Some critics say more research is needed to prove that calorie restriction extends life in monkeys.

VOA: special.2009.09.01

Scientists first studied the effects of calorie restriction on aging in the nineteen thirties.

VOA: special.2009.09.01

They tested the effects of calorie restriction in seventy-six rhesus monkeys over twenty years.

VOA: special.2009.09.01

They help the tumor continue growing without restriction.

VOA: special.2010.06.01

Richard Weindruch explains. "Our data show that there is about a three-fold higher risk of developing a disease of aging in those animals fed the normal diet as opposed to those that have been on caloric restriction since they were adults."

VOA: special.2009.09.01

For Hamas leaders, this is,in some ways, a bigger victory than persuading Israel to lift its restriction on goods entering the territory.

VOA: standard.2010.06.16

The president refers to his proposed restriction on risky behavior as the "Volcker Rule."

VOA: standard.2010.01.21

The loss of jobs and business opportunities has perhaps been more damaging than the restriction on imports, especially for those who under the blockade - cannot cross into Israel.

VOA: standard.2010.06.16