From: Antioxidant and cytoprotective activities of Piper betle, Areca catechu, Uncaria gambir and betel quid with and without calcium hydroxide
Assay
TPC vs 1/DPPH
TPC vs FRAP
TPC vs FTC
TPC vs CP
r value
0.972
0.981
-0.951
0.682
p value
< 0.01
0.005