Mischa Barton tries the mushroom diet

Katy Perry, Kelly Osborne and now Misha Barton. What do these three celebrities have in common? The latest diet is the answer to this question; the mushroom diet. 

The mushroom diet, dubbed the M-plan diet, consists of replacing two meals a day with mushroom based dishes.

 Mischa Barton, the latest celebrity to try the diet in a bid to loose weight, shot to fame with her character Marissa in the OC in 2003. She is using a mushroom-based supplement, called Proactol XS, to loose weight for an upcoming new film role.

                                                                  Proactol XS is a mushroom based supplement to aid weight loss

Other fad diets which restrict the user to only on type of food in order to loose weight quickly are the cabbage soup diet and the potato-only diet.