Around the time the USDA’s new dietary guidelines were released, a group of researchers published a rebuttal in the journal Nutrition, which I covered in a post titled The Dietary Guidelines Committee Receives The Spanking It Deserves.
One of the authors of that rebuttal, Dr. Richard Feinman, has meted out another well-deserved spanking on his blog. This time the unruly children produced a piece of bad science they claim demonstrates that high-protein / low carbohydrate diets aren’t any better at managing type 2 diabetes than high-carbohydrate diets. (That would certainly come as a shock the many readers who’ve emailed or commented to tell me how much their glucose control has improved since switching to a low-carb diet.)
I’ll just give you one highlight from Dr. Feinman’s post: the “low carbohydrate” diet was, according to the self-reported intake of the subjects, 41.8% carbohydrate. That might qualify as a Zone diet, but it’s certainly not a low-carbohydrate diet. And here’s the real kicker: I read the study, which shows that the “high carbohydrate” group consumed 48.2% of their calories as carbohydrates.
So a measly 6.4% reduction in carbohydrates didn’t make a big difference? Well, I am shocked. I guess we can all stop looking at carbohydrate restriction as a possible treatment for type 2 diabetes now. Better fill those prescriptions for Metformin and be done with it.
There’s more to the spanking than that, however, so I’d urge to you read Dr. Feinman’s full post. It’s always fun to watch a real scientist discipline the children.