Thank you for the replies everyone. Unfortunately, gluten-free bascially takes us back to Square 1 in how to say no to wheat.
"I'm allergic to xyz," even if I'm not. <--- This is lying outright, which is a far worse problem than a little gluten.
"This is store bought and probably has junk in it. I don't eat processed food." <--- This probably works. But then, "no thanks" works just as well. Nobody has an emotional tie to something from Safeway.
"This is homemade, but I don't eat processed food." <--- This is a straight up insult. To a SAD, home-baked doesn't count as processed. And they've already gone through the extra effort of making it gluten-free. Refusing it insults your hostess/friend twice, first by calling their labor of love "processed," second by dismissing the extra effort.
"I'm trying to avoid sugar." <--- prompts requests to have just a little bit. In that case I have a little bit and don't stress.
"I am Primal I eat as our sacred ancestors did I only eat whole foods I don't put poison in my body" and similar primal screeds. <--- Assuming they weren't turned off by the screen, a SAD is justifiably puzzled. Wasn't gluten the poison.. there isn't any gluten here... why is it poison now?
I found that the best action is to say "no thanks" to store bought stuff, and to take one bite of home-made stuff. It's not going to kill me.
5'0" female, 42 years old.
Started Primal October 31, 2011, at a skinny fat 111.5 lbs.
Current weight: 101.5. lbs and holding steady. Spring yardwork here we come!
Co-worker 1: Needs to lose ~50. Now he wants to start Mayo Clinic Diet. Yeesh. Give it up, man.
Co-worker 2: Needed to lose ~55. Lost 20 from stress. Started Primal in Sept, lost 20 more, but gained 10 back on a carb spree. We're working on it.