In Vitro Antioxidant and In Vivo Lipid-Lowering Properties of Zingiber officinale Crude Aqueous Extract and Methanolic Fraction: A Follow-Up Study

Table 1

Polyphenols and flavonoid contents and antioxidant activities (RSA and β-carotene) of Z. officinale.

	Z. officinale extracts		Standards
	ZOAE	ZOMF	AA	BHA
Polyphenols (mg eq gallic acid/g Ext)	15.34 ± 2.21	27.12 ± 3.08	-	-
Flavonoids (mg eq quercetin/g Ext)	4.20 ± 1.23	11.67 ± 2.86	-	-
RSA (IC50 (μg/mL))	23.30 ± 1.04	9.78 ± 0.33	1.83 ± 0.01	-
β-carotene (IC50 (μg/mL))	128.41 ± 9.85	71.55 ± 2.17	-	2.20 ± 0.05

All values were expressed as mean ± standard error of the mean; a: expressed as mg gallic acid equivalent/g of dry plant extract; b: expressed as mg quercetin equivalent/g of dry plant extract. a: p < 0.001; c: p < 0.05; b: p < 0.01; NS: not significant.