There's one simple tip we can all do to improve our brain health, it costs nothing and it's something we don't do enough of.

Speaking to Dermot and Dave as part of our weeklong, Mind Yourself Now specials, neuroscientist and host of the SuperBrain podcast, Sabina Brennan explained the benefits of smiling.

Sabina also had some practical tips on small changes we can make in our daily lives to improve our brain health this year.

You can catch the chat in full by clicking play above, and across the week, we'll be joined by a host of experts including a cardiologist, physiotherapist and nutritional therapist.