From scalp care to onion juice – 9 ways to boost your hair health in 2019, according to experts by Press Association Cold, damp weather, plus weeks of partying, bad diet and not enough sleep means winter can be a recipe for hair disaster. So, with January on the horizon, there’s no better time to give your tresses some TLC. That doesn’t mean a complete overhaul of your routine – depending on the state of your locks all it takes is a couple of tweaks to get them back to optimal condition. Pick from these transformational new-hair resolutions… 1. Look after your scalp “When it comes to hair health and growth, scalp is king,” says Anabel Kingsley, trichologist at Philip Kingsley. “If you think of each hair as a flower, and your scalp as the soil supporting it, it makes complete sense to nourish and care for your scalp. “Just like the skin on your face, your scalp benefits from weekly exfoliation. Exfoliation helps to remove dead skin cells and pesky flakes. It also encourag...