Peel the onion and wash it thoroughly. Chop it into small cubes.
Put onion cubes in a food processor and grind it to make a fine paste. Extract the juice and add few drops of rosemary essential oil.
Dip a cotton ball in an onion juice and apply it on your scalp. Leave it on for 30 – 45 minutes. Rinse it off with water first and then use a mild shampoo.
Use this method once a week. You can also add 1 teaspoon of coconut oil for deep conditioning.