Why do they say starvation doesn’t help someone lose weight?

Those ppl are still eating, or @ least drinking. Cleansing diets are healthy but u HAVE 2 do it right, otherwise it isn't. There are certain things they want u 2 drink, and apples are good for you so that couldn't have been 2 bad. But the reality is, sure it will help u, but when u are starving urself ur body knows wats happening, so when u do start eating u'll pack on the wait like there's no 2morro b-cuz ur body thinks it won't b getting anymore food. Plus, actors & actresses aren't the best role models.