Walnut Shell Extract (Juglans Regia) is from the sticky coating of the outermost shell hull. The Walnut tree is native to North America. It is a common east Asia remedy for treatments of coughs and respiratory illness.
It is beneficial for treating various skin disorders and infections. Bakers use this extract as a food additive to provide a nutty flavor to baked good.
Its is an astringent product with a skin tightening effect.