Breast cancer chemotherapy associated with taste alterations and dietary changes in Italian cohortChemo Taste Changes: Patients Feel More Than Tests Detect

Frontiers in Medicine Published April 22, 2026 DOI ↗ Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease

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Key Takeaway

Note that breast cancer chemotherapy is associated with taste alterations and dietary changes in this Italian cohort.

This prospective observational cohort study included 94 enrolled female patients with breast cancer, with 70 included in statistical analyses. The setting was the Candiolo Cancer Institute FPO-IRCCS in Torino, Italy. Patients underwent chemotherapy, with evaluations performed pre-chemotherapy and post-chemotherapy. The primary outcome was taste alterations, assessed both subjectively and objectively using taste strips. Secondary outcomes included dietary habits and anthropometric variables.

Subjective assessment of all taste modalities was significantly altered from pre- to post-chemotherapy. Objective assessment using taste strips showed that one third of patients exhibited taste impairment. There was limited agreement between subjective and objective measures. No serious adverse events or discontinuations were reported regarding tolerability.

Multiple regression models adjusted for age, smoking status, and pack-years revealed specific associations. Higher education levels were inversely associated with subjective deterioration in sour taste perception (β = −0.49; 95% CI −0.82, −0.16; p = 0.006) and bitter taste perception (β = −0.47; 95% CI −0.79, −0.13; p = 0.006). Higher carbohydrate intake was inversely associated with worsening of overall taste perception (β = −1.96; 95% CI −3.72, −0.20; p = 0.035), sour taste perception (β = −2.05; 95% CI −4.01, −0.09; p = 0.044), and salty taste perception (β = −1.92; 95% CI −3.76, −0.04; p = 0.046).

Limitations include the heterogeneity of assessment methods and limited agreement between subjective and objective measures. Funding or conflicts of interest were not reported. The study design precludes causal conclusions. Taste alterations affect a substantial proportion of patients with breast cancer undergoing chemotherapy, suggesting a need for supportive care monitoring.

Why Food Tastes Different

Chemotherapy is powerful, but it comes with tough side effects. Taste changes can stop people from eating enough food. This hurts recovery and lowers quality of life during treatment.

Doctors have known this happens for years. But we did not fully understand how it happens. Now, a new study looks closer at the problem.

The Surprising Test Disagreement

For a long time, we relied on patient reports. We also used special paper strips to test taste. We assumed these two methods matched perfectly. But here is the twist.

The new study found they do not match. Patients reported big changes. But the paper strips showed fewer problems. This suggests the tests miss what people actually experience.

How Taste Buds React

Think of your taste buds like tiny sensors on your tongue. Chemotherapy can damage these sensors or change how they send signals. It is like a radio getting static between the station and the speaker.

This interference makes food taste strange or bland. It is not just in your head. The biology of your mouth is changing during treatment.

Researchers followed 94 women with breast cancer. They tracked them from July 2023 to June 2025. Everyone answered questions about their taste. Some also used the special taste strips.

Almost everyone said their taste changed after treatment. However, only one-third showed changes on the paper strips. This gap is important for doctors to know.

This doesn’t mean this treatment is available yet.

Higher education levels were linked to less taste loss. Eating more carbohydrates also helped protect taste. This suggests lifestyle plays a role in side effects.

Experts say this helps doctors listen better to patients. It shows we need better ways to measure taste. It is not just about the tongue.

You should talk to your care team about food. Do not ignore changes in your appetite. Small diet tweaks might help manage the taste.

The study was small and focused on one group. It only looked at breast cancer patients. We need more research to confirm these results.

More trials are needed to test new solutions. Doctors will use this data to improve care plans. Research takes time to reach everyone.

Study Details

Study typeCohort

EvidenceLevel 3

PublishedApr 2026

View Original Abstract ↓

BackgroundTaste alterations are a common adverse effect of chemotherapy and may substantially impair quality of life, social interactions, and dietary habits. Reported incidence rates vary widely, partly due to the heterogeneity of assessment methods. This study aimed to investigate chemotherapy-induced taste alterations in patients with breast cancer using both objective (taste strips) and subjective (questionnaire-based) measures.Materials and methodsThis was a prospective study conducted between July 2023 and June 2025 at the Candiolo Cancer Institute FPO-IRCCS, in Torino (Italy). Sociodemographic, clinical, anthropometric variables, and dietary habits were collected. Taste alterations were evaluated using both subjective and objective assessment tools (taste strips).ResultsA total of 94 female patients were enrolled. Of these, 70 patients had completed chemotherapy and taste evaluation and were included in the statistical analyses. According to subjective assessment, all taste modalities were significantly altered from pre- to post-chemotherapy evaluation, whereas one third of patients exhibited taste impairment when assessed using taste strips. The two methods showed limited agreement. In multiple regression models adjusted for age, smoking status, and pack-years, higher education level was inversely associated with subjective deterioration in sour (β = −0.49; 95% CI −0.82, −0.16; p = 0.006) and bitter taste perception (β = −0.47; 95% CI −0.79, −0.13; p = 0.006). Moreover, carbohydrate intake was inversely associated with worsening of overall taste perception (β = −1.96; 95% CI −3.72, −0.20; p = 0.035), as well as sour (β = −2.05; 95% CI −4.01, −0.09; p = 0.044) and salty taste perception (β = −1.92; 95% CI −3.76, −0.04; p = 0.046), based on subjective assessment.ConclusionTaste alterations affect a substantial proportion of patients with breast cancer undergoing chemotherapy. The low agreement observed between subjective and objective measures suggests that these methods may assess distinct aspects of taste dysfunction and should be interpreted accordingly.

Breast cancer chemotherapy associated with taste alterations and dietary changes in Italian cohortChemo Taste Changes: Patients Feel More Than Tests Detect

Why Food Tastes Different

The Surprising Test Disagreement

How Taste Buds React

Study Details

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Breast cancer chemotherapy associated with taste alterations and dietary changes in Italian cohortChemo Taste Changes: Patients Feel More Than Tests Detect

Why Food Tastes Different

The Surprising Test Disagreement

How Taste Buds React

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