Night shifts and jet lag fuel tumor growth, study suggests – and could make cancer treatments less effective

Shift work and jet lag may make tumors grow faster by ‘turning on’ genes, new research suggests.

Disrupting the circadian rhythms that fuel our sleeping and waking cycles may ‘turn on’ genes that encourage cancer cells to multiply and ‘turn off’ the ones that block tumor growth, according to the new University of Pennsylvania study.

That means that simply keeping sleep schedules steady may help to cut cancer risks.

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