Table 2.

The antioxidant potential of F. nodosa subsp. geniculata.

	DPPH Test IC50 (µg/mL)	ABTS Test IC50 (µg/mL)	β-Carotene Bleaching Test (IC50, µg/mL or % Inhibition)		FRAP μM Fe (II)/g
			t 30 min a	t 60 min a
Essential oil	26.3 ± 4.3	14.0 ± 1.1	39.4%	32.7%	16.9 ± 1.3
Positive control
Ascorbic acid	5.1 ± 0.82	1.7 ± 0.3
Propyl gallate			0.09 ± 0.08	0.09 ± 0.06
BHT					63.4 ± 4.6

Data are expressed as means ± S.D. (n = 3). ^a: at maximum concentration tested of 100 μg/mL.