Acetylcholine Receptor Antibodies are known as Anti-Acetylcholine Receptor Antibodies and the Anti-Acetylcholine Receptor Antibodies test requires fasting. Anti-acetylcholine receptor antibodies are a type of autoantibody found in the serum of patients with myasthenia gravis. The test for anti-acetylcholine receptor antibody requires the patient to fast for 12 hours after 8:00 p.m. on the day before the test, i.e., fasting is required. The day before the blood is drawn, the patient should avoid eating too much greasy, high-protein food and drinking a lot of alcohol, which may directly affect the results of the test. The normal value of anti-acetylcholine receptor antibody is negative or ≤0.03mmol/L. If the anti-acetylcholine receptor antibody is positive, it may be caused by epilepsy, by biliary cirrhosis, tonic muscular dystrophy and trisomy 21. When testing for anti-acetylcholine receptor antibodies, patients should not wear clothes with sleeves that are too tight or too small, so as not to roll up the cuffs when performing the blood draw, or to cause hematoma of the arm blood vessels because of the tightness of the sleeves after the blood draw.