<<Disclaimer: Verify this information before applying it to your situation.>> My daughter and I have celiac disease, she since age 6 and I since age 43. Both of us have experienced problems with muscle weakness and lack of muscle tone despite regular workouts since we were diagnosed. This has persisted despite everything else about the condition improving on GF diet. Does anyone know of specific muscle problems related to celiac disease? Hank Kaplan Seattle, Wash