Rooted in Nature: Botanicals for Hair and Responsibly Sourcing Them: A Review.

The article presents history related to use of botanical extracts as hair products. Topics include plant oils were used for hair coloring and during the Roman Empire, walnut shells were steeped in olive oil to turn it brown, and botanical extracts have also been used historically for hair cleansing and scalp treatments, such as citrus plants in ancient Egypt.