If I experience celiac disease or gluten intolerance symptoms, can I try the gluten-free diet before an actual diagnosis?

Most health professionals recommend that all screening and diagnosis occur prior to experimenting with a gluten-free diet.

Shortly after eating a gluten-free diet, the antibody screening blood tests and necessary biopsies become unreliable and will skew an accurate diagnosis. When there is no gluten consumed, you no longer produce the telltale antibodies.