I had to chuckle the other day when
I saw a page posted by Mark Gibbons, a member (as I am) of the Jason Fung Fan
Club Fasting Support page on the net. The full quote was, “I DON’T ALWAYS SKIP
MEALS…BUT WHEN I DO IT’S FOR DAYS AND DAYS AND DAYS.” Brilliant, as the Brits
say. It’s an allusion, of course, to “The Most Interesting Man in the World”
meme made famous by the TV commercial for Dos Equis beer some years ago.
This beer commercial has been
parodied hundreds of times. What I liked about this one in particular is that
is captures the essence of Extended Fasting, a practice that is
gaining a small but very devoted
following. The reason for the devotion is that, to virtually everyone’s
surprise, it works for losing weight,
and it’s sooo easy.
Extended Fasting means for two or three consecutive days taking
little or no nourishment by mouth. I prefer the term Extended Fasting to
Intermittent Fasting which first gained currency and apparently includes other
types of fasting: 16:8, One Meal a Day (OMAD), 5:2, and various other forms
such as Alternate Day fasting. In my opinion all of them are understandable
attempts to deal with the fears and uncertainties of abstaining from eating for
an extended time. From time to time I’ve tried them all for weight loss, with
mixed results.
I can attest, however, to the
efficacy of Extended Fasting. I
transitioned to it last spring when I was living alone for two months. I wanted
to gin myself up to start it and avoid the flack I knew I would get from my
wife if she were here. It was suggested to me the previous fall by Megan Ramos,
Director of the Intensive
Dietary Management program in Jason Fung’s office in Toronto. I told her I
would start with Alternate Day fasting.
I had already been eating Very Low
Carb (since 2002), so I was keto- or at least fat-adapted. That meant that,
without taking nourishment by mouth, I would immediately transition into
burning body fat without hunger.
Alternate day fasting worked so well I quickly transitioned to consecutive day,
first two and then three-day. I know I could easily have gone four days, or
five or more. Our social calendar simply doesn’t permit it, for now.
The metabolic mechanisms at play
here are simple. The hormone insulin is the central (but not the only) player.
It has at least two roles. The first is to transport glucose from digested
carbs and other sources (such as gluconeogenesis) to the cells where it is
supposed to open up receptors there to allow the energy in. Insulin Resistance
in type 2s and pre-diabetics slows down and blocks that uptake.
The 2nd mechanism is
that when glucose levels drop, after the glucose has been taken up and/or when
few carbs have been taken by mouth, blood insulin levels drop. This sends a
signal to the liver to switch fuels
from glucose to fat. That’s
what body fat is for, a backup energy source. But fat stores are only accessible when your blood insulin level
drops. And that’s more
difficult for people who have Insulin Resistance (type 2s and pre-diabetics) because with IR, as your glucose continues
to circulate, blood glucose and insulin levels stay high!
That’s why Extended Fasting works
for weight loss. When you eat nothing to speak of, and especially don’t eat
carbs, particularly if you are already fat-adapted, you body transitions to
burning body fat for energy, and you’re not hungry. You can literally
go for days on end with no hunger, high
levels of energy, and a feeling of being “pumped.”
I started at 375 pounds in 2002.
Over the years I lost 170 pounds following a Very Low Carb (VLC) diet. Like
most, however, I regained some (45 pounds). When I started Extended Fasting my
goal was to lose 63 pounds, to reach 187 pounds, thus becoming “Half the Man I Once Was.” With Extended Fasting,
it took 8 months, but I did it. But I’ve now regained some again, so my new goal is
less ambitious. It is to get to 195 and stay below 200.
As the commercial ended with, “Stay
thirsty, my friends,” so I end this post with, “Stay thin, my friends, with…
Extended Fasting.” To maintain 195, I plan to eat VLC/OMAD and one or two day
fasts, when and as needed.