More than half of the world’s population currently lives in urban areas – and this is expected to reach 70% by 2050. While city living can be dynamic and exhilarating, it also exposes the hair and scalp to a range of factors that affect their beauty and vitality. Stress, pollution and hairstyling can cause the sebaceous glands in the hair follicles to produce too much sebum, which makes
hair greasy or oily.