To be absolutely brutal and honest with you, nobody cares about I look forward to hearing from you.. The practical reason is that it's one of the various standard and conventionally polite ways to end the body of the letter. It's just a standard exit.
1 In some cases, liver failure causes this taste to occur. 2  Gastroesophogal reflux disease can cause the salty taste (even when no pain is present). 3  Some medicines can make everything taste odd. for example the drug enalapril, which is a drug used to prevent heart failure.
Salty taste is composed of Fire and Water and is hot, heavy, and moist by nature. It is found in any salt (such as sea salt and rock salt), sea vegetables (like seaweed and kelp), and foods to which large amounts of salt are added (like nuts, chips, and pickles).