Dry taste buds
Dry your tongue with a piece of kitchen paper.
Place a sugar cube on your tongue, keeping your mouth open. Then remove the sugar cube.
Can you detect a sweet taste on your tongue?
Close your mouth so that your tongue gets covered in saliva again.
Place the sugar cube on your tongue and close your mouth.
Is it easier to taste the sugar now?
Saliva is vital for tasting food. When you wipe away your saliva on kitchen paper, you realise just how important saliva is for tasting food. Saliva dissolves molecules, allowing them to penetrate the pores of your taste buds. Without saliva, the molecules do not bind to your taste receptors so they cannot convey information to your brain.