That’s pretty much the voluntary diet of my son!
Color me skeptical.
Actually PB&J isn’t that bad nutritionally if you use whole grain bread and quality ingredients. I’m pretty nutrition conscious since I work out a lot and I’ve got to admit I’ve been eating PB&J from home for lunch at work (brown bagging it) every day for longer than I am inclined to admit. I love em.
Let’s see: Mac and cheese: can’t be eaten by those with milk allergies, lactose intolerance or who have sprue (problems with digesting gluten).
peanuts are also high on the list for causing allergies.
I suspect it’s not an allergy or immune system problem but a behavioral one.
The usual diet for immune allergies starts with white rice, green beans and chickens that don’t have a lot of antibiotics or chemicals.
But it’s probably high in protein and if he takes some vitamin C on the side he’ll do well.