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  #1   ^
Old Wed, Nov-12-03, 12:31
NickFender NickFender is offline
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Plan: atkins
Stats: 283/250.5/190 Male 6' 1"
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Location: Pacific NW
Default Slashing calories for longer life

Slashing calories: Can it really lengthen your life?

By Julia Sommerfeld
Seattle Times staff reporter

Before taking up his fork, Micky Snir eyes his dinner plate solemnly, as if his life depends on it. In fact, that's what he's counting on.

It's his 38th birthday and his indulgence at Claim Jumper, a Redmond restaurant known for towering stacks of barbecue ribs, is a salmon fillet with the breading scraped off. He eats only part of the fish but dives into the side of steamed vegetables, more in keeping with the Spartan diet he's followed for two years.

The Microsoft software engineer figures that by subsisting on about 2,000 calories a day nearly 30 percent less than recommended for a man as active as he is he will tack an extra 15 years onto his life. "I think of it as a living savings account. Instead of eating everything I want now, I save calories so when I'm old I get to live a few more years," he says.

It's a brand of dietary providence foreign to the typical tubby American. But Snir is no crackpot. His regimen has 70 years of science behind it.

Study after study in worms, flies, spiders, guppies, yeast, mice and rats shows slashing calorie intake by about 30 percent lengthens life span by about the same percentage. If the strategy works in humans, that would translate into as many as 20 extra years for people. Not only do critters live longer, calorie restriction, or CR as it's known among rodent-starving scientists, also appears to be a panacea for age-related ills. It staves off diabetes, high blood pressure, heart disease, cancer and Alzheimer's.

Some longevity researchers say he's making a pretty safe bet; skeptics wisecrack that he'll certainly feel like he's living longer.

"As if we haven't heard that one before," says Brian Delaney, 40, who runs the Calorie Restriction Society, an online support group for about 1,000 followers of the diet. An American living in Stockholm, Sweden, Delaney has experimented with degrees of CR for a decade, hitting as low as 1,400 calories a day. Now he eats 1,800 calories, which leaves the 5-foot-11-inch man a wispy 135 pounds.

He grumbles that calorie restriction has gotten a bad rap; followers have been lumped with cloners, corpse-freezers and other life-extension "cults." Who's crazy, he asks: baby boomers who spend billions on antioxidants, human-growth hormone injections and $50 wrinkle creams, all with no scientific basis? Or calorie counters who've chosen the "only anti-aging approach backed by mainstream science?"

Diet like hibernation

Scientists don't know exactly how CR lengthens lives, but they know it goes beyond the mere health benefits of being thin. They compare it to hibernation; physical processes that cause wear and tear on the body are drastically slowed.

One leading theory says it works by curbing cellular pollution. When cellular "factories" convert food to energy, they release byproducts known as free radicals. These biochemical ruffians wreak havoc on cells, genes and tissues and have been blamed for age-related changes ranging from crow's-feet to increased cancer risk. When a body metabolizes fewer calories, it's like a car that uses less fuel there's less free-radical pollution.

CR also may reduce levels of sugar in the blood, suppress hormones that promote cell growth and rouse genes that promote longevity. Any or all of these factors could play a part in slowing the aging process.

Researcher Mark Mattson's pet theory is the "healthy stress" hypothesis. A neuroscientist at the National Institute on Aging (NIA) in Baltimore, Mattson showed CR protects mouse brain cells from developing Alzheimer's and Parkinson's diseases. He also found that feeding mice every other day extended their lives as much as slashing total calories, even though the mice gorged themselves on feeding days. He took this to mean that hunger, whether temporary or chronic, subjects the body to a healthy form of stress that makes cells hardier. Think of the cardiovascular benefits of wind sprints. Now Mattson is about to test what happens when people eat all their food in a four-hour period and fast the rest of the day.

Mattson, a slight 120 pounds at 5 feet 9 inches tall, skips breakfast and has been counting calories since he began studying CR 20 years ago. He does it not to live longer but because he's convinced it reduces the risk of dreaded diseases.

Research under way

Whether calorie restriction extends human life poses a formidable research question. To prove it would require closely following the dietary intake of hundreds or thousands of people for decades. And that assumes subjects would agree to stick to a deprivation diet.

Despite the challenges, the NIA is taking the first step with three pilot studies across the country. The one-year studies will first test whether a 30 percent restricted diet is doable and safe for a few hundred volunteers. Sneaking ice cream won't work; researchers are using a metabolic test to determine exactly how many calories people eat.

Dr. Evan Hadley, an NIA associate director spearheading the research, says they also will examine markers such as blood-sugar levels, blood pressure and free radicals. "The studies won't tell us if calorie restriction makes people live longer but it should give us a clue if the immediate effects in humans parallel what we see in mice," he says.

The best evidence may come instead from our branchmates on the evolutionary tree. In a laboratory in Poolesville, Md., about 75 monkeys are on a 30 percent restricted diet; another 75 eat as much as they like. The NIA study is in its 16th year and captive monkeys usually live about 25 years, so it's too early to tell if CR will lengthen their lives. But tests already hint at positive trends, including healthier hearts and less cancer among the hungry monkeys.

In the absence of human or even final monkey results, scientists are split on whether CR is a reasonable step for humans. Mattson says as long as people commit to the daunting task of getting all their vitamins and minerals despite eating less, he thinks it's a healthy diet.

Dr. Itamar Abrass, head of geriatrics at Harborview Medical Center, isn't so sure. "I think there's a benefit in humans; I'd be surprised if there wasn't," he says. But the devil could be in the details, he says.

Without human studies, no one knows when to start or stop the regimen. Starting before sexual maturation could stunt reproductive development, but waiting too long could reduce the payoff.

And while CR may make for a slender, healthy 30-year-old, it may make for an excessively frail elderly person.

People who are already doing CR are "truly experimenting on themselves," Abrass says. "That's OK, but I certainly wouldn't recommend it."

Diet downsides

Even for a diehard like Snir, the diet has downsides; severe hunger pangs and a lowered libido top the list. His hands are sometimes so cold he has to wear gloves while working on the computer. And he's often low on energy. The biggest sacrifice, he says, was giving up mountain biking because it demanded too much energy. Oh, and then there's cheesecake, which he speaks of wistfully.

But Snir, at 5 feet 10 inches tall and 170 pounds, has managed to avoid the gaunt appearance and weakened bones typical of his CR brethren by eating a lot of protein powder and lifting heavy weights. And he is undeterred. Even if he's hit by a bus tomorrow, forgoing French fries will have been worth it, he says. After battling his weight for most of his adult life, the diet helped him drop 30 pounds. Plus, striving for a longer life, he says, made him realize he'd better make it a life worth living so he began spending more time with his wife and kids.

His wife, Adi, feeds herself and their four young children a diet full of grains and vegetables, but she doesn't count their calories. She takes Micky's aspiration to live longer as a compliment: "It must mean he likes the life he has with me."

She knows how his regimen must look to outsiders. He weighs nuts and doles them out of pill bottles to make sure he's eating the right amount of protein, and he dines at precisely 10 a.m., 2 p.m., 6 p.m. and 10 p.m. He once barged into the kitchen of an exasperated dinner-party host and grabbed morsels off the stove when a meal wasn't served promptly.

The fact that Snir has stuck with any diet this long, much less one so stringent, sets him apart from most. Knowing how difficult the diet is, many scientists are studying calorie restriction hoping to uncover an age-defying mechanism they can exploit the profitable way with a pill. No aging cure appears likely within a decade, but already scientists have identified a molecule in red wine that mimics the effects of CR in yeast. They've also spied a gene that seems to change when faced with too-few calories.

But Snir, an ascetic at heart, pooh-poohs the search for a magic pill. "It's like those commercials with the belts that are supposed to shock your belly and give you abs," he says. "Quick fixes never work. People need to be willing to make an effort to make their own lives better."
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  #2   ^
Old Wed, Nov-12-03, 13:45
Angeline's Avatar
Angeline Angeline is offline
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Plan: Atkins (loosely)
Stats: -/-/- Female 60
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Location: Ottawa, Ontario
Default

This reminds me of an old joke. Man walks in a doctor's office and says :

"Doctor I want to live to be an hundred years old".

The Doctor says, "It's simple: no alcohol, no fattening food, no sex."

"If I do this, I will live to be a hundred ?", the patient ask.

"No", answers the Doctor, but it will sure feel like it.
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  #3   ^
Old Wed, Nov-12-03, 14:17
Hellistile's Avatar
Hellistile Hellistile is offline
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Posts: 2,540
 
Plan: Animal-based/IF
Stats: 252/215.6/130 Female 5'4
BF:
Progress: 30%
Location: Vancouver Island
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This guy shows typical signs of an eating disorder. Sounds to me like even if he lives to be 120 years old he will be suffering the entire time. I would rather whatever years are left to me be healthy, happy, good-quality years.
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  #4   ^
Old Wed, Nov-12-03, 14:40
adkpam's Avatar
adkpam adkpam is offline
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Posts: 2,320
 
Plan: Atkins
Stats: 185/151/145 Female 67 inches
BF:
Progress: 85%
Location: Adirondack Mountains, NY
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I KNOW I couldn't do it. I was cranky enough eating low fat, much less low everything.
Gee, though, he's having salmon & scraping off the breading...sound familiar?
Dr. Atkins postulated that his eating plan would ALSO stave off premature aging (we can't live longer than we are programmed for, bottom line) by reducing the level of sugar in the blood...sounds like a good deal to me.
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  #5   ^
Old Wed, Nov-12-03, 15:26
Colleen1's Avatar
Colleen1 Colleen1 is offline
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Posts: 238
 
Plan: Atkins
Stats: 235/145/130 Female 64 inches
BF:
Progress: 86%
Location: Oregon
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the diet has downsides; severe hunger pangs and a lowered libido top the list.
__________________________________________________________________

No thanks. Ewwwww!

No sex, and almost no food? Then why bother getting up in the morning?
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  #6   ^
Old Wed, Nov-12-03, 16:25
Turtle2003's Avatar
Turtle2003 Turtle2003 is offline
Senior Member
Posts: 1,449
 
Plan: Atkins, Newcastle
Stats: 260/221.8/165 Female 5'3"
BF:Highest weight 260
Progress: 40%
Location: Northern California
Default

From some things I've read about CR it sounds very much as if the benefits may come from reducing blood glucose and insulin levels. Well, we've got that nailed.

The bit about the mice living longer if they ate every other day, even if they stuffed themselves on those days, is intriguing. Dr (Mrs) Heller of 'Carbohydrate Addicts' fame originally lost a great deal of weight by eating only one meal per day, and she ate whatever and however much she desired. Hmmmm.
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  #7   ^
Old Thu, Nov-13-03, 12:08
adkpam's Avatar
adkpam adkpam is offline
Senior Member
Posts: 2,320
 
Plan: Atkins
Stats: 185/151/145 Female 67 inches
BF:
Progress: 85%
Location: Adirondack Mountains, NY
Default

Maybe it IS all about reducing blood glucose and insulin levels, however you do it.
So if we are right, and these low carlorie guys (why no women? Interesting...) are wrong...boy, will they be the unhappy ones in the senior citizen line...
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  #8   ^
Old Thu, Nov-13-03, 12:45
ysabella's Avatar
ysabella ysabella is offline
Don't Call Me Sugar
Posts: 4,209
 
Plan: Atkins
Stats: 293/287/230 Female 65 inches
BF: :^( :^| :^)
Progress: 10%
Location: Auburn, WA
Lightbulb I read this too

I think maybe these people are just an ascetic type, and like to deny themselves of things. They feel it's righteous and they get some enjoyment out of it. In earlier times, perhaps they would become monks, choosing some sect that denies itself a lot.

Whereas we here in LC land are the hedonists!

I just read this joke on another board and had to share:
Quote:
I recently picked a new primary care physician. After two visits and exhaustive lab tests, he said I was doing "fairly well" for my age. A little concerned about that comment, I couldn't resist asking him, "Do you think I'll live to be 80?"

He asked, "Well, do you smoke tobacco or drink beer?" "Oh no," I replied. "I've never done either."

Then he asked, "Do you eat rib-eye steaks and barbecued ribs?" I said, "No, I've heard that all red meat is very unhealthy!"

"Do you spend a lot of time in the sun, like playing golf?" he said. "No, I don't," I said.

He said, "Do you gamble, drive fast cars, or fool around?" "No," I said. "I've never done any of those things."

He looked at me and said, "Then why do you give a sh*t if you live to be 80?"

Last edited by ysabella : Thu, Nov-13-03 at 12:56.
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