Can your diet have a lot to do with your inr readings? how do you follow a proper diet?

Yes.: Warfarin is a blood-thinning medication that helps treat and prevent blood clots. There is no specific warfarin (coumadin) diet. However, certain foods and beverages can make it so warfarin doesn't effectively prevent blood clots. The key to keeping your inr steady is consistent vitamin k intake. See: http://www.Ihtc.Org/patient/blood-disorders/clotting-disorders/coumadin-interactions-with-food/.