Do you really have the discipline to go on a water only fast? I am glad that Yogananda recommended a fruit juice fast so i can still get a hit of energy from the fructose while there is less energy because of the fasting.
Steve, I did not explain myself clearly.
I used to do water-only fasts, but I could only reach a max of 5 days and with exceptional effort and weight loss. And often binge refeeding, which is deleterious.
Presently Valter Longo devised a 5-day regime that yields similar biological results as a water-only fast while eating a very modest amount of food (750 kcal per day) and very little protein. This latter strategy, called a Fast Mimicking Diet, is the one that I'm following.
I also follow closely the fora and podcasts on longevity. There are a few people who have the discipline to go on 5-10 days of water-only fasting, continuing to work. These are pretty rare examples though, underlining the fact that there are, among non spiritual aspirants, very stoic, tough, disciplined people.
The 9-day cleansing diet of Yogananda is pretty good as well.
