Procyanidin B1 is detected in human serum after intake of proanthocyanidin-rich grape seed extract.
2003
To confirm the absorption of proanthocyanidin (PA) into the human body, four healthy adults were administered 2.0 g of PA-rich grape seed extract (GSE). Blood were drawn before intake and 2 h after intake. Through the enzymatic treatment of sulfatase and β-glucuronidase, blood samples were analyzed by HPLC coupled with mass-spectrometry (LC/MS). Procyanidin B1 [epicatechin-(4β→8)-catechin] was detected in human serum 2 h after intake. Its concentration was 10.6±2.5 nmol/l.
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