Table 4.

Hydroxyl-radical scavenging activity of plant extracts as a function of concentrations.

Plant extracts	Concentration (µg/mL)
	12.5	25	50	100	200
T. mauritianum (aerial parts)	3.73 ± 0.97b	4.99 ± 1.92b	9.07 ± 4.01b	20.98 ± 3.07b	66.001 ± 2.05b
L. macrocarpa (leaves)	1.69 ± 0.61a	2.01 ± 0.15a	4.83 ± 0.67a	15.90 ± 2.12a	22.73 ± 0.85a
L. macrocarpa (roots)	0.7 ± 0.95a	1.14 ± 1.05a	1.89 ± 0.99a	9.93 ± 1.75a	18.89 ± 2.67a
G. bougheyanum (aerial parts)	10.00 ± 0.83c	11.09 ± 0.03d	22.00 ± 0.82d	67.01 ± 2.13d	94.03 ± 1.26e
Vitamin C	2.07 ± 0.40ab	13.07 ± 0.70e	44.02 ± 0.35e	83.05 ± 4.00e	96.98 ± 0.90e

In each column, values with different letters are statistically different at p < 0.05 using Waller–Duncan test.