Q. My hair is prone to dryness and frizziness, particularly at this time of year. I am eating more protein and essential fats but what products could improve its condition? 

A. Most people tend to think collagen is just for skin, but it is also highly beneficial for healthy looking hair. ApHogee Two-Step Protein Treatment (£17.89, amazon.co.uk) is a salon service product unlike any product available for at-home use. This unique treatment is formulated with magnesium and modified proteins that fuse into the hair with the application of heat. It restores even seriously damaged hair to normal healthy condition. I would recommend having it done at a salon the first time and then doing it at home. It contains a small amount of silicone, as most tend to, but hydrolysed collagen is number two on the ingredient list followed by vegetable protein and Vitamin E.