Sample

TPC (mg GAE/g)

Raw RKB

14.15 ± 0.27^a

Control

10.31 ± 0.34^b

10% RKB

11.19 ± 0.63^c

20% RKB

11.90 ± 0.24^d

30% RKB

12.50 ± 0.64^e