Blood Thinners - What can cause mess up good results?

Tweet

My husband takes a blood thinner and I know from experience what can mess up good results when he goes in to have levels checked. Pineapple, black licorish, mayo, green leafy veggies, oils, illness, missed pills or excessive pills, dieting, and too much or too little exercise. What else can mess up a reading and send a person too high or too low? I thought I knew it all, until I learned about the first two listed here. What has been your experience?