There was another one, don't know if it was from the same list or not, but it was the all beet diet. Just beets. Season and cook them however you want, but that is all you are allowed to have. Period. My stepdad did the diet and nearly lost his goddamned mind.
In my experience "nutritional advice" changes completely every 7 years on average. In 2032 we'll probably be saying "nutritional advice used to be wild" about a lot of what we're taking for granted right now.