Common Diet Questions for Cancer Patients
Debunking Mysteries about Health Supplements, Phytochemicals, Soybeans, Vegetarianism, and Raw Food Diets
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1. Dietary Supplements
The market is full of supplements and multivitamins, especially antioxidants. However, some studies show that taking antioxidant supplements during treatment may actually reduce the effectiveness of chemotherapy and radiotherapy. Eating at least five servings of non-starchy fruits and vegetables daily provides far greater benefits than pills.
2. Phytochemical Supplements
Phytochemicals are plant compounds believed to have anti-cancer effects, protecting and repairing healthy cells while regulating hormones to reduce cancer cell growth. While only a few phytochemicals have been identified, plants contain thousands more. Therefore, eating a variety of colorful, lightly cooked fruits and vegetables is far more effective than relying on supplements.
3. Soy and Breast Cancer
Soy contains isoflavones, a type of phytoestrogen. Current evidence shows that moderate soy intake (such as soy milk or tofu) does not increase breast cancer risk. In fact, some recent studies suggest that 1–2 servings of soy daily may help reduce recurrence in breast cancer survivors. Normal consumption of soy foods is safe.
4. Vegetarian Diets
You do not need to switch to a strict vegan diet. Instead, focus on reducing red meat and animal protein while emphasizing plant-based foods. Diets rich in nuts, legumes, fish, and olive oil—similar to the Mediterranean diet— have anti-inflammatory benefits and may help slow cancer cell growth.
5. Raw Food Diets
There is currently no strong evidence that raw or organic diets can treat or prevent cancer. In fact, during chemotherapy, when immunity is weakened, eating raw salads or unpeeled fruits may increase the risk of infection. Cooked vegetables and peeled fruits are safer choices.
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Reference
American Institute for Cancer Research (AICR)