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Free radical scavenging activities of methanol leaf extract (KAL) and stem bark extract (KASB) of K. africana and leaf extract (SHL), root extract (SHR) of S. hispidus and α-tocopherol determined by DPPH method.
| Extracts | IC50 (μg/mL) |
|---|---|
| KAL | 56.9 |
| KASB | 13.7 |
| SHL | 49.8 |
| SHR | 45.1 |
| α-tocopherol | 1.5 |
