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.
The five main flavors that occur in taste acuity: 1  Salty (sodium chloride and other salts) 2  Sweet (sugars) 3  Sour (acids)  Bitter 1  (alkaloids) Umami (savory)-amino acids (Umami means delicious essence)  All other flavors are combinations of these five primary tastes, plus accompanying olfactory and taste sensations.