Castanea Sativa Leaf Extract

Castanea sativa leaf extract is derived from the leaves of the sweet chestnut tree, native to southern Europe. The extract is typically produced using ethanol and water, which allows researchers to isolate its active compounds—primarily polyphenols—that give it antioxidant properties.In skincare formulations, this extract functions as a skin conditioning and soothing agent. Its antioxidant activity means it can help neutralise free radicals on the skin's surface, which are unstable molecules generated by UV exposure and environmental stressors.

The extract contains phenolic compounds that possess free radical scavenging ability. When applied topically, these compounds can donate electrons to free radicals, neutralising them before they cause oxidative damage to skin cells. This mechanism is thought to help reduce the cumulative effects of UV-mediated skin injury and oxidative stress.The extract also appears to support the skin's own antioxidant defence systems, offering a form of external reinforcement against environmental damage.

Castanea sativa leaf extract is typically incorporated into serums, creams, and other leave-on formulations rather than used as a standalone product. For best results, use it as part of a complete skincare routine that includes sun protection, as antioxidants work best when combined with daily SPF to prevent ongoing free radical generation.

Castanea sativa leaf extract is generally well-tolerated and showed no significant irritation in patch testing. However, those with known sensitivities to botanical extracts or tree nuts should approach with caution and perform a patch test first.