I don't believe, as some do, that they always knew they were wrong but were promoting the high-carb diet because they were supported by the big cereal companies. I think that, like many health professionals, they were misled by the misinterpretation of the dietary studies of Ancel Keys. But at the time, the consensus was that the diet they supported was the best choice.

Today, we have new evidence, and if the ADA wants to keep anyone's respect, it's time they follow Crick's advice, admit their mistakes, get rid of their old ideas, and move on. It's time they switch their focus from politics to real science that helps real patients.

Until they do, some of us think the whole organization is not to be trusted.