RecruitingPhase 1Drug triald-Limonene +Radiation +PlatinumBasedChemo for Xerostomia Prevention in LocallyAdvanced HNSCCThis study explores the safety of d-limonene, a commercially-available dietary supplement (food) as a potential therapeutic for the severe dry mouth (xerostomia) experienced by patients with head and neck cancer as a side effect of their anti-cancer treatment.