Functional properties of Lonicera insularis leaf as a beauty food

The antioxidative and beauty food properties of Lonicera insularis leaf extract (LLE) were investigated. The 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) scavenging activities of water extract (LWE) and ethanol extract (LEE) were 99% at 100 μg phenolics/mL. The 2-thiobarbituric acid reactive substances (TBARS) inhibition activity was 93% at 100 μg phenolics/mL. The antioxidation effect of LLE was higher than that of butylated hydroxytoluene (BHT). As for beauty food properties, LWE and LEE each showed 24.90-78.96% and 23.83-97.02% elastase inhibition effect, which indicates wrinkle improvement effect. In tyrosinase inhibition effect, LWE and LEE each showed 7.69% and 3.31-7.22%, which indicates skin-whitening effect. Also, LWE and LEE were able to inhibit hyaluronidase by 5.67-22.97% and 7.77-24.11%, which suggests a potential anti-inflammation effect. Notably, the astringency as pore-tightening activity of extracts from Lonicera insularis leaf was 7.48-16.37% (LWE) and 11.41-17.23% (LEE) at 50-200 μg phenolics/mL, respectively. These results show that LLE has antioxidant, anti-wrinkle, whitening, pore-tightening, and anti-inflammation effects. Furthermore, it might be a useful resource as an anti-skin-aging agent.