish-sized sprinkle is usually trivial, but daily salad-sized or smoothie portions are a meaningful vitamin K source that can shift the INR.
psyllium + warfarin
Psyllium is a soluble fiber that forms a viscous gel in the gut, and it was long suspected of trapping warfarin and slowing its absorption. However, the limited human evidence available — a pharmacokinetic study and the monographs that cite it — found that psyllium does not measurably change warfarin's blood levels or its effect on the INR. Because warfarin has a narrow safety margin, keeping fiber intake steady and spacing the doses remains sensible, but a clinically meaningful interaction has not been demonstrated.
broccoli + warfarin
Broccoli is one of the most vitamin K1 (phylloquinone)-rich common vegetables, and vitamin K is the cofactor warfarin works by blocking. It is not about avoiding broccoli but about consistency: large swings in intake can move your INR and reduce warfarin's effect or raise bleeding risk.
brazil nuts + warfarin
Brazil nuts contain essentially no vitamin K, so they do not antagonize warfarin or destabilize INR the way leafy greens can. Their notable feature is a very high selenium content, but selenium has no established effect on how warfarin works or is metabolized. The only practical reason to keep brazil nuts modest is selenium safety, not anticoagulation.
walnuts + warfarin
Walnuts contain only trace amounts of vitamin K and small quantities of plant-based omega-3 (alpha-linolenic acid). Normal food servings are unlikely to meaningfully shift INR. The standard warfarin principle applies: keep your intake reasonably consistent rather than swinging between none and very large daily portions.
swiss chard + warfarin
Swiss chard is a high-vitamin-K leafy green, and warfarin works by blocking vitamin K. Large, sudden swings in how much chard you eat can move your INR out of range, but the interaction is manageable: the goal is steady, consistent intake rather than avoidance.
pumpkin seeds + warfarin
Pumpkin seeds (pepitas) are a low-vitamin-K food and do not meaningfully affect warfarin in normal snack portions. The general warfarin principle of keeping vitamin-K intake consistent still applies, but pumpkin seeds are not a notable source.