I feel sad for those with a gluten free diet, all of the things I have tried so far feel like they were removed from the base of a budgie cage.
The rest is personal/medical preference. As Peter mentions its fine and I respect it but expect them to avoid making implications concerning my choice. If someone does start to harp on about my choice of eating meat I like to tell them I have already accommodate their sensitivity by not having it fully rare and still bleeding onto the plate. That usually starts a good argument.