Wednesday, March 6, 2013

England Develops a Voracious Appetite for a New Diet

[ed. I stumbled onto a similar diet in college and lost 60 lbs. over the course of nine months. Except my diet was reversed: 1500 calories/day for five days; anything I wanted on the weekends (Friday night to Sunday night). The body adjusts by reducing its appetite; in my case, permanently.]

Visitors to England right now, be warned. The big topic on people’s minds — from cabdrivers to corporate executives — is not Kate Middleton’s increasingly visible baby bump (though the craze does involve the size of one’s waistline), but rather a best-selling diet book that has sent the British into a fasting frenzy.

The Fast Diet,” published in mid-January in Britain, could do the same in the United States if Americans eat it up. The United States edition arrived last week.

The book has held the No. 1 slot on Amazon’s British site nearly every day since its publication in January, according to Rebecca Nicolson, a founder of Short Books, the independent publishing company behind the sensation. “It is selling,” she said, “like hot cakes,” which coincidentally are something one can actually eat on this revolutionary diet.

With an alluring cover line that reads, “Lose Weight, Stay Healthy, Live Longer,” the premise of this latest weight-loss regimen — or “slimming” as the British call “dieting” — is intermittent fasting, or what has become known here as the 5:2 diet: five days of eating and drinking whatever you want, dispersed with two days of fasting.

A typical fasting day consists of two meals of roughly 250 to 300 calories each, depending on the person’s sex (500 calories for women, 600 for men). Think two eggs and a slice of ham for breakfast, and a plate of steamed fish and vegetables for dinner.

It is not much sustenance, but the secret to weight loss, according to the book, is that even after just a few hours of fasting, the body begins to turn off the fat-storing mechanisms and turn on the fat-burning systems.

“I’ve always been into self-experimentation,” said Dr. Michael Mosley, one of the book’s two authors and a well-known medical journalist on the BBC who is often called the Sanjay Gupta of Britain.

He researched the science of the diet and its health benefits by putting himself through intermittent fasting and filming it for a BBC documentary last August called “Eat, Fast and Live Longer.” (The broadcast gained high ratings, three million viewers, despite running during the London Olympics. PBS plans to air it in April.)

“This started because I was not feeling well last year,” Dr. Mosley said recently over a cup of tea and half a cookie (it was not one of his fasting days). “It turns out I was suffering from high blood sugar, high cholesterol and had a kind of visceral fat inside my gut.”

Though hardly obese at the time, at 5 feet 11 inches and 187 pounds, Dr. Mosley, 55, had a body mass index and body fat percentage that were a few points higher than the recommended amount for men. “Given that my father had died at age 73 of complications from diabetes, and I was now looking prediabetic, I knew something had to change,” he added.

The result was a documentary, almost the opposite of “Super Size Me,” in which Dr. Mosley not only fasted, but also interviewed scientific researchers, mostly in the United States, about the positive results of various forms of intermittent fasting, tested primarily on rats but in some cases human volunteers. The prominent benefits, he discovered, were weight loss, a lower risk of cancer and heart disease, and increased energy.

“The body goes into a repair-and-recover mode when it no longer has the work of storing the food being consumed,” he said.

by Jennifer Conlin, NY Times |  Read more:
Photo: Jonathan Player