In the end, he says you don’t need to wear blue-light-blocking glasses during the day. However, our bodies associate blue light with daytime, so exposure to it when you’re trying to go to bed ...

Alison Hammond has taken over This Morning's Friday episodes (alongside Dermot O'Leary) so of course, we've had a look at all of Alison Hammond's This Morning outfits and where you can get high street ...