I m medical student.....i am not concentrate on studies ...my mind is wandering here and there and not concentrate my diet is ....morning 1 cup cofee and 2bread afternoon lunch - inwhich 1 sabji and roti ...evening -chai ...night -1 sabji and roti or dal and chawal alternately  and 1 glass milk and due to busy schedule i cant take sun bath also..can i add vitamin supliment ??...i want to take supradyne beacuse i m vegitarian ...and supeadyne is internationsl brand and majority of element present ...but vit A content is 10000IU ...is it safe ??...and how much time i take supradyne...can i take life long