El Arte de la Naturaleza, El Arte de la Ciencia
Hamamelis virginiana, commonly known as American witch-hazel is a winter-flowering shrub native to eastern North America. Native American tribes used the extract for the treatment of bleeding, swelling, bruises, wounds, sore muscles, insect bites, and skin rashes. It was also considered an astringent and purifier. Today, the topical use of witch hazel is known for its astringency associated with high tannin content. The main constituents of witch hazel bark are phenolic compounds including hamamelitannin, gallic acid, and catechins, which have strong anti-oxidant properties. Witch Hazel Bark-ANB shows anti-oxidant, skin brightening, and anti-wrinkle activities. Witch Hazel Bark-ANB also has strong anti-acne activity by inhibiting growth of Cutibacterium acnes (C. acnes).