Why is the Master Cleanse considered a fad diet?

Why is the Master Cleanse considered a fad diet?

Andrea Giancoli (Registered Dietician ) gives expert video advice on: What is the 'Master Cleanse Diet'?; What makes the lemon,syrup or pepper combination so special?; Are a cleanse, detox, and fast the same thing? and more...

The Master Cleanse is considered a fad diet because it's very restrictive. There are not a lot of foods on the diet that you can actually eat. It's mainly a liquid diet and it's not a diet that you can do long term.