When a student is willing to study, but a series of daydream, fantasy, imagination can
interfere with his(her) study. In this case, Brain Focus can be a big help for him(her).
If a student study well, he(she) doesn't need the Brain Focus.

note :
The information provided is of a general nature and should not be used as a substitute for professional medical advice. To diagnose clearly you should discuss with your family doctor.