I got hooked on cranberry juice while in the hospital getting my AVR. It was the first thing I had besides ice chips after my AVR. I was so parched after surgery and so grateful to be alive and kicking after major surgery that nothing ever tasted that good to me in my life. It really stuck with me and I have been drinking it pretty regularly since. I'll drink a gallon in 3 or 4 days. My last 2 INRs have been 3.4 and 3.5. I'm only on 1.5mg of warfarin a day. I may cut back on the cranberry juice and see what happens, despite these study results.