Acute ingestion of citrulline stimulates nitric oxide synthesis but does not increase blood flow in healthy young and older adults with heart failure.
Kim IY, Schutzler SE, Schrader A, Spencer HJ, Azhar G, Deutz NE, Wolfe RR. Acute ingestion of citrulline stimulates nitric oxide synthesis but does not increase blood flow in healthy young and older adults with heart failure. Am J Physiol Endocrinol Metab. 2015 Dec 01; 309(11):E915-24.