Age

18–70

Sex

ALL

Healthy volunteers

Not accepted

Age ≥18 and ≤70 years
Indication to start chemotherapy for:
* Metastatic triple negative breast cancer
* Metastatic testicular cancer
* Stage II-IV diffuse large B cell lymphoma
Chemotherapy scheduled to start in the next 6 weeks
Consuming solid foods and drinks is possible
≤50% of recommended daily intake in kcal consists of oral nutritional supplements
Oral mucositis grade ≤2 (Common Terminology Criteria for Adverse Events, version 5.0)
Ability to comply with all protocol-required actions
Written informed consent
For the intervention phase only: subjective change in taste since start of chemotherapy

Pregnancy
Currently experiencing taste or smell problems
Previous or current radiotherapy of head and neck region
Enteral feeding through tube or parenteral feeding
Participation in another clinical trial aimed at preventing or treating taste and/or smell alterations
Chronic (\>1 month) high dose corticosteroids (\>10 mg prednisone/day or equivalent).

The TASTY-steering Study