What is Intermittent Fasting
May 12th, 2011Intermittent fasting is a style of eating that makes aimed at making calorie restriction easy and is quickly gaining popularity simply because it works so well for many people. It involves refraining (fasting) from food from short periods lasting 16-24 hours.
Because of the simplicity behind Intermittent Fasting, it is promoted as an anti-calorie counting diet.
Intermittent fasting is not concerned with nutrient partitioning like Zone style diets, low fat foods, or low carb like Atkins.

Can you say Zoolander? Maybe a tad off-topic, but intermittent fasting is much better than the "Model Diet" of binging and purging...
There are a few popular different fasting designs. Fasts lasting from 16-24 hours are very common. Some fasting methods are more flexible in their approach by calling for only 1 or 2 days a week, and some methods involve fasting every other day (EOD), also called alternate day fasting (adf).
Ordinary fasting protocols, sometimes called cleanses, involve longer periods of fasting ranging from 3-10 days.
With intermittent fasting, you will never go a day without food. What changes is the “window” in which you eat your food.
In Brad Pilon’s ESE intermittent fasting program, you would go 24 hours without food. His program is flexible in how you apply that program by going from breakfast(7am?) to breakfast(7am) or by going from dinner(6pm?) to dinner(6pm?).
There are other methods that have smaller fasting periods like 16 hours as perpetuated by Mark over at the website Leangains. Other fasting methods include the Warrior Diet and Fast 5.
The attraction to intermittent fasting is the flexibility in food choices. It is not a restrictive diet by any means. It is hailed as a program that allows you eat many of the foods you like such as pizza, chicken wings, or [insert favorite dish here].
Even with eating your favorite junk foods, following an intermittent fasting lifestyle still lets you lose weight by helping you to decrease your calorie load by as much as 30 percent or more easier than any other dietary method.
There are also many science backed benefits. In his book Eat Stop Eat, Brad Pilon, with holds an Honors degree in Nutrition, shows relevant human studies with reports of
[+]weight loss
[+]muscle gain
[+]improved insulin sensitivity
[+]anti-aging
[+]reduced bodyfat
[+]increases in growth hormone
[+]increased alertness
[+]reduced circulating insulin
[+]reduced blood sugar
[+]reduced inflammation
[+]reduced triglycerides
All of these benefits are very important to anyone wanting lose bodyfat and greatly improve their overall health.
With popular diet programs like the ‘Zone,’ the main objective is to control insulin levels. This is accomplished through special protein, carb, and fat ratios and smaller portion meals. Many dietary methods are based on the same principle, with varying shifting of macro-nutrient balances.
The reason that most dieters aim at controlling insulin levels is important is because when there is raised insulin levels in your body, the body can’t burn bodyfat. Insulin is acts like a supermagnet to bodyfat and keeps it glued to your gut.
Most people stay too long in an insulin state, never giving their bodies a chance to subside and balance it out with growth hormone, which could be loosely translated as insulin’s counter hormone.
Insulin and Growth Hormone. Yin and Yang.
Also… losing weight on a diet really isn’t the best goal of any dieter…
Losing bodyfat should be your objective, unless you like loose skin or a “soft” look.
By utilizing intermittent fasting, you are also flipping a few metabolic switches in your body important to any dieter for real fat loss, and good muscle tone.
One of them is that fasting helps to sensitize your body to growth hormone’s fat burning abilities.
…fasting has been shown not to just release growth hormone, but also makes your body respond better to it.
See… growth hormone by itself is one thing, but your body must also respond to the signals that it gives. A fasted state helps your body hear and respond to what growth hormone has to say.
A fasted state also raises other hormones in the body that also play a key role in fat loss.
I personally had a hard time accepting the idea of doing fasting for weight loss. I instantly took it as another fad… or the “next big thing.”
If you look at all the popular diet programs in the past that quickly rose to fame, they got popular by being controversial and outrageous. I initially felt the same about intermittent fasting and didn’t even bother to give it the time of day.
I was from the school of thought that you “need” to graze all day long with a meal frequency of 5-6 meals a day to burn fat. Now… I stayed in shape with grazing, and got really lean when I weighed all my food on a scale and counted every calorie.
Many bodybuilders still get great results with grazing, it just didn’t work with my lifestyle. However, I also found eating 5-6 times a day to be extremely inconvenient.
As the idea gained more popularity, and I saw other people I trusted getting results with it, so then it was time for some investigation. I know that I have to have a solid belief in the objective science, and the people promoting the science… behind any new idea in order for me to truly get the real motivation to commit to it.
I read many blogs and personal experiences, but they did not give me the solid foundation I need to try something new and ‘exotic.’ Although the authors were certainly knowledgeable and honest, they lacked the credentials I like to see when making up my mind on health based issues.
The best non-technical, science-based, and easy to read source for intermittent fasting is Eat Stop Eat by Brad Pilon. He has the credentials, and the ability to objectively dissect scientific studies to find their true value- in any.
After reading it, I was knowledgeable, confident, and most importantly very excited to start my intermittent fasting lifestyle.
Another popular pioneer on the subject is Martin Berkhan who runs the website Leangains. His style of fasting involves 16 hour fasts, and an 8 hour eating window.
You also have the ‘Warrior Diet’ and ‘Fast 5.’
I’m sure there is more, but those are the most popular right now.
I chose Brad’s method because after I became more knowledge on the subject, I felt that a 24 hour fast was in reality… really short for a fast once I became familiar with the benefits of fasting beginning to emerge around the 18 hour mark, and continuing all the way up until the 36 hour mark.
The 24 hour mark made sense to me when considering the benefits of fasting, and a my lifestyle.
Disadvantages to intermittent fasting?
I will start by saying that short term fasting does not lower your blood sugar to dangerous levels, according to ESE. Maybe long term fasting will, but there isn’t any credible evidence of dangerously low blood sugar involved in intermittent fasting by healthy people.
Brad clearly covers the objective science of what really happens to your blood sugar when you do a short term fast, and it’s beneficial.
Major religions follow commonly known customs and timely rituals of fasting without reported incident by millions of followers.
From what I gathered, the biggest disadvantage to intermittent fasting is the initial fear of hunger, even delusions of starvation for some people.
When I tell people what I do, they cringe at the fear of hunger. Their fear is even palpable.
It’s too bad that they stop before they start.
The truth is that fasting actually helps you to control and conquer your hunger. I never would have figured that out, if I never did it.
In my first few times of short term fasting, I did get hungry approximately at the 18 hour mark. However, I stuck with it and an interesting thing happened around the 20 mark…
My hunger simply vanished… other intermittent fasters’ report the same thing. My guess is that is has to do with epinephrine and norepinephrine, which help to turn off hunger.
When my 24 hours were up and it was time to eat, I had zero desire to ‘pig out.’ My meal, when I did eat, was almost too filling. I also had a general sense of well being.
I did two fasts a week, and the same scenario happened each time I fasted with the exception that my ‘hunger window’ got shorter each time. I still get the hunger window, but it is periodic these days.
Intermittent fasting isn’t something you halfheartedly ‘try.’ You need to convince yourself first that it is beneficial for you… like the single digit bodyfat levels it helps you achieve… the fact that it just might make you a ‘retired dieter’… or the numerous anti aging benefits that you would normally have to pay boatloads of money on vitamins, hormones, drugs to get the same effects of a simple dietary change can give you.
Whatever your attraction to short term fasting, I strongly suggest you become knowledgeable on the real effects by reading some of the books mentioned in this article. When you know ‘why’ you are doing something, and have a reasonable ‘how’ to do it, it helps you get over any ‘speedbumps,’ and allows it to simply become a habit in your life.






