system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's with (what seems like) the sudden increase of gluten free foods, restaurants, diets, etc.?

Is there really an increase of people with Celiac Disease? Or are there benefits to being gluten free?
gpt
There are a few people with Celiac Disease, for whom a gluten-free diet is medically necessary.  Beyond that, it's just a fad.  Companies advertise products as gluten-free (gluten-free water!, gluten-free tupperware!) in order to make money.  It's of no benefit if you don't have the disease.