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Scientists have long passionately debated why cells don’t stay vigorous forever. Research in mice, fruit flies, worms and other lab organisms has turned up many potential causes of aging. Some experts blame aging on the corrosive capability of chemically reactive oxygen molecules or “oxidants” churned out by mitochondria inside cells. DNA damage, including the shortening of chromosome endcaps (called telomeres) is also a prime suspect. Chronic, low-grade inflammation, which tends to get worse the older people get, cheap jordans , wreaks so much havoc on tissues that some researchers believe it is aging’s prime cause, cheap air jordans , referring to aging as “inflammaging.” All these things and more have been proposed to be at the root of aging. Some researchers, like UCLA’s Steve Horvath, view aging as a biological program written on our DNA. He has seen evidence of a biological clock that marks milestones along life’s path. Some people reach those milestones more quickly than others, making them older biologically than the calendar suggests. Others take a more leisurely stroll, http://cheapjordansstock.com , becoming biological youngsters compared with their chronological ages. Many others, cheap real jordans , including Richard Miller, a geroscientist at the University of Michigan, cheap Authentic jordans , deny that aging is programmed. Granted, cheap jordan shoes , a biological clock may measure the days of our lives, but it’s not a ticking time bomb set to go off on a particular date. After all, humans aren’t like salmon, which spawn, age and die on a schedule. Instead, cheap wholesale jordans , aging is a “by-product of running the engine of life,” says biodemographer Jay Olshansky of the University of Illinois at Chicago. Eventually bodies just wear out. That breakdown may be predictable, cheap jordans for sale , but it’s not premeditated. http://users.atw.hu/as...rum_topic&topic=10493 http://forum.cacaoweb.....msg579470.html#msg579470 http://www.azull.info/...mp;view=article&id=62 |