You might be kidding, but extended fasting, water fasting, and fasting while drinking salt/potassium water have millions of followers.

I have personally tried fresh vegetable juice only for 30 days and I think it's amazing. I didn't even drink any actual water for 30 days, since I was drinking 1 gallon+ of vegetable juice a day (fresh juiced at home, not pasteurized garbage).

I personally think the ideal diet would be vegetable juice plus some beef. Which is what most people would say ("hey, just eat a lot of salad and some meat sparingly"). Except it's way easier to drink 8 lbs of vegetables than it is to eat them.

As promoted by Famine in the book 'Foodless Dieting: Slim Yourself Beautiful ("The Diet Book Of The Century!")'

https://wiki.lspace.org/Famine_(Good_Omens)