The blank slate of a new year is a seductive time when it comes to beauty and wellness. As the December indulgence fades, many of us are tempted by the pull to press the reset button. So — here are the most exciting upcoming trends and developments in skin, health, fitness and general wellbeing this year. I have sifted through many mad and pointless predictions, to find the ones which are really worth paying attention to. From supercharged water to red-light therapy for the body, here's what you need to know.