There's this guy who is a type 2 diabetic who runs a blog called "Diabetes Warrior". He does tests and experiments on himself and he recently tried a basically "zero carb" experiment. I don't know what happened with his
weight loss but I do know that it put his fasting glucose in the 70's with no need for insulin. He thinks the ADA high carb recommendations for diabetics are an atrocity (as do I) and recently his home state dietetic association threatened him with legal action because they claimed he was "giving out dietary advice without a license".
For us, its about losing weight. For him, its about getting his life back. Either way, he would do just fine with FTS recommendations for diet for the rest of his life, as would about half of the U.S. population.
I did read in another blog by a doctor that humans were built to eat low carb. I read somewhere else (sorry, can't remember sources!) that hunter gatherers ate absolutely no more than 80 TOTAL CARBS per day, and that was in summer when fruit was available! In winter, their carbs went down to almost zero!!!!
Remember, these are the same ancestors who had ZERO issues with diabetes, blood pressure, dental carries, heart attacks, and anything else we suffer from today. Hmmm..... caveman was on to something here.