Table 1.

General characteristic of the evening primrose polyphenol extract

	Content (mg/g dry extracts)
Total polyphenolsa	611.55 ± 33.05
Total flavan-3-olsb	125.44 ± 2.15
Gallotanninsc	62.04 ± 1.17

Values are expressed as mean ± SD, n ≥ 3

^aDetermined by Folin-Ciocalteu reagent as (+)-catechin equivalents

^bDetermined by vanillin reagent as (+)-catechin equivalents

^cDetermined by HPLC at 280 nm as methyl gallate