Professor Cynthia Kenyon, whom many experts believe should win the Nobel Prize for her research into aging, has discovered that carbohydrates directly affect the genes that govern youthfulness and longevity.
By tweaking the genes of roundworms, she has been able to help them live up to six times longer than normal. One of the most interesting details of her findings is that not only did the roundworms live up to SIX TIMES longer than normal, but they kept their health and youthful vigor until the end.
The genes that controlled aging in worms also do the same thing in rats and mice, probably monkeys, and there are signs they are active in humans, too. She found that turning down the gene that controls insulin in turn switches on another gene which acts like an elixir of life.
Insulin is in fact a major accelerant of the aging process, and also affects many bodily processes, all of which can impact your longevity. For example, insulin: Alters the expression of numerous hormones, stimulates your sympathetic nervous system, and promotes vasoconstriction.


ELEVATED INSULIN LEVELS- THE LEADING CAUSE OF PREMATURE AGING AND PREMATURE DEATH.
Increased insulin and leptin receptor sensitivity have clearly become the leading candidates for premature death. This results from two pry conditions: Excessive amounts of sugar/grains and processed foods, combined with insufficient exercise.
Previous studies have also found that diets high in sugar and grains are the pry culprit of obesity, and that leanness (more so than food restriction in general) is a key contributor to a long life. One such study was published in 2003 in the journal Science. This elegant study from Harvard confirms that insulin is the major mechanism thru which this result is mediated.


REF: www.mercola.com

FRUCTOSE WRECKS YOUR HEALTH AND KILLS YOU PREMATURELY.
Aside from grains, fructose, typically in the fomr of high fructose com syrup(HFCS), is perhaps the absolute worst dietary culprit as it:Destroy your insulin sensitivity, metabolizes into fat far more readily than other sugars, causes glycation and inflammation, which speedsup the aging process.

We now knowthat fructose is a primary contributor to:insulin resistance and obesity, elevated blood pressure, triglycerides, and LDL (bad cholesterol), Cardiovascular disease, Liver disease, Cancer, Arthritis, and Gout.

So a very important point is that if you take two animals and you feed one fructose and feed the other one the exact same number of calories but give it as dextrose or glucose, it's only the fructos-fed animal that will develop obesity, insulin resistance, fatty liver, and high triglycerides, signs of inflammation, vascular disease, and high blood pressure"

This bears out in humans as well. Over the last 20 years, we've seen a dramatic increase in fatty liver disease thruoghout the world, and studies done by Dr.Richard Johnson and a group of researchers at Duke University showed that people who develop fatty liver drink a lot more soft drinks, and ingest far more fructose than the average person in the community.

Ref:www.mercola.com