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This study was carried out to investigate the  in vitro  antioxidant potentials of the leaves and fruits of  Nauclea latifolia , a straggling shrub or small tree, native to tropical Africa and Asia. Hot water extracts of the leaves and fruits of  Nauclea latifolia  were assessed for their total polyphenolic, flavanol, and flavonol contents as well as 1-diphenyl-2-picrylhydrazyl (DPPH) scavenging ability, ferric reducing antioxidant power (FRAP), Trolox equivalence antioxidant capacity (TEAC), and oxygen radical absorbance capacity (ORAC) assays. The aqueous extract of the leaves was found to contain higher level of total polyphenols (11.63 ± 0.023 mg GAE/g), flavanol (1.45 ± 0.10 mg CE/g), and flavonol (2.22 ± 0.37 mg QE/g) than the extract of the fruits with values of 1.75 ± 0.02 mg GAE/g (total polyphenol), 0.15 ± 0.01 mg CE/g (flavanol), and 1.00 ± 0.13 mg QE/g (flavonol). Similarly, the aqueous extract of the leaves also exhibited higher DPPH (IC 50  20.64 mg/mL), FRAP (86.10 ± 3.46   μ  mol AAE/g), TEAC (94.83 ± 3.57   μ  mol TE/g), and ORAC (196.55 ± 0.073   μ  mol TE/g) than the extract of the fruits with DPPH (IC 50  120.33 mg/mL), FRAP (12.23 ± 0.40   μ  mol AAE/g), TEAC (12.48 ± 0.21   μ  mol TE/g), and ORAC (58.88 ± 0.073   μ  mol TE/g). The present study showed that  Nauclea latifolia  has strong antioxidant potentials with the leaves demonstrating higher  in vitro  antioxidant activities than the fruits.

In VitroStudy on the Antioxidant Potentials of the Leaves and Fruits ofNauclea latifolia