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A. Citrulline antibody is an immune protein (antibody) that binds to a non-standard amino acid (citrulline) that is formed by removing amino groups from the natural amino acid, arginine.Citrulline antibodies are measured with a blood test that is analyzed in laboratories.. Citrulline antibody is an immune protein (antibody) that binds to a non-standard amino acid (citrulline) that is formed by removing amino groups from the natural amino acid, arginine.
L-citrulline might not be effective for improving exercise performance. In one research test, L-citrulline did not improve performance on a treadmill. People who took L-citrulline actually became exhausted more quickly than people who did not take it. High blood pressure in children after heart surgery. L-citrulline might help reduce the high blood pressure that can occur after heart surgery in children.