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Life can be sweeter if you cut out the sugar

Giving up sweets and avoiding vitamins could help you live longer, German researchers said. They found that restricting glucose a simple sugar found in foods such as sweets that is a primary source of energy for the body set off a process that extended the life span of some worms by up to 25 percent.

The key was boosting the level of 'free radicals' unstable molecules that can damage the body and which people often try to get rid of by consuming food or drinks rich in anti-oxidants such as vitamin E, they said in a study.

Restricting glucose first spurred the worms to generate more free radicals, but then they quickly built up long-lasting defenses against them, said Michael Ristow, who led the study.

The body needs glucose, but taking in too much was unhealthy, Ristow said.

Scientists have long known that restricting calorie intake in worms and monkeys increases longevity, and the study narrowed that idea further, to glucose. The study also for the first time points to a possible reason why antioxidants long thought to promote health might do more harm than good, Ristow said.

The German team used a chemical that blocked the worms' ability to process glucose in a treatment that extended their life span by up to 25 percent, the equivalent of 15 years in humans.

The worms unable to depend on glucose increased energy power sources in certain cells for fuel. That activity produced more free radicals, which in turn generated enzymes that strengthened long-time protection against the harmful molecules, Ristow said.

However, antioxidants and vitamins given to some worms erased these benefits by neutralising free radicals and preventing the body from generating the defenses, Ristow said. "These latter findings tentatively suggest that the widespread use of antioxidants as human food supplements may exert undesirable effects," the researchers wrote.

Source: Daily Times

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