What is Willow Bark Extract? Willow Bark is the bark from various types of the Willow Tree, such as White Willow native to North America, Asia and Central and Southern Europe. Willow Bark contains salicylates so acts as a gentle exfoliant and is a natural salicylic acid alternative. Willow Bark Benefits So what is Willow Bark good for? White willow bark helps in making way for fresh and renewed skin through its natural exfoliating properties. It also helps to smooth and improve the appearance of the skin and scalp. Willow Bark for hair The exfoliating properties of Willow Bark mean it is an essential for scalp exfoliation, helping to remove dirt and product build-up from the scalp and helping to shift dead skin cells. Willow Bark in hair products also helps to control excess sebum on the scalp, leaving strands looking healthy and balanced.