Last night (yes, my 19 yr old SD sleeps all day and is up all night) my mentally ill (MI) SD came to our room at 8 pm and wanted my wife to take her out to buy a diet supplement claiming she has lost 4 pounds in 3 days. Well, if she had not slept most of those 4 days and had gotten up for meals then she probably would not have lost any weight. Unless she is splurging and purging as she may have done in the past.