<human>: Give me the gist of the text in a nutshell

I'm World of Warcraft roleplayer that likes to do their research before making a character. My character idea is a Seeker of Glorious Truths, which is a fancy way of saying "magic fantasy priest who takes some crazy vow and must uphold it no matter what". My Seeker's vow is one of generosity. Everything they have and receive that isn't absolutely necessary to live is given away. As such, she'll eat only what she needs to survive, as anything else would need to be given away. What kind of effects would this have on the body, fantasy-magic notwithstanding? I've tried Googling around, but the most I get is just "organ damage", nothing too specific.

First time posting here, and the box up top tells me to be specific, so here's some trivia on the character, I suppose. 20 years old, 5'1", average build before starvation, Caucasian, duration will be ongoing (a sort of timeline would help, I suppose), no medical issues or medications.
<bot>: Roleplaying character will be starving themselves, only eating enough to keep themselves alive and kicking. What short-term and long-term effects woild this have on her body?