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.
Perhaps the most common cause of salty taste in the mouth is dehydration. When you are dehydrated, you concentrate the salts within the saliva. You will taste salt in your mouth and on your lips. If you over-exercise or are exposed to a hot environment without drinking enough water, everything tastes salty.