If you are into Japanese cuisine, you might know this guy as Japanese pepper or Sanshō pepper that is known for its unique fresh aroma and appetite increasing spicy sensation.
As for the skin benefits of Zanthoxylum Piperitum, it might have antioxidant effects (with active components called hyperoside and quercitrin), but more importantly, it is an antibacterial and natural preservative agent. It is pretty common in K-Beauty products, as it's one of the three natural extracts that make up the popular Korean preservative called EURO-NApre.
Combined with Usnea Barbata and Pulsatilla Koreana, these three extracts are claimed to form a natural preservative system that also has anti-inflammatory effects and might help with skin conditions such as blemishes, atopic dermatitis, and dandruff.
On the flip side, Zanthoxylum Piperitum contains fragrant components (Limonene and Citrone), that might irritate sensitive skin.
Show me some proof
- Yamazaki, Eiji, et al. "Antioxidant activity of Japanese pepper (Zanthoxylum piperitum DC.) fruit." Food chemistry 100.1 (2007): 171-177.
- Jung, S. K., et al. "Improvement of anti-inflammatory and antibacterial effects of combined crude drug extracts including barafu on atopic dermatitis." EXPERIMENTAL DERMATOLOGY. Vol. 25. 111 RIVER ST, HOBOKEN 07030-5774, NJ USA: WILEY-BLACKWELL, 2016.