Question re: IF

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One packet is 10 calories with 2g net carbs. My question is whether 5 calories and 1g net carbs breaks the fast?

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Yes but it doesn't matter

There isn't some magical thing that's happening on a 12-20 hour fast (despite what the hype says).

The main reason to avoid the calories is that it SOMETIMES can "open the door" and make you want to eat more (I experience this pretty often). That might be psychological or it might be physiological. Not sure. Regardless, I tend to do better with all or nothing. When I'm fasting, I don't want any calories at all. Once I take in some calories, then my fast is "over" from a psychological perspective and I have a hard time maintaining it for longer.

As others said, though, IF is mainly just a method to achieve calorie restriction. Now, if you start doing longer fasts (48-72 hours), then there is some research for potential benefits beyond just the calorie restriction... and yes... those calories will negate those benefits.

I don't think autophagy happens with a tradition 16-24 hour IF duration. My understanding is that you need to fast longer (over 24 hours) to really get into autophagy.

There's no use. I've tried on another thread.

Autophagy is "overrated"? What does that even mean?

Autophagy is one of the primary benefits to calorie reduction and fasting. I don't do the things I do strictly to look good naked. I do them to extend the years of quality life I have, mentally and physically.

And yes, autophagy has been shown in multiple studies (you can do your own research) to occur during IF.

Blood glucose reduction and increased lipid metabolism are other benefits.

Yes, calorie restriction also helps in these areas without IF, but the evidence points to increased benefits with the addition of fasted periods.

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Yes, calorie restriction also helps in these areas without IF, but the evidence points to increased benefits with the addition of fasted periods.

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What is the impact of the increased benefits though? 1%? 5%? I do agree with you that autophagy has benefits, but not really in 16 hours. I IF too for the most part, but I don't think it's a magic bullet. If I wanted to real benefits of fasting, I'd do 24-72 hour fasts.

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The effect of fasting or calorie restriction on autophagy induction: A review of the literature

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Despite the importance of autophagy, the evidence connecting fasting or CR with autophagy promotion has not previously been reviewed. Therefore, our objective was to weigh the evidence relating the effect of CR or fasting on autophagy promotion. We conclude that both fasting and CR have a role in the upregulation of autophagy, the evidence overwhelmingly suggesting that autophagy is induced in a wide variety of tissues and organs in response to food deprivation.

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LINK

So it would seem any caloric restriction will do it. I'm not even sure if being given the same caloric intake over a 48 hr period (24hr fast + feeding day) wouldn't net an equal outcome vs two 16/8 IF days vs 2 days of 3 meals a day.

basically what it boils down to is eating less to lose weight and you live longer.

What I think LSU777 meant by autophagy being overrated is that the body is constantly doing what it is supposed to and minor increases by CR or fasting are negligible.

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f is nothing more than a strategy to control calories and Im saying that as someone who does IF.

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. I’m new to IF, so I’m still learning about it. What is the typical length of your fasts? Or what is typical longest fast you do in a given week?

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You know nothing of my background and you know with almost 100% certainty? Checks out. You’re clearly a scientific mind.

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You still aren’t providing any studies or research to back your claims

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You know nothing of my background and you know with almost 100% certainty? Checks out. You’re clearly a scientific mind.

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Don't need to know to know what the studies say. Like I said, provide a peer backed study, meta analysis