There has not been a study that debunked the China Study, in fact the book sites several others that back it up. Another book called 'Prevent and Reverse Heart Disease' by Caldwell Essylstyn explains it even easier. http://www.dresselstyn.com/site/ He was a surgeon at the Cleveland Clinic who after many years, put his his patients on a plant based diet and not only did their cholesterol go down, none needed surgery. I followed it for the last year; no meat, dairy, poultry fish, oil or fats. I have a family history of high cholesterol and mine went from over 330 to less than 180 (The goal is less than 150). He correctly notes that your level can be at 170 or 180 and still have a heart attack. The goal is to get it down to 150 or less and your LDL below 80. No recorded heart attacks at those levels. Both books say the same thing, our western diet is the greatest cause of heart disease, cancer and diabetes. What the China Study showed is that people who ate plant based, non-processed diets have much lower rates of those diseases and those that moved to the US experienced those diseases at the same rates that American do. It truly is what we eat.