Table 1.

Polyphenolic composition of blackcurrant leaf extract

	Content [mg/g weight of extract]
Total polyphenolsa	249.2 ± 2.5
Total flavanolsb	169.4 ± 3.2
Total proanthocyanidinsc	152.2 ± 2.5
Hydroxycinnamic acidsd	27.0 ± 0.3
Flavonol derivativese	23.8 ± 0.1
Flavonol aglyconsf
Quercetin	13.6 ± 0.2
Kaempferol	5.4 ± 0.1
Myricetin	0.8 ± 0.0
Gallotanninsg	1.2 ± 0.1

Data shown as a mean ± SE, n = 10

^aDetermined by Folin-Ciocalteu reagent as gallic acid equivalents

^bDetermined by vanillin reagent as (+) catechin equivalents

^cDetermined after acid depolymerization as cyanidin equivalents

^dDetermined by HPLC method at 320 nm as chlorogenic acid equivalents

^eDetermined by HPLC at 360 nm as quercetin equivalents

^fDetermined by HPLC at 360 nm after acid hydrolysis as reference compounds

^gDetermined by HPLC at 280 nm after acid hydrolysis as methyl gallate equivalents