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Technology

Blood test, offering clues on speed of aging, goes on sale

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July 29 - A blood test that determines the length of telomeres, the protective caps at the ends of chromosomes that wear down as we get old, are now on sale to the public. The researchers who developed the test say it will allow people to get a sense of how fast they are aging. Opponents say the test is too simplistic and insist that telomere length is only one factor in the aging process. Jim Drury reports.

Technology

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