August 26/Food & Farm Week -- According to a study from Tianjin, People's Republic of China, "Three polysaccharide-rich fractions named GTPS, OTPS, and BTPS were isolated from green tea, oolong tea, and black tea, respectively. Chemical characteristics, glycosidase inhibitory effects, and antioxidant properties of the three fractions were compared."
"Monosaccharides of GTPS were composed of D-rhamnose, L-arabinose, D-xylose, D-mannose, D-galactose and D-glucose, but there were no xylose and mannose detected in OTPS and BTPS. The molecular weight distributions were decreased from 9.2 to 251.5 KDa to 3.8 to 32.7 KDa with the fermentation of the tea from green tea to black tea.