Antioxidant and Hypoglycemic Activities of Polyphenol Extracts from Sugarcane Molasses and Their Application in Low-GI Mooncakes
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Abstract:
Polyphenol extracts were obtained from sugarcane molasses using Amberlite XAD-2 adsorbent resin, and their physicochemical properties were determined. The total phenolic content of the polyphenol extract was 36.41 μg GAE/mg (gallic acid equivalent). The IC50 values for DPPH and ABTS+ free radical scavenging were 0.049 mg/mL and 0.311 mg/mL, respectively. The oxygen radical absorbance capacity (ORAC) was 1 528.48 μmol TE/g (Trolox equivalent). Furthermore, according to the hypoglycemic activity analysis with respect to α-glucosidase, the IC50 of the polyphenol extract was 0.05 mg/mL. These results suggest high antioxidant and hypoglycemic activities of the extract. Subsequently, sugarcane molasses were added during the production of mooncakes. The products were compared to those containing equal amounts of oligo-maltose molasses. The results indicate that mooncakes containing sugarcane molasses had superior sensory quality score (93) and a lower glycemic index (GI; 30.81). Thus, mooncakes containing sugarcane molasses constitute a low GI food. In summary, molasses rich in polyphenols exhibit good antioxidant activity, and their addition to mooncakes improves the associated quality and GI value. This study provides a theoretical basis for the study and application of molasses as a low-GI healthy food.
