Escin

Escin is a saponin mixture from horse chestnut used in topical anti-redness/anti-edema products, typically at low concentrations (about 0.1–2%). While often tolerated, saponins can disrupt the stratum corneum and have documented potential for stinging/irritant reactions and occasional contact dermatitis, particularly on compromised barriers (eczema, post-procedure) and around eyes. Given real-world use in multi-ingredient formulas and the higher risk in highly reactive patients, a mild (not “gentle”) irritancy score is the safer clinically aligned assessment. Safety Notes: In commercial cosmetics, escin (horse chestnut saponins) is commonly used at low levels (~0.01–0.1%) in facial moisturizers/serums and eye products for de-puffing/anti-redness, often as part of a botanical extract system. Higher-strength consumer-available products marketed for legs/veins, bruising, or anti-cellulite commonly reach ~0.5–2% escin, and a small number of OTC gels/creams list escin around ~3% as a functional active. Rinse-off products typically sit at the low end due to short contact time, while the high end is primarily leave-on gels/creams where solubilization/irritation and surfactant-like behavior become formulation-limiting.