Concentration (µg∙mL⁻¹)

Antioxidant activity (%)

BHT

M.

piperita

C.

citratus

R.

officinalis

P.

boldus

F.

vulgare

25

13.90gA

0.39aB

0.00aB

0.11aB

0.25cB

0.05bB

50

22.80fA

0.54aB

0.20aB

0.01aB

0.18cB

0.00bB

100

38.50eA

0.66aB

0.20aB

0.00aB

0.00cB

0.00bB

150

44.60dA

0.51aB

0.19aB

0.01aB

1.25bB

0.69aB

200

52.50cA

0.52aD

0.34aD

0.06aD

2.32aB

1.36aC

250

59.70bA

0.38aC

0.15aC

0.00aC

1.91aB

1.12aB

500

72.70aA

1.32aC

0.56aD

0.43aD

2.40aB

1.34aC