Also known as Salix nigra, black willow bark is rich in tannins and salicylic acid-like materials. The freshly prepared extract has been reported to have analgesic, antiseptic, astringent, anti-pyretic, anti-microbial, and anti-inflammatory properties. Black Willow Bark has been shown to possess potent antimicrobial properties. Efficacy testing has shown that the extract has activity against Staphylococcus aureus and Propionibacterium acnes, two of the skin flora implicated in the formation of acne. When added to cosmetic formulations, the extract/tincture can also increase the cell renewal capabilities of cosmetic formulations. Studies have found that it is also an anti-oxidant. At I Got Youth!! Natural Serums, we use this tincture as a wonderful natural preservative.