Perhaps the commonest cause of taste problems, especially in the elderly, is problems in the mouth - with teeth or saliva. Any condition which results in a dry mouth can cause problems because saliva is essential for taste. Chemicals in food or drink dissolve in saliva and this bathes the tastebuds - in a dry mouth, the chemicals never reach the tastebuds. Anything which causes inflammation in the mouth can damage the taste buds. Ill-fitting dentures or teeth and gums full of decay are some of the major culprits.
Smoking can also destroy taste.
Make sure that your grandfather has seen his doctor to rule out any medical causes, and a dentist to check his mouth and gums. Then it's a matter of trial and error in the kitchen to find ways to tempt his palate. Alternatively, you might want to explore complementary therapies such as acupuncture. Visit our extensive Ask the Doctor library of all previously asked questions and answers covering a wide range of topics. Full A to Z listing Category listing Keyword Search using the box on the right .