This is mentioned in the article, as well of some possible explanations why replication was not possible. My personal favorite is:
"The University of Wisconsin’s control monkeys were allowed to eat as much as they wanted and were fatter than those in the aging institute’s study, which were fed in amounts that were considered enough to maintain a healthy weight but were not unlimited."
> This would seen to suggest that although
> caloric restriction may not prolong life, an
> all-you-can-eat diet may shorten it.
This is basically what I came to post. A calorie restricted diet may not prolong life compared to a healthy, normal weight, but obesity certainly cuts lifespan short through a plethora of health issues.
"The University of Wisconsin’s control monkeys were allowed to eat as much as they wanted and were fatter than those in the aging institute’s study, which were fed in amounts that were considered enough to maintain a healthy weight but were not unlimited."