Taste Alterations in Cancer Patients Causes, Effects, and Clinical Implications

Taste alterations are among the most frequently reported yet often underrecognized complications experienced by cancer patients during the course of their disease and treatment. Manifesting as dysgeusia, hypogeusia, ageusia, or phantogeusia, these sensory disturbances can arise from the direct effects of malignancy as well as from chemotherapy, radiotherapy, targeted therapies, and immunotherapies. The prevalence and severity of taste dysfunction vary depending on cancer type, treatment modality, individual patient characteristics, and assessment methods, but evidence consistently indicates a substantial burden across diverse oncology populations. The mechanisms underlying taste alterations are multifactorial and involve damage to taste receptor cells, impaired taste bud regeneration, salivary gland dysfunction, oral mucosal injury, inflammation, nutritional deficiencies, and neurotoxic effects associated with anticancer therapies. Interactions between gustatory and olfactory pathways further influence flavor perception and contribute to the complexity of symptom presentation. Head and neck cancer patients are particularly susceptible because treatment often affects structures directly involved in taste sensation and salivary function. The consequences of altered taste perception extend beyond sensory discomfort. Distorted or diminished taste can reduce appetite, change food preferences, decrease dietary variety, and impair nutritional intake. These effects may contribute to weight loss, malnutrition, reduced physical functioning, and poorer treatment tolerance. The impact is also evident in psychosocial domains, as eating plays a central role in social interaction, cultural practices, and emotional well-being. Persistent taste disturbances may therefore lead to frustration, social withdrawal, and diminished quality of life. Clinical management requires early recognition, routine assessment, and multidisciplinary intervention. Nutritional counseling, dietary modifications, oral care measures, and management of associated conditions such as xerostomia and mucositis are commonly employed to alleviate symptoms and support adequate nutrition. Despite growing awareness, standardized assessment tools and evidence-based treatment strategies remain limited. Greater understanding of the biological pathways involved in taste dysfunction and the development of targeted interventions may enhance supportive cancer care and improve outcomes for patients affected by these challenging sensory changes.