SupplementsDaily Multivitamin
Vitamins
A standard daily multivitamin helps fill everyday nutrient gaps. Large trials (Physicians' Health Study II, COSMOS) found a modest lower rate of total cancer in older adults taking one — helpful, but not a replacement for a healthy diet.
Relevant for
- Covers small gaps in vitamins and minerals, supporting overall nutrition during treatment.
- Two large randomized trials in older adults linked a daily multivitamin to a modest reduction in total cancer incidence.
- Convenient baseline support when appetite or variety is limited.
Take one standard once-daily multivitamin with food. Choose a reputable brand without mega-doses.
Not a substitute for eating well — food is the best source. Avoid high-dose formulas; high-dose beta-carotene can raise lung cancer risk in smokers. Always tell your oncologist what you take, as some nutrients interact with chemo/radiation.
Learn more from trusted sources
- American Cancer Society — NutritionEating well during and after cancer treatment.
- American Institute for Cancer Research (AICR)Evidence-based cancer-prevention diet and lifestyle guidance.
- National Cancer Institute — NutritionNutrition in cancer care (U.S. NIH).
- World Cancer Research Fund (WCRF)Global research on diet, activity and cancer.
- Cancer Research UK — Diet & CancerManaging diet and eating problems during treatment.
This information is educational and may support wellbeing — it is not medical advice and never a promise of a cure. Always consult your oncology care team before changing diet, supplements, or medication.