AA-2G also showed a strong ABTS radical scavenging ability (Ta- ble 4). The ABTS radical scavenging ability of AA-2G was very close to the radical scavenging ability of BHA. Takebayashi et al. reported that AA-2G had the highest ABTS radical scavenging ability under neutral conditions.21 Therefore, when the pH of cosmetic lotion was close to neutral pH, AA-2G was expected to have the highest ABTS radical scavenging ability.