Hmmm. A mouse study testing a couple of widely used emulsifiers in processed food suggests that they make changes in the gut microbiota which are not good for us.
Most interesting comment in the report:
While detailed mechanisms underlying the effect of emulsifiers on metabolism remain under study, the team points out that avoiding excess food consumption is of paramount importance.
"We do not disagree with the commonly held assumption that over-eating is a central cause of obesity and metabolic syndrome," Gewirtz says. "Rather, our findings reinforce the concept suggested by earlier work that low-grade inflammation resulting from an altered
microbiota can be an underlying cause of excess eating."