Balsam Peru Dårligst Plant extracts No known benefits Balsam Peru description Fatty resin that when applied topically can cause sensitivity. It also has the potential to cause phototoxicity. Balsam peru is also a standard used in patch tests for skin sensitivity due to its high incidence of causing reactions. For more information, please see the _Copaifera Officinalis_ entry. Related ingredients: Copaifera Officinalis