Objective: Decreased appetite is one of the main factors that influences quality of life of patients with chronic liver diseases. The reason for appetite disorders remains unclear but taste perturbations are one of the postulated causes. The potential role of taste alterations and, connected to these, appetite disorders in chronic hepatitis C (CHC) patients are poorly investigated. The aim of this study was to evaluate potential taste alterations (dysgeusia) including all five tastes (sweet, salty, bitter, sour and umami) in CHC patients.
Methods: Forty CHC patients (16 men and 24 women) infected with genotype 1 hepatitis C virus participated in this study. All the patients had a compensated liver disease and were being treated with any agents. One hundred and ten healthy volunteers were matched to the patients by age and sex. The study included gustatory tests (taste recognition threshold, taste intensity with hedonic perception) and analysis of the pleasure derived from eating.
Results: In CHC patients, the recognition threshold of umami taste was increased (P<0.01) and the intensity of sweet taste perception was higher (P<0.05). The hedonic response did not differ between the groups. A significant increase in declared pleasure derived from eating (P<0.001 to P<0.05) was also observed. Some differences in case of the patients with more advanced disease were also found.
Conclusion: Alterations in taste, especially umami and sweet taste disorders, may alter real food perception and lead to a reduction in food intake in some CHC patients.
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