Most cancer cases ‘caused by lifestyle, environment – not bad luck’
A study published in the journal Science in January, had suggested that the majority of cancer cases are down to “bad luck.” In that study, Johns Hopkins researchers claimed 65% of cancer cases are a result of random DNA mutations, while the remaining 35% of cancer cases are explained by a combination of these mutations and environmental and hereditary factors. According to new research published in the journal Nature overall findings indicate that lifestyle and environmental factors account for around 70–90% of cancer cases, while intrinsic factors account for around 10–30% – findings that highly contradict those of the Science study.

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