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.
What happens when you eat something salty. sodium ions spread through the blood and extracellular fluid but do not cross the membrane into the cells. The result is higher concentration of solutes outside the cells than inside, the osmotic pressure draws water from the cells into the extracellular fluid.