And just as there are many different ways of fasting, there are many different reasons to fast. Spiritual reasons, health reasons including weight loss, detox... Everyone's reason is different. And there are as many benefits (more, actually) as there are reasons. I started my fast on a whim, which is the same way I became a vegan. I woke up on day and decided I wanted to do it (this summer will mark one year of me being a vegan and I LOVE it).
The first day of my fast was the hardest. I was SO hungry, my stomach kept growling like I had a damn dog in there or something. But, I had my mind made up. I hadn't ate since 12 pm the day before, so I was very hungry, lol. The second day was hard, but I noticed the actual hunger pangs weren't as bad. The third day, I experienced a bit of light-headedness and nausea, but it went away. I also noticed my body was ridding itself of waste. By the third day, I noticed I had more energy. Each day of my fast, I get a little calmer and I have increased energy. As I go on, the hunger pangs grow weaker and weaker. My want to eat is more mental. I won't even be thinking of eating, until I smell someone's cooking or I am cooking for my son. What do I do for hunger? I meditate and/or do yoga in place of hunger. If it gets too bad, I will drink fruit or vegetable juice. I strive to not use juice after 7p.m. (since I don't eat after 7, I figure what I am using in place of meals, I should use the same rule. This is my personal choice. I have no reason other than I think it's best for me. What greater reason is there than that? Lol).
While fresh juice is best, the reality is that not everyone can afford to do fresh juice. Do what is within your budget. Do the next best thing. Get store bought juices that have the least amount of additives. I do a combination of fresh and store bought, because I have to work with my budget. I look for the juices that have no added sugar, color, etc. Absolutely NO lemon juice from concentrate! Lemons aren't too expensive and what you pay for lemon concentrate, you can spend on a bag of lemons. You can squeeze the lemons yourself.
"Fasting will bring spiritual rebirth to those of you who cleanse and purify your bodies. The light of the world will illuminate within you when you fast and purify yourself. What the eyes are for the outer world, fasts are for the inner."--Mahatma Gandhi, 1869-1948