A BBC Morning Live doctor has warned that some people may be overdoing certain vitamins and should focus on making key lifestyle changes before turning to certain supplements. In fact, for some, it may be pointless. That said, vitamin D can still be beneficial - as long as it’s taken in the right amounts. Speaking about one of our previous articles, ' Vitamin D alert as anyone taking supplements warned of 'upset stomach' , Doctor Oscar Duke said that people need to be careful not to take too