Taste Alterations in Kidney Disease

Mechanism of Taste Disturbance

• Uremic toxin accumulation leads to elevated urea in saliva, which is converted to ammonia, causing characteristic ammonia taste and breath in approximately one-third of hemodialysis patients 1, 2, 3
• Altered salivary composition occurs with higher concentrations of urea, creatinine, sodium, potassium, chloride, and phosphorus compared to healthy individuals, directly affecting taste perception 1, 2

Clinical Considerations

• Xerostomia compounds the problem of taste alterations, as reduced salivary flow from fluid restriction, medications, and minor salivary gland fibrosis/atrophy further impairs taste perception 1, 2
• Metabolic derangements from uremia affect multiple organ systems, including the gustatory system, as part of the broader uremic syndrome 3, 4