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Natural Ways to Reduce Cholesterol and How to Increase HDL Naturally.


When green tea is consumed in the form of whole leaves, or if it is steeped long enough to contain tannins, vitamin K is generally present in amounts significant enough to counteract the effects of warfarin (117,118), but if green tea is steeped for a short time, and the leaves are not consumed, green tea has very low concentrations of vitamin K (182).

Caution use of whole green tea leaves or powder in patients taking warfarin which may make achievement of therapeutic PTINR difficult. Vitamin K levels in coffee and tea was performed which revealed that vitamin K concentrations were about 0.03 μg/100 mL or less, and according to this source, brewed tea or coffee contains extremely small amounts of vitamin K and is not a dietary source (119).

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