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Comment by 0xbear | Hacker News Reader

I've found much of his book unpersuasive. But I think he's onto something with this fasting thing, as well as with not eating snacks all the time.

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Are you talking about Obesity Code? I find it to be quite convincing, he uses many studies to debunk the calories in calories out paradigm and provides ample evidence that obesity is a hormonal problem.

Because hormones explains the ability to gain mass out of thin air.

Spoken like someone who knows literally nothing on the subject.

Lost over 100 pounds in 1.5 years after a lifetime of obesity by simply eating less and skipping meals. I've read the literature on both the medical and bro-science side. I know plenty.

If you can't lose weight, you're eating too much.

This is something I don't quite get about Jason Fung. He is critical of calorie restriction being less effective (he says you will feel more tired). But I'd like to see strong arguments and evidence for that.

Oh I don't deny I felt like shit and every moment of it sucked. But like most things worth achieving you need to put something resembling effort into it. The results were definitely worth it.

The question you need to answer is can you sustain this for the remainder of your lifespan.

The question you need to answer is can you sustain this for the remainder of your lifespan.

He doesn't have to, as he is now at his target weight. He only needs to maintain his current body weight, which isn't the same thing.

It is the same thing if he his insulin homeostasis is out of whack. It's a constant struggle in that case. That's why most people who lose weight in the short term gain it right back when they "maintain".

A thin dude at work pretty much only eats junk food and washes it down with regular coca cola, of which he drinks 3-4 cans a day. Every single day. Doesn't exercise much either. And he doesn't gain weight. For me, god forbid I eat a single donut a week, I inflate like a balloon.

He sites several studies including the Minnesota Starvation Experiment[0]. It's pretty simple, if the body gets some calories but not enough, your metabolism is lowered and you have less energy along with a host of other symptoms. This also explains why this is a terrible dieting strategy, once your metabolism is lowered you regain the weight quite fast once you start eating more.

[0]https://en.wikipedia.org/wiki/Minnesota_Starvation_Experimen...

Fung's theory prescribes exactly what you did. Eat unprocessed foods, don't eat too much, don't snack all the time, skip breakfast, fast 24-36 hours every now and then. Whether or not you get fat is largely determined by insulin levels and homeostasis. Insulin level is elevated in obese people due to insulin resistance. Fasting and not snacking (and skipping breakfast) help reset insulin "thermostat" to within normal range and maintain it through relatively minor lifestyle adjustments.

Yes, eating too much food can cause weight gain. That is also the simplest and least helpful view that exists. It certainly does not explain how some people can gain weight with a calorie deficit and some people can loose weight on a calorie surplus.

By the way "skipping meals" (aka fasting) is exactly what Dr. Fung recommends to lose weight. Fasting drops your insulin levels and gives your body a chance to burn its stored fats.

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