This Part of Your DNA Could Shorten Your Lifespan

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The length of telomeres may be the key to how fast we are aging, and they can be affected by our daily stresses. We can help build them back up, but first, what are telomeres?
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"A new study finds that the long work hours of an intern’s first year of medical residency are associated with accelerated cellular aging."
Are Telomeres the Key to Aging and Cancer
"Yet, each time a cell divides, the telomeres get shorter. When they get too short, the cell can no longer divide; it becomes inactive or "senescent" or it dies. This shortening process is associated with aging, cancer, and a higher risk of death."
Scott Kelly's Year in Space Highlights Risks to DNA and Brains
"Bailey’s team found that Scott Kelly’s telomeres lengthened. 'It’s exactly the opposite of what we thought, it was in every sample, every time point,' Bailey says. Weirder still, Scott’s telomeres shrank as soon as he landed"
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