Should we be warning consumers about over-consumption of meat as well as sugar?
That's the question being raised by a team of researchers from the University of Adelaide, who say meat in the modern diet offers surplus energy, and is contributing to the prevalence of global obesity.
There is just one problem. The only data available is types of food, they have no idea whether the obese people ate any meat. Or any sugar. If just the availability of meat makes people obese, they have overturned everything science knows about cellular respiration.