A Christmas cookie dietary restriction

Most of us are familiar with common dietary restrictions.

For instance, we all know what’s involved with being a vegetarian. And you might know what makes someone a vegan.

Some other dietary labels are pretty much self-explanatory. You know, lactose-free or gluten-free. The list goes on.

But what do you call it when a person will not eat Christmas cookies covered with shiny sprinkles or glittery specks that may or may not be made from edible substances?