Nutritional Supplementation in Head and Neck Cancers

This study is looking at how nutritional support before and during radiotherapy can help patients with head and neck cancer — specifically mouth, throat, or voice box cancer — maintain their weight and health through treatment. **You may be eligible if...** - You are 18 or older with confirmed squamous cell carcinoma of the mouth, throat, voice box, or nasal passages - You are receiving radiotherapy as your main treatment (with or without chemotherapy), either before or after surgery - You are still able to eat and drink by mouth at the start of the study - A baseline CT scan was taken within 30 days before starting radiotherapy **You may NOT be eligible if...** - You cannot eat or drink by mouth at baseline - You are unable to give informed consent - You do not meet the imaging and laboratory requirements Talk to your doctor to see if this trial is right for you.