Weight / Fat loss

Isn't it well dodgy to replace meals with protein shakes, I mean yes sure you'll lose weight but when you start eating normally again won't you just pile it back on because your body will have been on borderline starvation mode?

The general idea is to eat less, in order to lose weight. Yet maintain a healthy carb intake to fuel your level of activity, and a healthy protein intake to recover from said activity without muscle loss.

Protein shakes help to balance this^ diet.