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What is a ketosis fast?

Answered on August 19, 2014
Created January 19, 2012 at 7:25 PM

I've googled and I've looked here but don't see the answer: What is a ketosis fast? What would I eat and what would I not eat?

Thanks everyone. Toni

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 20, 2012
at 09:50 PM

not just the PHD people, Atkins has (had?) a similar thing called a "Fat Fast" http://livinlavidalocarb.blogspot.com/2006/09/fat-fast-for-few-days-to-induce-weight.html

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 20, 2012
at 09:46 PM

Atkins has a similar thing called a "Fat Fast" http://livinlavidalocarb.blogspot.com/2006/09/fat-fast-for-few-days-to-induce-weight.html

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 20, 2012
at 04:03 PM

Incidentally, wish they didn't use that acronym. Every time I see PHD, I think of the college degrees and what my dad used to say about the acronyms BS, MS, and PHD (he had a PHD). :)

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 20, 2012
at 04:01 PM

From what I'm seeing so far, it looks like the term is coming from the Perfect Health Diet people. I don't consider it a fast. More like intermediate fasting broken up by high fat/low to zero protein meals to help feed ketosis.

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 20, 2012
at 03:59 PM

Sounds like the PHD people are the only ones that consider that a fast.

Ed983a42344945b1ff70fd9597a23493

on January 20, 2012
at 01:27 AM

I wonder if you mean ketogenic instead of ketosis? That would imply getting all or the vast majority of your calories from fats, like Atkins' "fat fast".

Ed983a42344945b1ff70fd9597a23493

on January 20, 2012
at 01:25 AM

I wonder if you mean ketogenic instead of ketosis?

273729a18d2f18903815d2644a4d64de

(1683)

on January 20, 2012
at 01:16 AM

if anything just go out on long relaxing walks :] long walks or hikes are easy to do, low intensity, and VERY paleo.

F44b15b2fd1ad134200793d6b474fc4c

(938)

on January 20, 2012
at 01:15 AM

Thanks so much, Michelle. I like your plan -- upping protein and fat and going VLC. Due to chronic illness, I can't work out. I'm able to do some qigong for 10-20 minutes, but that's about it.

F44b15b2fd1ad134200793d6b474fc4c

(938)

on January 20, 2012
at 01:12 AM

James - I was just told by a Paleo person that because I have immune system issues that probably result from inflammation, I should try a ketosis fast (I'm been Paleo -- very strict -- since September). I just don't really know what a ketosis fast is!

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 19, 2012
at 10:45 PM

yep. in the PHD book they use the term "Long Ketogenic Fasts" (a hybrid of short fasts and ketogenic diets). There is another post on this site that also mentions a ketogenic fast http://paleohacks.com/questions/25469/is-it-possible-to-use-coconut-butter-or-milk-in-a-ketogenic-fast

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 19, 2012
at 10:40 PM

yep. in the PHD book they use the term "Long Ketogenic Fasts" (a hybrid of short fasts and a ketogenic diets). there is another post on this site that also mentions a ketogenic fast http://paleohacks.com/questions/25469/is-it-possible-to-use-coconut-butter-or-milk-in-a-ketogenic-fast

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 19, 2012
at 10:29 PM

That page sounds a bit Clintonesque to me. "It depends on what the meaning of the word 'is' is". I suspect that the majority us would agree that eating 650+ calories in a meal is not the commonly agreed upon definition of fasting...

F44b15b2fd1ad134200793d6b474fc4c

(938)

on January 19, 2012
at 09:20 PM

Ah. I think this is what was recommended to me. Thanks so much. (And to everyone who responded.)

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6 Answers

2
E91fd339d760ed76cc72570a679ebf5a

(2369)

on January 19, 2012
at 09:08 PM

There is the PHD protocol, which I think some refer to as a Ketogenic Fast. Fiber and short-chain fats (coconut oil usually):

http://perfecthealthdiet.com/?p=1296

F44b15b2fd1ad134200793d6b474fc4c

(938)

on January 19, 2012
at 09:20 PM

Ah. I think this is what was recommended to me. Thanks so much. (And to everyone who responded.)

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 19, 2012
at 10:40 PM

yep. in the PHD book they use the term "Long Ketogenic Fasts" (a hybrid of short fasts and a ketogenic diets). there is another post on this site that also mentions a ketogenic fast http://paleohacks.com/questions/25469/is-it-possible-to-use-coconut-butter-or-milk-in-a-ketogenic-fast

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 19, 2012
at 10:29 PM

That page sounds a bit Clintonesque to me. "It depends on what the meaning of the word 'is' is". I suspect that the majority us would agree that eating 650+ calories in a meal is not the commonly agreed upon definition of fasting...

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 19, 2012
at 10:45 PM

yep. in the PHD book they use the term "Long Ketogenic Fasts" (a hybrid of short fasts and ketogenic diets). There is another post on this site that also mentions a ketogenic fast http://paleohacks.com/questions/25469/is-it-possible-to-use-coconut-butter-or-milk-in-a-ketogenic-fast

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 20, 2012
at 09:50 PM

not just the PHD people, Atkins has (had?) a similar thing called a "Fat Fast" http://livinlavidalocarb.blogspot.com/2006/09/fat-fast-for-few-days-to-induce-weight.html

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 20, 2012
at 03:59 PM

Sounds like the PHD people are the only ones that consider that a fast.

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 20, 2012
at 04:03 PM

Incidentally, wish they didn't use that acronym. Every time I see PHD, I think of the college degrees and what my dad used to say about the acronyms BS, MS, and PHD (he had a PHD). :)

543a65b3004bf5a51974fbdd60d666bb

(4493)

on January 20, 2012
at 09:46 PM

Atkins has a similar thing called a "Fat Fast" http://livinlavidalocarb.blogspot.com/2006/09/fat-fast-for-few-days-to-induce-weight.html

2
96bf58d8c6bd492dc5b8ae46203fe247

(37227)

on January 19, 2012
at 08:16 PM

The confusion, I suspect, is due to using the term fasting. A distinction may be that some people consider you to be in a fast if you skip even one meal and you are certainly fasting if you don't eat for one or more days. Some people can eat little or no carbs (not technically fasting) and be in ketosis.

Ketosis simply means (to me) that I am burning ingested/stored fat (ketones) rather than ingested carbs (glucose.) So, as Jim says, I may or may not be fasting--if I were to eat zero- to very low-carbs (and I can't so I stick to moderate intake) I could eat and still be in ketosis.

If it's noon and I haven't eaten since noon yesterday I am either in ketosis (feeling great) or suffering from inability to release/burn stored fat (feeling weak/tired/hungry) unless I somehow ate 2 days worth of carbs yesterday. I threw in the "mass quantities" part because when I was a binge eater of junk carbs I'm sure I didn't go into ketosis overnight but nowadays I do. I normally eat early enough in the day and few enough carbs that I can't avoid ketosis overnight. I like that because there's no need to eat until it's convenient since I'm unlikely to run out of stored fat to burn in the foreseeable future. In fact, now that I'm acclimated to fat-burning I have to logically decide to stop fasting since I don't get hunger signals. My simple rule is that I don't go longer than 48 hours (4 pm Mon, for example, to 4 pm Wed) without eating so I can be fully active and nourished without risk. Clarification: While I finished eating at 4 Mon, the actual period of ketosis would be more like 24-40 hours since I would have digested and used nutrients from the Mon meal.

1
273729a18d2f18903815d2644a4d64de

(1683)

on January 19, 2012
at 07:58 PM

The state of "ketosis" is when your body released ketone bodies into your blood and your body begins to make use of stored body fat for energy when there is no glycogen left to produce energy.

As for a "ketosis fast" Ive never actually heard of that...you achieve ketosis by eating and maintaining a VLC diet (most say under 50 g. of carbs a day MAXIMUM, but I say aim lower if ketosis is your goal). This means LOTS of good quality proteins and fats and some leafy greens. You should eventually start heading into ketosis after about 2 days (working out helps, especially if fasted) however you will not be fully keto-adapted for about 2 weeks. When you start to enter into ketosis many have reported an increase occurrence of urination (and a slightly metallic scent), metallic taste in mouth, and increased energy levels and mental clarity.

There is no "ketosis fast" unless you plan on starving yourself and allowing your body to eat away at everything stored...but thats a little counter productive. Try upping your protein and fat and cut almost all carbs, continue to workout if you do and you should notice some of the characteristics of ketosis listed above within a few days.

GOOD LUCK!

273729a18d2f18903815d2644a4d64de

(1683)

on January 20, 2012
at 01:16 AM

if anything just go out on long relaxing walks :] long walks or hikes are easy to do, low intensity, and VERY paleo.

F44b15b2fd1ad134200793d6b474fc4c

(938)

on January 20, 2012
at 01:15 AM

Thanks so much, Michelle. I like your plan -- upping protein and fat and going VLC. Due to chronic illness, I can't work out. I'm able to do some qigong for 10-20 minutes, but that's about it.

0
Ccacf7567273244733bc991af4ac42ed

on January 19, 2012
at 08:16 PM

I think essentially this would be zero-carb, and arguably simply a fat fast. Ketosis can be thought of as how you use fat for fuel when there's no glucose around. So it will occur if you eat nothing (using your bodyfat) or if you eat fat. If you eat anything else, you'll be making glucose available that will be used for fuel first, so disrupting the ketosis.

0
D5a4ff096a452a84a772efa0e6bc626e

(2486)

on January 19, 2012
at 08:09 PM

On a fast you typically eat nothing. If your primary goal is to get into ketosis, an 18ish hour fast after a week of low carb eating is a great way to get there. Some choose to extend the ketosis element by eating a few tablespoons of coconut oil to break the fast, providing calories that are easily turned into ketones in the body. This assumes you can handle spoonfuls of coconut oil on an empty stomach; not everyone can.

0
5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 19, 2012
at 07:54 PM

I'm not really clear on the terminology you're using. You can fast to get into Ketosis and you can fast while in Ketosis. Fasting generally means you don't eat (so it's not a matter of what you can and can't eat). What exactly are you looking to do?

Ed983a42344945b1ff70fd9597a23493

on January 20, 2012
at 01:25 AM

I wonder if you mean ketogenic instead of ketosis?

F44b15b2fd1ad134200793d6b474fc4c

(938)

on January 20, 2012
at 01:12 AM

James - I was just told by a Paleo person that because I have immune system issues that probably result from inflammation, I should try a ketosis fast (I'm been Paleo -- very strict -- since September). I just don't really know what a ketosis fast is!

5e36f73c3f95eb4ea13a009f4936449f

(8280)

on January 20, 2012
at 04:01 PM

From what I'm seeing so far, it looks like the term is coming from the Perfect Health Diet people. I don't consider it a fast. More like intermediate fasting broken up by high fat/low to zero protein meals to help feed ketosis.

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