My best friend is getting ready for a lifestyle change. She has eaten fast food and not done regular exercise for quite some time due to depression. She is currently being treated for depression and now wants to take better care of herself. She is not going on a "diet", but more of just watching calories and eating healthier. But she is completely adamant about needing to detox before she starts. She says that she needs to get out all of that bad stuff from fast food, sodas, and all the other junk. She says she wants to either fast on lemon water or just fruit for a week or more. I'm really concerned about her because this does not sound healthy at all. So does she need do a detox at all? And if so what would it include?