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. 2014 Jun 6;52(6):3627–3633. doi: 10.1007/s13197-014-1426-3

Table 3.

Antioxidant activity of SCCO2 extract of Spirulina

Sample *IC50 (μg mL−1)
DPPH Reducing Power Hydroxyl radical scavenging assay
SCCO2 extract 109.6 ± 3.0 81.66 ± 2.5 112.70 ± 0.89
Ascorbic acid 7.3 ± 0.3 9.76 ± 0.2 -
BHT 23.3 ± 2.0 1 7.36 ± 1.8 28.97 ± 0.25

*IC50 value: concentration at which the DPPH and Hydroxyl radicals were scavenged by 50%: Absorbance was 0.5 for reducing power respectively. Each value is expressed as mean ± SD