Im sure others have mentioned it but just chiming in with my experiences. Meds will give you the ability to focus and regulate yourself but you still have to actually do it, and i specifically mean scheduling and adhering to a food plan. You need to eat, and drink water and medications like Adderal/concerta/vyvanse will decrease your appetite and potentially thirst. Sometimes fasting is good, this is not one of those times. I seriously cannot stress this enough for medical reasons you should go into it mindful of the side effects and how it can cause damage without strict and proper diet.