Want to grow your hair this year? Here are four serums that do the job – including a £6 buy that prevents dandruff

WHETHER that’s smooth tresses or glossy waves, we all want hair that looks and feels healthy. For many, one of our New Year’s resolutions is to become a real-life Rapunzel – but where to start? If you’ve tried the viral rosemary oil trend, scalp massages and other hacks but with no results, one beauty buff…