The bark of the Aspen tree is rich in salicylates that are a part of the tree’s natural defense system against invading parasites. And the same properties that make salicylates effective at protecting the tree also help protect body care products from bacteria and other pathogens – it’s a natural preservative. And it doesn’t quit there. Historically, the salicylates in Aspen bark have also been used for medicinal purposes, and today it’s used to help soothe, smooth, and condition skin. A warrior and a shaman in one.