Table 3. In vitro antioxidant activity (% of 2 mM ascorbate as a standard) of Beta vulgaris leaf and stalk extract (4∼512 μg/mL) indicated by DPPH assay.

Concentration	Antioxidant activity (%)
4 μg/mL	3.23±0.29
8 μg/mL	4.26±0.52
16 μg/mL	21.61±3.72
32 μg/mL	43.58±1.72
64 μg/mL	60.31±1.89
128 μg/mL	78.58±1.89
256 μg/mL	88.47±1.89
512 μg/mL	94.26±0.93

Data are reported as means±SE of 3 replicates.