... 15% salicin, 25% salicin, 50% salicin HPLC Common names White Willow Bark Extract Specification 15% salicin, 25% salicin, 50% salicin HPLCCharacteristics Light ... brown-yellow powder Plant Origin Salix albaGeneral White willow bark ... , HIV and other viruses, colds and flu and psoriasis. White Willow Bark Extract