. 2014 Oct 13;19(10):16416–16427. doi: 10.3390/molecules191016416

Table 3.

Correlations established between the concentration of extracts with antioxidant activity EC₅₀ values.

EC₅₀ (mg/mL)	DPPH Radical Scavenging	Hydroxyl Radical Scavenging Activity	Reducing Power
Areca seed	0.409 ^b	3.575 ^a	0.188 ^b
Ascorbic acid	0.964 ^a	0.557 ^b	0.401 ^a

Data followed by different letters in the same column are significantly different at 0.05 probability level (df = 3).