Okay. Well, here's an example so I'm not being so confusing:

Say you're trying to eat gluten-free. You go to the store to buy meat and veggies only. You pick up some deli meat...but hey, it has gluten in it. It's not a "wheat" item, per say. And you wouldn't assume that there was gluten in it, but there is.

Eating gluten-free isn't that bad taste-wise, but when you're first starting out it's so time consuming finding out what has gluten in it.

I mean, shampoo and makeup, for Christ's sake?