It is well known that the bad habits of an individual such as overeating or cigarette smoking are likely to result in a shorter life span for that individual. Recent studies in epigenetics suggest that at least some of these bad behaviours may also impact the health of that individual’s progeny to disease.

The Överkalix study (an isolated community in northern Sweden) found that a single winter of overeating as a child can biologically predispose one’s children and grandchildren to diabetes and heart disease, resulting in lifespans that are decades shorter than their peers1. The Avon Longitudinal Study of Parents and Children (ALSPAC) found that sons and grandsons of men who smoke during pre-puberty are at greater risk for obesity and other health problems2. How is it possible that a decision made by a child can have such catastrophic consequences for multiple.......