How many branches does prosource have? ProSource has five total branches with other locations in Spartanburg and Anderson, South Carolina, and in Hendersonville and Asheville, North Carolina. ProSource is dedicated to surpassing customer expectations. We offer extensive product knowledge and training for our employees so we may assist you with all aspects of your project.What is prosource plus? ProSource Plus is a Food for Special Medical Purposes for use under medical supervision. ProSource Plus is a low volume, high protein (15g / 30ml), 3.3 kcal/ml, low electrolyte, ready to use supplement suitable for those with increased protein & calorie requirements.Where is prosource plumbing located? As one of the few independent plumbing supply organizations in the upstate, ProSource’s headquarters in Greenville now operates from an 86,000-square-foot location and employs over a hundred full time employees. As business has grown in Greenville, so has the demand in other areas of the Carolinas.How much protein is in prosource liquid? ProSource Liquid is a low volume, high protein (10g / 30ml), 3.3 kcal/ml, low electrolyte, ready to use supplement suitable for those with increased protein & calorie requirements. ProSource Liquid contains all essential and non-essential amino acids.