consider the difference between causation and correlation. ready? good. a while ago i read an article about a correlation between tooth decay and heart disease. it went on to speculate on causation. seems really unlikely that heart disease could cause tooth decay. but it seemed reasonable, at least to the author, that tooth decay, which is a form of infection, could cause heart disease. which seems to be related to inflammation. ie infection. could they be related? hrm. maybe. but they could have a common cause. a more recent article suggested that many of our modern afflictions, including heart disease, stroke, diabetes, obesity, all showed up right around the time we switched to a high sugar diet. seems kinda ambitious to blame refined sugar for every ill. further investigation required. but if there's a link between tooth decay and heart disease, maybe. if i was a mythbuster, i'd call it plausible.