By: Michael Stevens - Staff Writer
Published: May 17, 2021

Blood Test How Long You Live

Blood Test How Long You Live - If there was a test to determine how long you life for, would you take it? Researchers in Spain say they can find out your expiration date from a simple blood test. They are very close to marketing a genetic test that could tell consumers how fast they are aging.

The blood test works by measuring the length of an individual’s telomeres, or caps on the tips of chromosomes that protect the chromosomes from damage.

Telomeres are thought to play a role in aging, and previous studies have found an association between telomere length and lifespan.

The test would tell an individual if their “biological age” — the age of their cells — matches their chronological age. This information, in turn, might tell a person how many years of his or her life remain. The researchers hope to market their test to the general public later this year, sold by the company Life Length.

However, experts argue that the scientific understanding of telomeres is not at the point where such a test would be accurate. We know telomere length changes with age, said Carol Greider, a geneticist at John Hopkins School of Medicine in Baltimore who studies telomeres. But in the general population, the length of people’s telomeres varies widely.

For example, a 20-year-old and a 70-year-old might have telomeres that were the same length, Greider said. “We cannot tell how old a person is by looking at their telomeres,” she said. “I would say that it is not possible to tell a persons ‘biological age’ from their telomere length,” she said.


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