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

Table 8

Relationship between phenolic content and antioxidant activity of extracts.

Phytochemical constituent	Pearson correlation
	DPPH^aIC50^b (µg/mL)		FRAP^a mM trolox equivalent (TE)/g fresh weight
	r	Sig. (2-tailed) value	r	Sig. (2-tailed) value
Total phenolic content (mg GAE/g fresh weight)	−0.78	<0.05*	0.88	<0.05*
Total flavonoid (mg RE/g fresh weight)	−0.28	>0.05	0.49	>0.05
Total proanthocyanidins (mg CE/g fresh weight)	−0.40	>0.05	0.54	>0.05

bIC₅₀ is defined as the concentration sufficient to obtain 50% of maximum scavenging activity, expressed as mean ± SD (n = 3). *P < 0.05 is considered as statistically significant. ^aCorrelation coefficient of DPPH-FRAP: r = −0.94, P < 0.05.