There are three poisonous Aloe species Aloe ballyi, Aloe elata and Aloe ruspoliana. These species have leaf sap that gives off a strong ratty odour. Fortunately the first two species are Points to remember , 1) Always remove the yellow, slimy layer as it may irritate the skin., 2) After trimming the edges and removing the yellow part, wash the leaf thoroughly to avoid any residue., Wie behandelt man die Krankheit Braune Flecken bei Echte Aloe? Development of Biocellulose Sheet Incorporating Aloe vera Gel Extract for Diabetic Wound Healing ACS Omega