Table 1 Phenolic content and in vitro antioxidant capacity of aqueous rooibos extract

Soluble solids (mg/mL)

2.85 ± 0.39

Total polyphenol (mg GAE/mL)

1.06 ± 0.02

Flavonol (mg QE/ mL)

0.48 ± 0.01

Flavanol (mg CE/mL)

0.19 ± 0.01

Aspalathin (μg/mL)

29.98 ± 0.08

Orientin (μg/mL)

18.61 ± 0.13

Iso-orientin (μg/mL)

25.98 ± 0.52

Vitexin (μg/mL)

6.07 ± 1.05

Iso-vitexin (μg/mL)

7.18 ± 0.20

Hyperoside/rutin (μg/mL)

14.55 ± 2.26

Quercetin (μg/mL)

0.89 ± 0.18

Luteolin (μg/mL)

0.22 ± 0.06

Chrysoeriol (μg/mL)

0.25 ± 0.01

ORAC (μmol AAE/mL)

1.69 ± 0.03

FRAP (μmol TE/mL)

5.20 ± 0.04

TEAC (μmol TE/mL)

4.79 ± 0.33