Couple of things come to mind - probably working together: The human body changes at slower pace than our diet in the last 60 years. Transforming food by cooki

Couple of things come to mind - probably working together: The human body changes at slower pace than our diet in the last 60 years. Transforming food by cooking, curing, salting, smoking, grinding and fermenting has been around for thousands of years and we have adapted to it. Eating food deconstructed and isolated is somewhat new invention. And the second is - with processed and refined stuff it is easier to OD. 20 grams of whey protein is probably the amount of protein you get from couple of liters of milk or a kilogram of milk. And we usually have consumed both casein and whey together.