Same question, different scenario:
A pregnant woman will often crave the foods that contain just the nutrients her body requires at the time. Has she figured out exactly what her body needs and what foods contain it?
A pregnant woman will often crave the foods that contain just the nutrients her body requires at the time. Has she figured out exactly what her body needs and what foods contain it?
In terms of material supporting the theory, google "pregnant cravings nutrients" and you will get hundreds of results... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5054961/ https://familyandconutrition.com/food_cravings_pregnancy/ https://www.webmd.com/baby/features/pregnancy-food-cravings#...
I wouldn't dare call it "she", "knows", "exactly", in the strict sense, but the less-than-conscious parts of a human should have a pretty good though fuzzy experience of what foods are beneficial in which circumstances.
Calling it a "disorder" and "largely non-nutritive" seems a bit broad, when it could be satisfying a particular need. Even though eating feces might not be a good idea and more serious examples do seem useless and damaging.