The mouth contains around 10 thousands taste buds
all over, even in the back of the throat. Every taste bud detects five primary tastes: sour, sweet, bitter, salty, umami (salts of certain acids). All tastes come from a combination of these basic taste sensations.
You might have damaged your taste buds, due to smoking, or have a vitamin or mineral deficiency
(B-12 or zinc). But there is a third possibility, which has to do with a sinus drainage: most of what people perceive as taste is due to their ability to smell. So even if your taste buds are working well, your sense of taste may be impaired if you have a cold, nasal infection
, allergic rhinitis
or nasal polyps.