[vijayboyapati]

I wonder if similar benefits can be had by practicing the method of "lean gains" aka "intermittent fasting", or whether this only works with 3 days of fasting, which is a long time to go without food. I'd certainly find it hard to be productive during that extended period.

[rsync]

Everybody is different, and my anecdote should have very little weight attached to it, but ...

I do an 18 hour fast once per week, which is a very modest fast. On the other hand, I have a very, very comprehensive and intense exercise regimen, so my resting metabolic rate is quite high, and 18 hours with zero calories clears my body out very thoroughly.

And I notice it greatly - it feels fantastic. I feel very quick and light on my feet. It's noticeable.

Am I improving my immune system ? Who knows. However, it is definitely less than a 3 day fast, and it definitely improves my health.

[hartator]

Wonder this too. Found this: http://www.medicalnewstoday.com/articles/277860.php, "prolonged periods of fasting - repeated cycles of 2-4 days with no food - over the course of 6 months,"