Decrease in or Loss of Taste
Decrease in or loss of taste is common in older adults. It is part of the normal aging process and may be caused by:
- A decrease in the number of taste buds.
- Changes in the way the nervous system processes the sensation of taste. This may cause a decline in the awareness of taste.
- A decrease in the amount of saliva or an increase in the stickiness of saliva.
- Changes in the tongue, making it harder for flavors to reach the taste buds.
Other factors that may cause a decrease or loss of taste include:
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- Loss of smell. Much of what is thought of as taste is actually smell.
- Minor infections, such as a cold or flu.
- Smoking or using smokeless (spit) tobacco.
- Side effects of medicine, surgery, or radiation therapy.
- Nutritional deficiencies of zinc or vitamin B12.
- Diseases, such as Alzheimer's disease, Bell's palsy, hepatitis, Sjögren's syndrome, and oral cancer.
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