Hairloss during long fast while not very common some folks do experience some hair loss. By all account I have read in this forum over the years the hair does come back. One regular poster over the years that I remeber had this hairloss issue is Somer. Maybe she'll read this and chime in.Keep in mind though that Somer educated herself and her fast was supervised by a Naturopath Dr who explained the issues to her and she followed with a comprehensive plan of nutrition and regualr exercise.
Since the MC is NOT a weight loss diet and it is as the name impies a "CLEANSE" the system goes into fasting mode and the dieting mentality of lack of proteins vitamins and nutriens is not the issue here. Long fasts should not be taken lightly and one should research "fasting" and how it works to educate themselves on the actual process and how "fasting" actually works.
The MC or any of the cleanses are not single solutions to any issues you might be trying to address. They are just "tools" that help clean out the trash so the system will operate more efficiently and then the system can "heal itself" through the use of balanced nutrition and regular exercise post fast. Any and all healing/success you may have with any of the cleanses will hinge completely on this understanding. Any an all permanent success hinges totally on what you do after the fast regarding balanced nutrition and regular exercise. Without a lifestyle/diet change you will not only go back to where you started but possibly worse. Balanced nutrition and regular exercse is and will always be the main focus using the different tools (cleanses) to make the process quicker and more efficient.