AA-2G was close to the reducing ability of BHA. Yen et al. have reported that ascorbic acid had good reducing ability but weak chelating activity.22 AA-2G had similar results. Although the metal chelating activity of AA-2G was marginal, AA-2G could provide additional free radical removal ability and reducing ability. Thus, AA-2G can be added in cosmetic lotion as the active ingredient to provide better biofunctionalities.