Supplement–drug interactions
Supplements That Interact with Chemotherapy / radiation
6 supplements in NutriDex have a known or theoretical interaction with chemotherapy / radiation, including 1 best avoided entirely. Grouped by severity below; each links to its full evidence, dosing & mechanism. This is educational and not exhaustive — always tell your doctor or pharmacist about every supplement you take before combining it with medication.
Avoid — do not combine 1
Lowers chemo drug levels, potentially reducing anticancer efficacy.
Caution — use only with medical guidance 5
Green tea/EGCG can inactivate bortezomib and may interfere with some chemo — discuss with oncologist.
Antioxidant NAC may theoretically protect tumor cells and blunt oxidative chemo/radiation — consult oncologist.
High-dose selenium antioxidant may theoretically alter chemo/radiation efficacy or toxicity — consult oncologist.
High-dose antioxidant vitamin C may theoretically reduce some chemo/radiation efficacy — discuss with oncologist.
High-dose vitamin E may theoretically interfere with oxidative chemo/radiation — discuss with oncologist.
Each supplement links to its full evidence, dosing, mechanism & citations. See also all medication interaction guides →