This is probably a daft question, but what is PE value? I only know it as a financial reckoning of the value of a company (price/earnings value or ratio).
It refers to Ted Naiman’s (currently in vogue) diet/way of eating - Protein Energy - which prioritises protein. The idea is that by doing this you increase muscle mass and lose fat. He uses a formula in which the aim is to have foods where the total protein grams are greater than or equal to the combined fat and carb grams.
More here: https://www.diabetes.co.uk/forum/threads/p-e-dieting.180913/