Completely curious - how is Intermittent Fasting different from the "starving" diets many teenagers do?

I'm wanting to try IF, but I had several ED issues as a teen, leading to some gastrointestinal and heart issues.No criticism whatsoever, I was just wondering how IF differs from starvation dieting, and if there are any associated health issues via /r/intermittentfasting https://ift.tt/2shBSOe https://ift.tt/eA8V8J