Use Rootz hair oil 2-3 times a week by gently massaging it into the scalp, leaving it on for a few hours or overnight before washing. Use Trigaine shampoo 2-3 times weekly, massage into the scalp for 2-3 minutes, then rinse well. Since hair fall after sudden weight loss is common (telogen effluvium), focus on a protein-rich diet, iron and biotin intake, proper sleep, and stress control, and hair usually improves within a few months.