I did this also....and found that if you clicked yes to absolutely everything except weight loss BTD is your diet. My problem with this is no matter what the genetic problems are the better diet is always BTD if no weight issue!
Try checking yes for a few of the following (whatever is appropriate) and leaving all the other questions blank or check no:
Does diabetes run in your family? Yes
Does dementia (Alzheimer's disease) run in your family? Yes
Does cancer run in your family? Yes
Does hypertension run in your family? Yes
Are you hungry a great deal of time? Yes
Do you appear to be aging faster than friends the same age as you? Yes