Buzz
With the rise of DNA testing kits, businesses offering to reveal your 'cellular age' from a simple blood sample have also gained significant attention.
However, these results may not always be reliable, as reported by Science News. Oncologist and Johns Hopkins researcher Mary Armanios explained to the site that these tests might cause unnecessary panic, even among perfectly healthy individuals.
"The telomere belongs in the clinic and should not be used as a form of molecular palm reading," says Armanios to Science News. She recounted the case of a man in his forties who was told his telomeres were equivalent to those of an 80-year-old. Believing his time was running out, he quit his job, sold his house, and postponed surgery, fearing it would accelerate telomere shortening.
For around $100, some companies claim they can not only determine your cellular age, but also provide guidance on how to enhance your health and potentially extend your life. They do this by measuring the length of telomeres, the protective caps at the ends of your chromosomes, which help determine your biological age. Telomeres shorten as you age, but other factors—such as diet—can also shorten them, contributing to various health issues. (Interestingly, telomeres can grow longer in space, as astronaut Scott Kelly discovered.)
However, as Science News points out, this method is not always the most reliable indicator of health or longevity. The range of what's considered 'normal' is broader than what those companies might suggest. Longer telomeres may actually be linked to a greater risk of cancer, and conversely, shorter telomeres don’t necessarily mean you’re on the verge of death.
In fact, the tests provided by these companies have a 20 percent margin of error, meaning results can vary from day to day. Not all experts agree that telomere length is a trustworthy "biomarker" of age. The National Institute on Aging concluded that aging biomarkers have yet to be scientifically validated, as reported by WIRED.
Nevertheless, research into telomere length can be highly beneficial when conducted in a lab setting. These tests can assist in diagnosing rare conditions and ensuring that patients receive the appropriate care they need.
