Salix Nigra Bark Extract

Functions
Exfoliator
Antiseptic
Astringent
Antioxidant
Smoothing
Anti-inflammatory
Protective
CAS Number(s)
84650-64-6
EINECS number(s)
283-522-3
FDA UNII
QU52J3A5B3

Willow, of the family Salicaceae and genus Salix, is a common species in North America. The Black Willow (Salix nigra) tree, found in the eastern part of the North American continent, is famous for its dark brown, ridged bark. Rich in tannins, salicylic acid, and various salicylates, Salix Nigra Bark Extract is made by an aqueous infusion technique from freshly harvested bark collected in the spring, following time-honored shamanistic traditions. It was used in traditional medicine for its astringent, anti-inflammatory, antipyretic, antimicrobial, and analgesic properties.

Salicylic acid, at use levels in cosmetic formulations of around 0.5% to 1.0%, has been shown to enhance skin cell turnover. After the application of Salix Nigra Bark Extract, cell renewal is accompanied by a general improvement in the appearance of the skin. The smoothing effect results in a reduction of fine lines and wrinkles. Salicylic acid is also known for its antimicrobial capabilities – it is used as a remedy for problem skin conditions.

Salicylic acid’s superior exfoliation action is thought to be attributed to its lipid solubility. It concentrates its exfoliation action in the lipid-rich outer layers of the skin, where the skin’s natural rate of exfoliation reduces with aging, causing a buildup of dry, dull skin flakes. However, salicylic acid, a β–hydroxy acid, also exfoliates within the pores which leads to its localizing more deeply in the skin. This could account for its observed higher level of irritation. If a product is thought to be too strong or irritating to the skin, it will not be used as often. Expected results may not be seen if manufacturer-recommended usage is not followed clearly impacting the effectiveness of the product.

In Repeat Insult Patch Tests, Salix Nigra Bark Extract has been found to be non-irritating to the skin even at its use level of 10% as compared to that of 1% synthetic salicylic acid. The incorporation of Black Willow bark extract into a liposome has shown to increase the product’s anti-microbial and exfoliative properties.

Salix Nigra Bark Extract is better able to increase the turnover of the stratum corneum and also has more in vitro antimicrobial activity against Staphylococcus aureus and Propionibacterium acnes. Coupled with this increased efficacy, it has less irritation potential than salicylic acid. The EpiDerm and EpiOcular assays made actual comparisons between Salix Nigra Bark Extract and salicylic acid, and the natural extract proved to be much less irritating actually comparable to glycerin.

Synonyms
Black Willow Bark Extract
NAB ® Willowbark Extract
Salix Nigra (Willow) Bark Extract
Salix Nigra Bark

Related ingredients

Abyssinian Oil
Abyssinian Oil
Abyssinian oil (Crambe oil) achieves a significant improvement on the surface structure as well as the evenness of the skin tone.
Acetyl Dipeptide-1 Cetyl ester
Acetyl Dipeptide-1 Cetyl ester
This lipopeptide exhibits good stimulating results on elastin production. As a result, Acetyl Dipeptide-1 Cetyl ester fights against cutaneous sagging and decreases the visible effects of gravity on the skin.
Acetyl Heptapeptide-9
Acetyl Heptapeptide-9 mimics the TGFβ. Acetyl Heptapeptide-9 effects on fibroblasts, stimulating collagen, elastin, and other components of ECM production.
Acetyl octapeptide-3
Acetyl octapeptide-3
Acetyl Octapeptide-3 is a brilliant, new, deep penetrating, powerful amino-peptide with a fantastic ‘BOTOX® like’ effect.
Acetyl Tetrapeptide-5
Acetyl Tetrapeptide-5
Acetyl Tetrapeptide-5 is a fantastic, super effective, naturally derived tetrapeptide that helps reduce the look of puffy eye bags and dark circles under the eyes and helps prevent them from reappearing.
Acmella Oleracea Extract
Acmella Oleracea Extract
Acmella Oleracea is an exotic plant, also known as Paracress. In the Indian Ocean region, it is called "Mafane". Reduces facial muscle micro-contractions, smoothes and reduces lines and wrinkles.
Acnacidol™ BG
Acnacidol™ BG
Acnacidol™ BG is a clinically tested complex that contains Queen bee acid (10-HDA or 10-Hydroxydecanoic Acid found in Royal Jelly that controls and reduces sebum and the appearance of acne.
Adenosine 5 Triphosphate (ATP)
Adenosine 5 Triphosphate (ATP)
Naturally existing in our bodies as part of the molecule adenosine triphosphate (ATP), responsible for transporting energy for numerous cellular and muscular functions in our body
Alaria esculenta extract
Alaria esculenta extract
Rich in antioxidant oligosaccharides protects the skin from UV-induced damage and oxidative stress. Alaria esculenta extract has a skin-lightening effect similar to vitamin B3.
Alistin®
Alistin®
Alistin® (Decarboxy Carnosine) is a synthetic antiaging pseudodipeptide with high stability and resistance to enzymatic hydrolysis, that cell membranes oxidative stress and dermal fiber from cross-linking.
Alpha-Glucan Oligosaccharide
Alpha-Glucan Oligosaccharide
Thanks to the specificity of its inter-glycosidic bonds, Alpha-Glucan is a selective substrate for the nutrition and development of the skin's saprophytic (beneficial) flora to the detriment of undesirable opportunists flora (pathogenic or not) ready to invade the skin at the slightest sign of imbalance.
Apple extract
Apple extract
The Apple awakens energies and is said to have an exceptionally activating effect on the body. The scent contributes to an extremely refreshing and stimulating sensation.