Mayo Clinic Cancer Doctor: 5 Foods That Heal the Body, Starve Cancer, & Prevent Disease

What It Covers

Mayo Clinic oncologist Dr. Dawn Musalem, a stage four cancer survivor, shares research-backed evidence on five specific cancer-fighting foods, exercise protocols that reduce breast cancer mortality by 50%, and lifestyle interventions that add up to eleven years to life expectancy.

Key Questions Answered

• •Berry consumption for cancer prevention: Eating two servings of frozen berries weekly reduces breast cancer risk and lowers mortality for breast cancer survivors by 25% according to the Nurses Health Study. Wild frozen berries contain anthocyanins that turn off tumor-promoting genes and activate tumor suppressor genes at the DNA level.
• •Purple sweet potatoes contain 150% more anthocyanins: These vegetables contain cancer-fighting compounds that modify gene expression by turning off tumor promoter genes and activating tumor suppressor genes. Daily consumption provides metabolic benefits and represents a staple food in Okinawa, Japan, where women achieve the longest life expectancy globally.
• •Cruciferous vegetables work best when eaten raw: Broccoli, cauliflower, and brussels sprouts contain myrosinase enzyme when raw, which enhances absorption of cancer-fighting phytonutrients. If cooking these vegetables, consume a small amount raw beforehand or add dry mustard seed after cooking to maintain the enzyme's beneficial effects on estrogen metabolism.
• •Exercise during chemotherapy improves survival by 50%: Research demonstrates that breast cancer patients who exercise during treatment experience up to 50% reduction in mortality from all causes. The mechanism involves maintaining muscle mass, improving treatment response, and reducing fatigue. Even five to ten minute walks after meals provide measurable benefits.
• •Ultra-processed foods drive cancer mortality significantly: Consuming foods with mono and diglycerides increases breast cancer risk by 24% and prostate cancer risk by 46%. Carrageenan raises breast cancer risk by 32%. Reading ingredient labels and avoiding chemical additives represents a critical prevention strategy, as 60% of American diets consist of ultra-processed foods.