LinkThe CRON diet -- a calorie restricted, optimal nutrition eating plan designed to extend human life -- is not for everybody. And Roy Walford, MD, a professor emeritus of pathology at the University of California, Los Angeles, and longtime researcher in aging, is the first to admit it. "It is rather difficult and only some people can do it," says the author of Beyond the 120-Year Diet. "You have to be very motivated." You should also check with your doctor first.
Years of research have shown that severe calorie restriction increases the life span of rodents by 50%. For humans, Walford's idea is to eat just enough calories to maintain a body weight 10% to 25% below your "set point" -- the weight your body naturally gravitates to. There's no minimum or maximum number of calories. After all, different body types have differing requirements; the bigger and more active you are, the more calories your body will consume. But in general, most people following this diet will consume between 1,000 and 1,500 calories a day -- about half of what the average person now eats.
Scientists know that very strict low-calorie diets can prolong life. But now they report that it does not matter when you start that diet — at least if you are a fruit fly. The life-prolonging effect kicks in immediately, continues as long as the diet, and is lost as soon as the dieting stops.
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In a detailed demographic analysis of life and death among 7,492 fruit flies, published today in Science magazine, Dr. Partridge and her colleagues discovered that the protective effect of dieting snaps into place within 48 hours, whether the diet starts early in life or late. Flies that dieted for the first time in middle age were the same as flies that had been dieting their whole lives. But the effect can be lost just as quickly. Flies that dieted their entire lives and then switched, as adults, to eating their fill were the same two days later as flies that had never dieted.
Dr. Huber Warner, who directs the biology of aging program at the National Institute on Aging, said that it was as if dieting flies "put on a suit of armor."
"It seems like the dietary restriction puts the flies into a different kind of state where they are temporarily able to resist damaging events so that they survive rather than die," Dr. Warner said. "We don't know what they are resisting, but they seem to have achieved some sort of invulnerability."
Dr. James W. Vaupel, a demographer at the Max Planck Institute for Demography in Rostock, Germany, said the findings put decades of research on the effects of calorie restriction in a new light. "We've known for a long time that dietary restriction increases survival," Dr. Vaupel said. "What we haven't known is that it's never too late."
I did it for about four months when I wanted to lose weight. Yes, I felt peckish, but I just planned ahead exactly what I was going to eat and when each day, and looked forward to eating it. Worked a treat.Suezoled said:A couple weeks ago, there was a segment on 20/20 or Dateline or something about people who eat only 1200 calories worth of food a day. Anyone heard of this?
Larspeart said:well yeah, sort of. IF you can follow it 'to a T', and you don't deviate.
I'm wondering if you are going to go out and do some intense fast right now and possibly hurt yourself.
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Larspeart said:Lots of people do this. As long as you are eating more the 800 calories a day, you keep your body form going into 'starvation mode' where it conserves energy and fats and you actually gain weight (while burning muscles).
1000+ is considered safe for weight loss.
Breatharians come to mind...Larspeart said:Lots of people do this. As long as you are eating more the 800 calories a day, you keep your body form going into 'starvation mode' where it conserves energy and fats and you actually gain weight (while burning muscles).
Brian said:I'm a freak in this respect. I figure I eat about 1,000 calories a day. I have a small appetite and I'm guessing a small stomach. I eat 3/4 of a half pound cheeseburger and I'm done for 8 hours or more. I'd get sick if I ate anymore. I eat once or twice a day. I'm 6 foot and 145 lbs. Of course the 1,000 calories doesn't count the beer. I don't know if the beer counts as food.
I have a slight gut, but no other noticable body fat. I can carry 110 lbs up a flight of stairs by myself twice in a row. I rarely if ever get a cold. This is with an almost complete lack a vegatables and fruits. I eat a slice of lettuce and tomatoe on sandwiches, tomatoe sauce, corn on the cob and not much else as far as veggies go. Maybe 2 apples a year.
Lots of people do this. As long as you are eating more the 800 calories a day, you keep your body form going into 'starvation mode' where it conserves energy and fats and you actually gain weight (while burning muscles).
1000+ is considered safe for weight loss
The key is not calories, but nutrition. If you are getting all the vitamins, minerals, and water, then you can survive on surprizingly little for a very long time.
a hunger strike consisting of water, vitamins, and maybe some fruit juice could sustain a person for years.
your teeth might decay (form lack of use),