Abstract

GAS-EXPANDED LIQUID EXTRACTION OF ASCORBIC ACID AND POLYPHENOLS FROM UVC-TREATED MALPIGHIA EMARGINATA DC: ENHANCED BIOAVAILABILITY AND SKIN PIGMENTATIONREDUCING EFFECTS

Yoshida Hiroki MD*

.

Abstract

We investigated UVC treatment of acerola cherries (Malpighia emarginata DC) on the farm immediately after harvest to obtain extracts with the highest ascorbic acid content and intact polyphenols (hesperidin, rutin, tannins, and quercetin). Ascorbic acid and phenolic compounds were extracted from Malpighia emarginata DC using gasexpanded liquids (GXLs). 338.2 mg/g of ascorbic acid was found in the extract and 195.2 mg/g of ascorbic acid was found in the acerola juice powder. The antioxidant activity of the extracts increased as the concentration of ascorbic acid increased. Abundant polyphenolic compounds were detected in the phytochemical profile by LC-Q-TOFMS/ MS in the extract obtained using our extraction method. The bioavailability of the extract has been confirmed to be higher than that of synthetic ascorbic acid in humans. The extract was also found to be more effective in reducing skin pigmentation than other treatments.

Keywords: .