I recommend drastically limiting snacking to prevent metabolic issues. Our current model of feeding children, in which it is considered nearly child abuse to expect a child to go from one meal to the next without a juice box and crackers, has resulted in epidemics of both childhood obesity and diabetes.
However, growing children need nutritients to grow, and I do not recommend limiting food beyond 3 meals a day.
Teenagers and young adults (under about 22-25) should not fast for similar reasons, because their bodies are still developing. Though I think a bit more fasting is OK. Going down to 2 meals a day is probably OK, even the occasional OMAD.
I do not think pregnant or breastfeeding women should fast. Growing an entire other person requires a lot of nutrition.
If you are in one of those categories and have fat you wish to lose, I would recommend a ketogenic diet, but postponing fasting to a better time.
![Exclamation :!:](./images/smilies/icon_exclaim.gif)
The purpose of fasting is to heal your body; don't be stupid and cause harm instead!