I'm not on my troll shyt this time. I'm legitimately inquiring. Is there any reason to engage in this practice outside of that it is commanded by Allah? Buddhists, Mormons, Hindus, Jains, etc. feel free to answer too, but I don't think there are any of you on this site.
Allah doesn't demand you to do it. It is mandatory for every muslim to participate in the holy month but Allah has only provided the benefits of why you should fast. The Quran doesn't state what happens to you when you don't fast (or maybe it does, but i'm not sure).
Basically, the whole principle of fasting is your willpower and and how you can will yourself to keep away from sins. It's the time where Satan whispers in your ear non stop of things you can do, and makes every thing sound like heaven so you break your fast, but only you have the power to remove those voices. I know for a person who does not believe in god this is hard to believe, but this is what you've been thought all your life as a Muslim.
Besides not eating, there are many other benefits to fasting. People do it to feel good spiritually which in turns helps them live their lives in a peaceful and happy manner. The spiritual benefits of fasting are tremendous and is the biggest reason why millions and millions of muslims fast during the month of ramadan.
Secondly, it helps you get closer to god. It helps your conscious. It makes you think twice about committing a sin.
Lastly, it helps your body go clean. You are required not to think about sexual thoughts, abstain from drinking, smoking...etc. This helps you flush the toxins out of your body. Additionally it makes you think of the people that can't eat on a regular basis, have no way of providing for their family. It's to put your shoes into the shoes of those that have been less fortunate.
For a non muslim individual, these are all very hard to comprehend. I personally hear it everyday. "Oh how can you go without drinking and eating all day?" Well it's very simple. You don't think about it. The first few days are the hardest, because your body is going wtf, but by the end of it, you can only eat a serving and you feel full.
By the end of Ramadan, you feel fresh, completely different. Then you look back at it and say that yourself, if i can abstain myself from many sins in a month, i can do it on a regular basis. Basically your conscious clears itself out by the last day, and you feel like a different person.
(note these are all from personal experiences, and what i've been thought, maybe someone has a different view to it)