Can multivitamins protect you from cancer?

“For a lot of people, multivitamins add an extra layer of security to ensure they’re getting at least minimum levels of essential vitamins and minerals to avoid nutritional deficiency or insufficiency, ” says Howard Sesso, associate professor of epidemiology at the Harvard T.H. Chan School of Public Health in Boston.

But can a multi also prevent disease, like cancer or heart disease? That remains an open question.