The Results Of A Bad Lifestyle…


Do most people who get cancer simply have bad luck? Or is cancer something they might be able to prevent? A new study suggests the latter.

The study, whose results have just been published in Nature, revealed that it is mostly environmental and external factors like smoking, drinking, diet, getting too much sun and exposure to toxic chemicals that cause cancer, rather than intrinsic factors like random cell mutations.

Intrinsic factors accounted for just 10% to 30% of people’s lifetime risk of getting cancer, while extrinsic risks accounted for 70% to 90% for most common cancer types, the study showed.

“Cancer risk is heavily influenced by extrinsic factors,” the study researchers, who work at Stony Brook University in New York, concluded.

That’s good news for many, as it means that cancer might be more avoidable — through changes in our lifestyles — than we previously thought. “Environmental factors play an important role in cancer incidence and they are modifiable through lifestyle changes and/or vaccinations,” the researchers write.

Many experts cheered this finding. “There’s no question what’s at stake here,” John Potter, a doctor who studies cancer at the Fred Hutchinson Cancer Research Center, told Nature. “This informs whether or not we expend energy on prevention.”

The study’s conclusions do fly in the face of other cancer research.

A report in the journal Science published earlier this year concluded just the opposite: that roughly two-thirds of cancers were caused by intrinsic factors. (These findings came to be known as the “bad luck” hypothesis.)

But the Stony Brook researchers concluded that the incidence of cancer is too high for that to be true. “The rates of mutation accumulation by intrinsic processes are not sufficient to account for the observed cancer risks,” they write in the study published in Nature.

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2 responses to “The Results Of A Bad Lifestyle…”

  1. Belinda Avatar

    Breast cancer and prostate cancer..seeing those risks as substantial and then reading the risk factors…pretty scary reading actually.

    B. Parlour

    1. Savannah Avatar

      Thanks for the feedback. Please contact me on the contact button at the top of the page, if you ever have any questions that your need answered. Or advice. I am motivated to get all our readers interacting on this page.

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