Castanea Crenata Shell Extract Beste Antioxidant Anti-aging Vervaagt pigmentvlekken Verheldert de teint Castanea Crenata Shell Extract at a glance From the Japanese chestnut High in antioxidant polyphenols Helps brighten skin Also impacts skin firmness Castanea Crenata Shell Extract description _Castanea crenata_ shell extract is taken from the inner shell of the Japanese chestnut. While it’s not a widespread cosmetic ingredient, its use is gaining popularity in Korean beauty (K-beauty) formulations. Research shows that depending on how Japanese chestnut shell extract is obtained, it has a high antioxidant content, being particularly high in beneficial compounds known as polyphenols. Additional studies indicate _Castanea crenata_ shell extract has skin brightening and firming properties because of its ability to inhibit both tyrosinase (which has an impact on melanin production) and elastase (an enzyme that can break down elastin in skin). Though it doesn’t have widespread use just yet, this plant extract is another intriguing consideration when it comes to adding tools to your anti-aging arsenal. Typical use levels of this chestnut shell extract range from 0.1–5%, depending on whether it’s the pure concentrated extract or is part of a water-based blend. Related ingredients: Castanea Sativa (Chestnut) Leaf Extract Castanea Sativa Seed Extract