A new blood test soon to be launched in the United Kingdom claims to be able to tell you how long you are going to live. The £435 ($700) test measures the length of a person's telomeres - the inventor claims this is associated with longevity. Telomeres are DNA sections that cover the end of chromosomes, effectively protecting them from damage and loss of cell function - which are said to be associated with aging.
http://www.medicalnewstoday.com/articles/225648.php