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Want to live to be 100? Here’s what experts recommend

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Nir Barzilai, the director of the Institute for Ageing Research at the Albert Einstein College of Medicine in the Bronx, has studied the lives of hundreds of centenarians, the people they’ve married and their kids. The children of centenarians are “about 10 years healthier” than their peers, Barzilai said.

Barzilai is working with others to enroll 10,000 centenarians, their children and a control group from the general population to identify the different genes that contribute to a long life. People who have a certain mutation on their growth hormone, for example, are “very likely to live longer” because their cells spend more energy on maintaining existing cells, not growing new ones, Barzilai said.

The plan is to use artificial intelligence to help find the genes and develop drugs from them, he said.

“We really want to find all the longevity genes,” Barzilai said.

Olshansky said he and his colleagues are preparing to launch a platform in February where people can upload data from a genetic testing service to identify whether they have genes “associated with exceptional longevity,” so they can plan financially for retirement.

“I’m a carrier, for example, of two sets of genes that are associated with longevity,” Olshansky said. “For planning purposes, I probably need to delay retirement.”

Environment and lifestyle count

Experts disagree on how much genetics influence a person’s life span vs. their lifestyle. But most experts say that good genes will only get you so far.

Jamie Justice, an assistant professor of gerontology at Wake Forest University, says some research has suggested that genetics account for around 25 per cent of longevity. The other 75 per cent relates to your environment – where you live, what you eat, how often you exercise and your support system through friends or family.

Good genes will only get you so far – where you live, what you eat and how often you exercise is also important. Credit:Getty Images

For those of us who are not endowed with a set of promising genes, the goal isn’t to push the boundaries of human life expectancy, Justice said. Instead, researchers want to figure out how people can have full, healthy lives with the time they have.

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“The goal isn’t necessarily to live to 118 years. It’s to live well within those years,” Justice said. “What individual things do we do that we can really harness our health and live healthier within the years given?”

And, Justice said, a good public health system “can’t be undersold.” If you have a better health-care system, you’re going to have a higher life expectancy, she said.

And location matters, too

The United States and Japan have the most confirmed centenarians and supercentenarians, people who live to be 110 years old or older; and, Japan has the most per capita, according to Robert Young, the director of supercentenarian research at the Gerontology Research Group.

But, there are probably more centenarians and supercentenarians we don’t know about. More than 110 years ago, certain countries were better at creating and preserving birth certificates or hospital records, Young said. A country’s record-keeping a century ago is often the factor determining where confirmed supercentenarians are reported across the world, he said.

“People need to remember that when we’re looking at human longevity today, we’re actually looking more at the state of the world 110-plus years ago,” Young said.

Beyond record-keeping, where someone lives – a war zone, a place with access to quality health care, a country with a lot of pollution, a developed nation where people sit a lot – probably plays a significant role in longevity.

Researchers have recently found “the stress of life directly affects some of the biological mechanisms of ageing,” said Ferrucci, adding that our exposure to various types of pollution can harm our overall health, as well. He called the topic an “expanding area of research” that could revolutionise how we approach public health.

“We are discovering that the secret of good health is not only in our behavior but it’s also in what our society does to enhance the health of our population,” Ferrucci said.

And, from studying centenarians, Ferrucci said researchers have found that healthy older adults tend to be remain physically active, spend time outside and have strong connections with their friends and family.

“Just walking outside,” makes an enormous difference, Ferrucci said.

“If I had a jewel to give to people who want to live long and well, I would tell them to get up early in the morning and go out,” Ferrucci said. “That is really the best gift that you can give yourself if you want to achieve longevity.”

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Still, Ferrucci said centenarians and especially supercentenarians are often “unique.” Some people have this “biological resilience” to live a long life despite everything going against them.

“There’s the curve of mortality that characterises the general population and then there are these individuals that are unique singularities,” Ferrucci said. “We don’t know how and that is the great secret.”

Experts say the usual advice of regular exercise and eating healthy food applies generally to all aging adults, but for a few centenarians, there are exceptions to the rule. Barzilai once visited a centenarian, and when she opened the door, she was smoking a cigarette.

“I said, ‘Helen, nobody told you to stop smoking?’ ” Barzilai said. “And she said, ’You know, the four doctors who told me to stop smoking? They all died.”

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