The Acetylcholine Receptor (AChR) Antibody test detects antibodies that attack acetylcholine receptors, which are essential for muscle contraction. It is primarily used to diagnose myasthenia gravis, an autoimmune disorder causing muscle weakness. 

Preparation: No special preparation or fasting required.  

Procedure: A simple blood draw.  

Interpretation:  A positive result suggests myasthenia gravis, indicating the immune system is targeting the body’s own receptors.  

Consult your healthcare provider for interpretation and next steps.