Tagging to follow. I'm interested in what Dr. Jason Fung and others have to say, so I'm also interested in this discussion.

Many years ago, before LCHF, I used to do IF accidentally - before I knew it was a thing. I used to often skip breakfast and on those days I wouldn't get hungry till early/mid afternoon. On the days I ate breakfast I would always be hungry by late morning. On the IF days I felt great. Now I understand why.
So lately, I have been experimenting with it in combination with LCHF - cautiously - because I don't want to put any additional stress on my body (and mind, LOL - I am sure I have had excess cortisol issues over the last 5 years or so).
I exercise between 6am and 7am three days a week and I have never eaten before that session. So now, I am stretching the fasting out until 12 noon, whenever I can. Some mornings I can't. I have had to get over the notion that you need to eat protein with 2 hours of heavy exercise, which you hear so often. I now understand that the muscle rebuilding and maintenance happens at night one to two nights after the exercise session - by which time I will have protein in my system.
On these days I am feeling good. I think the early morning exercise has a hunger dampening effect which helps. I don't do a 100% fast on those mornings though. I do have a coffee (black when I can) afterwards with the gang and I have just discovered the joys of Keto Boullion -because the one problem I was having on these days was feeling c*** - and I now understand it was lack of electrolytes.
If you want to learn more, have a look at Abel James' Primal blog and Mark Sisson's Daily Apple blog. Primal seems to be a LCHF version of Paleo and they both (I think) advocate IF and have well researched info to back it up.
I'd be interested in the experience of others.

I do. But since I have been away on holidays, I haven't got back to it. I skip breakfast and have a late lunch between 1-3pm depending upon how hungry I am. I was doing this twice a week.

There is a group on MFP which is dedicated to IF and low carb. They have just started the group.

http://community.myfitnesspal.com/en/group/111854-intermittent-fasting-hflc-16-8-18-6-20-4

I got interested because of Dr Jason Fong's videos.

Thanks @dasher602014

I do, but nothing consistantly. I tend to skip breakfast but I add coconut oil to my coffee - not sure if that can still be called fasting or not. Every few weeks I skip a day of eating. Nothing forced. If it is not a hungry day, I just don't eat.

IF is my regular eating pattern. I typically eat one meal per day at supper, so I guess I do 23:1, with longer fasts from time to time. I do it for increased energy, mental clarity and elevated mood, along with boosting weight loss benefits.

Sunny_Bunny_ wrote: »

When I first went Keto, I was using cream in my coffee with artificial sweetener, which kinda made the fasting null...

Just curious - did you discover this via experimentation or education?

I've been doing it for about 3 months now. I eat between 1pm and 9pm only. I'm never hungry and actually find it quite easy. I also train fasted. Weights 5 days a week and one session of HIIT on a treadmill. Weight is coming off, fat is coming off and I'm actually starting to gain some definition.

I've been doing 18 hour fasts almost every day for 3 weeks, and that suits me very well. I drink coffee and bone broth as I fast.

I am slowly working myself down to a straight 16:8. Currently I have h&h and CO in my coffee. I hope to work down to CO and butter, and then maybe nix the stevia. But honestly, I'm unsure I can manage without the squirt of liquid stevia.

I naturally fell into a 16:8 IF pattern when I started LCHF and then transitioned into keto. Over the past two months I have decided to be more intentional in fasting and have incorporated longer fasts into my routine. I read that the 18 hours fasting is ideal for health benefits, but I am also working on weight issues, so the longer fasts just make sense for me.

I am currently in hour 38 of an intended 40 hour fast. But may actually go longer. While IF (under 24 hrs), I only drink black coffee and tea, lots of water. When I do a longer fast, I will have a small piece of cheese, a few nuts or some HWC in a coffee if I'm starting to feel off. And last night around 8 pm I had two cups of broth. I've done from zero calories up to about 200 calories spread over 1.5 - 2 days. I listen to my body and even to the point where if I am feeling very hungry, and water and activity (usually just a 15 minute walks) doesn't squelch it, I will eat. That's the point, in my opinion, to fuel our brain and body- so if they tell me to eat, that's what I do.

I know, prior to keto, I could never get through 16 hours without eating, and if I did go a long stretch I would binge on anything and everything, and that meal would almost certainly discount the calorie reduction during the fast.

@Sabine_Stroehm I commented on your other post about Jason Fong's book, I strongly recommend it to anyone considering IF/Fasting. It really helped me.

For those, like @baconslave who struggle with black (non sweet) coffee, try a couple of dashes of salt in it. For me, that was key. It cuts the bitterness. The first sip is always still a little rough, but after that I really enjoy it.

RalfLott wrote: »

Sunny_Bunny_ wrote: »

When I first went Keto, I was using cream in my coffee with artificial sweetener, which kinda made the fasting null...

Just curious - did you discover this via experimentation or education?

I know I read it in The Bulletproof Diet and I'm pretty sure I have seen it or heard it mentioned by Jason Fung as well.
It has to do with initiating digestion. The MCT and butter don't require digestion in the way that cream does and since artificial sweeteners actually do so often create at least some insulin, I think that's the thought behind their interference.
Here's a paragraph from the book where he mentions it.

I think LCHF and IF are very complementary. It's really a great combo for evening out the ups and down of digestion, hunger, cravings, etc. And with the potential life extension and neuroprotective benefits of both, man, it's like a secret weapon!

Recently found this You Tube video that I thought was really good.

https://www.youtube.com/watch?v=2Jr9G4yiLVk&ebc=ANyPxKr5I7_XcSXwGimW2t33kuuM76uEINoP8JGvHK4PFrd5qS5s5YVlskdDxdg-tkgbQdiCb6XFxxtHdQTdyD7moY24-useNg

Sunny_Bunny_ wrote: »

It has to do with initiating digestion. The MCT and butter don't require digestion in the way that cream does and since artificial sweeteners actually do so often create at least some insulin, I think that's the thought behind their interference.
Here's a paragraph from the book where he mentions it.

Intetesting. Thanks!