Fig. 5From: The effects of Berberis vulgaris consumption on plasma levels of IGF-1, IGFBPs, PPAR-γ and the expression of angiogenic genes in women with benign breast disease: a randomized controlled clinical trialA linear correlation between the concentrations of berberine and measured peaks (r > 0.999). Chromatograms of berberine (40 μg mL-1) in the aqueous sample (a) and berberine in BV juice after 20 fold dilution by water (b)Back to article page