Hi. My 17 year old wants to do the Master Cleanse. She is almost 300 lbs, and does moderate exercise, does not each much junk food, and can lose weight, but her ankles hurt and she wants to try it. I'm concerned about her energy levels (she's in school and we are working out more), etc. Can she do it?? Also, I think she should add in fruits, nuts and seeds, plus a daily vitamin if so.