Hidden Casein Intolerance: The Stool Test You Need

May 19, 2020 · to diagnose a casein intolerance there are several test options. An igg blood test. A sample of your blood is tested against the protein components of various foods, and if antibodies are present this signals an intolerance. Nov 21, 2022 · casein intolerance is the body’s reaction to casein protein by releasing igg antibodies. The symptoms of casein intolerance tend to get delayed for up to 72 hours.