Do you have a question about gluten-free living? Join the online discussion from noon to 2 p.m. May 19 as features writer and blogger Jessica Yadegaran chats with San Ramon registered dietician Kathi Nichols, who will answer your questions about the effects of gluten on the body and how to alter diet and lifestyle to adjust to a diagnosed gluten allergy or sensitivity. Nichols is a dietician of 30 years and lives with celiac disease, the most severe form of gluten intolerance.