Headphones have been aiding anti-social behaviour since the invention of the Walkman in '79. But the rise of the smartphone, and with it the ubiquity of headphones, could be changing what music we listen to as producers ‘mix small’ to cater to the 41% of Americans who use them.

In a world where products and clothes are designed to fit every body shape and size, why does medicine still use ‘one size fits all’? Is wearable technology finally advancing to provide a more bespoke healthcare service and more personalised medicine?

Tucked into the pockets of 44 million people in the US alone, iPhones have become our lives – and now they could save them, too. Apple’s ResearchKit is a platform for creating apps that collect medical data and it's got potential to completely alter personalised medicine and mobile health.

Are we all hacking our health? Is an American hospital about to shake up the NHS? And are crystals, chakras and gurus due a comeback? As part of our Expert Outlook 2017 series, we speak to three health and beauty experts about how we will be looking after ourselves next year.