Busting Myths

Science-based answers from the National Cancer Institute about common cancer myths and misconceptions.

Is cancer a death sentence?

The five-year survival rate for breast, prostate and thyroid cancer is 90 percent or better. For all cancers, the rate is 67 percent.

Does my attitude affect my ability to survive cancer?

There is no convincing scientific evidence that links a person’s attitude to developing or dying from cancer. It’s normal to feel a range of emotions.

Does sugar make my cancer worse?

No studies have shown that eating sugar will make your cancer worse or that your cancer will shrink or disappear if you stop eating sugar.

Do artificial sweeteners cause cancer?

Researchers have found no evidence that artificial sweeteners cause cancer in humans.

Do cell phones cause cancer?

No, according to the best studies completed so far. Cancer is caused by genetic mutations, and cell phones don’t damage genes.

Do antiperspirants or deodorants cause breast cancer?

No. Studies have not found evidence that chemicals found in deodorant and antiperspirants cause changes in breast tissue.

Are there herbal products that can cure cancer?

No. Some studies suggest complementary therapies, including some herbs, may help patients cope with side effects of cancer treatment. However, some herbal products may interfere with how chemotherapy or radiation therapy work.

Am I likely to get cancer if a family member has it?

Only five to 10 percent of cancers are caused by harmful mutations that are inherited from a person’s parents.

Am I risk-free if no one in my family has cancer?

No. About 38 percent of people will be diagnosed with cancer during their life. Most cancers are caused by genetic changes throughout a person’s lifetime, including a natural result of aging and exposure to environmental factors, such as tobacco smoke and radiation. Other factors include your diet and activity.