Extraction optimization, antioxidant activity, and tyrosinase inhibitory capacity of polyphenols from .

The objective of this research was twofold: first, to optimize the extraction process of polyphenols using a response surface methodology, and second, to study the antioxidant activity and tyrosinase inhibitory capacity of the polyphenols of different purities. High-speed shearing homogenization extraction was used to extract the polyphenols from . The antioxidant activity and the effect of polyphenols on tyrosinase activity were studied using free radical scavenging assay and the tyrosinase method, respectively.