Here's my fasting story, in a nutshell - a year ago, I went two days without eating anything. Not on purpose, just didn't have food. Probably lasted about 70 hours, but I felt fine the whole time. Ever since then, one day a week I don't eat anything. In my head it's a 24-hour fast but for some reason people count sleeping as fasting so technically it's a 36-hour fast, and it's the only kind I do, and have been doing for 6 months now.
Nearly every post here on fasting has to do with 16-hour "fasts", aka skipping breakfast, or 24-hour "fasts" aka skipping breakfast and lunch. In my mind that's not fasting, that's just delaying your daily food. Fasting for me is not having food at all. I'm wondering:
Why don't more people do whole-day fasts? Is it because it's hard? (It's not really.) Is it unhealthy? (I feel fine during and afterwards.)
Wouldn't all the benefits of fasting (autophagy, fat burning) be higher in a 36-hour fast compared to shorter fasts?
pklopp over on MDA wrote a brilliant series about IF--and he talks about 36 hour fasts within the series.
As for me, 20-22 hour fasts happen occasionally and I fast for 14-18 hours daily. I think there is fabulous benefit to a 36 hour-ish fast. Haven't done it yet, but it's nice to know that I could do it safely.
Sure fine. Read World's Most Effective Diet in Men's Health:
According to Brad Pilon the benefits peak after 22-24 hours. I've fasted 24 and 36 hours. Didn't notice any additional benefits from the longer fast personally.
If you subscribe to Calories In = Calories Out, you should be able to lose a pound a week with a 36hr fast if your normal calorie intake for a 36 hr time period is 3600 calories. Somehow, I thinking fasting blows CICO out of the water.
The Jaminets in pp 246-248 (Perfect Health Diet a version of Paleo) discuss the merits and issues of 16 hour fasts which can trigger autophagy verses 36 hour fasts (once a month).
Shorter fasts may help with immunity and Alzheimer's.
The longer fast should be stopped immediately if signs like anxiety, hunger, dry eye/mouth, or skin infection appear.
They recommend using coconut oil, and green veggies (0 carb) so that fat and fiber (without carbs) help. According to the book, coconut oil can help reduce glucose needs of the nervous system (including the brain) because the short chain fats are easily converted to ketones in the liver.
I naturally fast for anywhere from 24-48 hours randomly, I just listen to my body as it knows what it needs or does not need. I don't fast because its the cool new thing to do, it just seems that the body sometimes needs time to do other things internally other than digesting food.