“In an article published this week in the journal BioEssays, researchers from UC San Francisco, Arizona State University and University of New Mexico concluded from a review of the recent scientific literature that microbes influence human eating behavior and dietary choices to favor consumption of the particular nutrients they grow best on, rather than simply passively living off whatever nutrients we choose to send their way.” https://www.ucsf.edu/news/2014/08/116526/do-gut-bacteria-rule-our-minds
Research on decision-making (and the influence of gut bacteria) has changed over time. However, not everyone will accept these new findings the same way. People who believe they are in full control of their decisions may not want to accept the research. In contrast, others may easily accept the research if it allows them to accept less personal blame for poor eating habits.