Arginine HCL may have a wide range of potential benefits beyond its use as a performance enhancer for athletes. MedlinePlus reports that possible benefits of arginine HCL supplementation include improving surgery recovery time, treating congestive heart failure, reducing chest pain in coronary artery disease, reducing bladder inflammation, treating erectile dysfunction, improving kidney function, and maintaining a healthy body weight in individuals suffering from muscle-wasting diseases such as HIV. Consult your physician before using arginine HCL as a treatment for any of these conditions.