The purpose of this study is determine salivary gland disposition of d-limonene, the primary component in citrus peel and a common dietary supplement.

Salivary gland tissue and saliva will be collected to determine concentration of d-limonene and its metabolites in these tissues.

Primary Objective: To determine the bioavailability of Alda-341 in salivary gland tissue.

Secondary Objective: To determine the bioavailability of Alda-341 in saliva and blood

Inclusion Criteria:

• Elected to undergo surgery for recent diagnosis of parotid or submandibular gland tumor
• Ability to adhere to study visit schedule and other protocol requirements
• Operable candidate base on the surgeon's note
• Ability to understand and the willingness to sign a written informed consent document

Exclusion Criteria:

• Nursing or pregnant
• Diagnosis of kidney disease, history of renal disease with creatinine > 1.5 mg/dL, or currently on dialysis
• Diagnosis of end stage liver disease
• Any unstable medical condition
• Use of chemotherapy or radiotherapy within 4 weeks before first dose of study dietary supplement
• Unwilling to stop dietary supplements 3 weeks before first dose of study dietary supplement