Biologic Propensities and Phytochemical Profile of Vangueria madagascariensis J. F. Gmelin (Rubiaceae): An Underutilized Native Medicinal Food Plant from Africa

Table 2

Relationship between phytochemical constituents and key carbohydrate enzymes inhibitory effects of extracts.

Phytochemical constituent	α-amylase IC50^a (µg /mL)		α-glucosidase IC50^a (µg /mL)
	r	Sig. (2-tailed) value	r	Sig. (2-tailed) value
Total phenolic content ^1	−0.20	>0.05	0.98	>0.05
Total flavonoid^2	−0.99	>0.05	0.57	>0.05
Total proanthocyanidins^3	−0.56	>0.05	0.99	>0.05

aIC₅₀ is defined as the concentration sufficient to obtain 50% of maximum scavenging activity, expressed as mean ± SD (𝑛=3). r = Pearson correlation. ¹mg GAE/g fresh weight; ²mg RE/g fresh weight; ³mg CE/g fresh weight.