You of course are totally wrong in this but never mind, the french language is not one that allows much in the way of common usage
And the inverse of The term déjà vu which is French and means, literally, "already seen." Those who have experienced the feeling describe it as an overwhelming sense of familiarity with something that shouldn't be familiar at all. Say, for example, you are traveling to England for the first time. is Jamais vu. It's a French word meaning “never seen”. It's the feeling or experience that a person knows or recongnizes a situation, but that it still seems very unfamiliar or unknown.
You where probably alluding to some construct of your own.
Still I digress and will desist from going of topic.
As for diets of people in the past that didn't lead to T2 diabetes I can give an example of part of the diet consumed daily by my mother's great uncle in the 1800s
His daily breakfast consisted in part of 6 rashers of bacon, 6 sausages, 6 eggs and half a loaf of bread sliced and buttered. a quantity of milk and a pot of tea.