"I don’t need a study to tell me that the foods humans thrived on for thousands of years are safe. Meat, eggs, butter, salt—these aren’t experimental. They aren’t new. They built strong, healthy humans long before nutrition guidelines started telling us to fear them. "What is experimental? Ultra-processed lab creations, seed oils, and sugar-laden foods that have replaced real nourishment. The rise of modern diseases tracks right alongside the rise of these so-called “foods.” "Yet people demand studies to “prove” that steak and eggs won’t kill you, while they eat chemical-laden junk without a second thought." --Elie Jarrouge, MD
I think an important variant may be 'activity'. Not having to hunt the meat or walk to the river for water or run for your life may obscure the theory. Anecdotally,I always felt you could get away with more nutrition-wise and even 'vice'-wise if you were in good enough shape.
He forgot to mention a few other significant food sources humans have been eating just as long. https://www.nationalgeographic.com/foodfeatures/evolution-of-diet/ Speaking of the mostly meat eating Inuit, ... https://www.reuters.com/article/us-inuit-idUSN2362426520080123/
This is from the American Diabetes Society, not to be confused with the older, traditional American Diabetes Association. The ADS has been described as an organization that refuses funding from large food or pharmaceutical companies, aims to provide transparent operations (open books and meetings), and focuses on offering practical advice to reverse type 2 diabetes, particularly through addressing its root causes... rather than long-term management of diabetes as a chronic condition. In comparison, even though I am sure they do good work, I have lost a bit of faith in the ADA because as pointed out elsewhere they recommend that diabetics "Fill 1/4 of your plate with carbohydrate foods". It's very hard for me to imagine telling a person with diabetes or pre-diabetes that 25% of their meal should contain items that spike their blood sugar.