2.1. Preparation of CV
The supercritical extract and enzyme-treated extract of Beluga (Huso Huso) caviar used in this study was sourced from Almas Caviar Inc. (Gyeonggi-do, Republic of Korea). Almas Caviar Inc. is actively engaged in environmental conservation efforts aimed at preserving sturgeon resources (a CITES-listed item), the primary source of caviar. Their commitment involves employing Sustainable Technology, specifically species conservation science, in the caviar production process. Prozyme1000L, an endopeptidase obtained from a culture of the genus Bacillus, was used for enzymatic treatment of the caviar extract, and CV was prepared as previously described [