Table 1.

Antioxidant activity of whole purple grape juice and the placebo drink

	Grape juice	Placebo
DPPH (µMol Trolox/mL)	13.0	8.1
ABTS (ATT µMol Trolox/mL)	9.5	ND
Total phenolics (mg/L)	3106.6	939.5
Flavanois (mg/L)	13.0	–
Flavonois (mg/L)	5.3	–
Phenolic Acids (mg/L)	83.8	1.6
Stilbenes (mg/L)	2.1	–

DPPH 2.2-diphenyl-1-picryl-hydrazyl, ABTS 2.2′-azinobis-3-ethylbenzthiazoline-6 sulfonic acid, ND not detected, HPLC high-performance liquid chromatography, EMBRAPA empresa brasileira de pesquisa agropecuária