It's coming to a DSM near you one of these days: Orthorexia nervosa. You may find many victims of this disorder in the socially-distanced lines at Whole Foods. It's a harmless preoccupation other than the risk of annoying or boring your friends.
Another one is Binge Eating, aka Binge Eating Disorder. These are people who will ask for seconds, or eat ravenously until the food is gone. Historically it was just called the sin of gluttony, but now it's a diagnosis. It is interesting to me how various behaviors, maybe once attributed to demons, later to sins, are now DSM diagnoses.