Many in the low-carb community reject mainstream nutritional guidance due to flawed past guidance like the food pyramid.

“I think one of the challenges in the low-carb community is you have a group of people who have become very used to rejecting mainstream information because they did so with nutrition right if you are on a low carbohydrate diet on some level you have decided that the a da the aah a the USDA the NIH and the CDC are full of [ __ ] I think that's fair point okay do you know what I think that when it comes to nutrition that's largely true now that I think they're coming around but I think it's largely true and I think the body of evidence the body of literature that pointed towards the food pyramid was quite shoddy”