... inflammation. Many cosmetic companies, touting it as a skin toner and restorer, add birch bark extract ... , Betulinic Acid, is currently being tested as a promising cancer treatment. The water soluble form of ... to skincare, it’s often administered as a natural medicinal treatment because it helps facilitate the ... warts. Since it conatins vitamins B1, B2, A, C and E, it is also believed to work as ...