Abstract
Ginkgo biloba extract (GBE) is an essential herbal supplement for diverse health perspectives. The present study aims to improve the oral bioavailability of GBE flavonoids. We formulated the GBE flavonoids-cyclodextrin (GBE-CD) complex by reacting GBE flavonoids with naringinase in the presence of γ-cyclodextrin (CD) using a patented method. The results showed an enhanced bioavailability of quercetin (QCT), kaempferol (KAE), and isorhamnetin (ISR) after β-glucuronidase catalysis of flavonoid glucuronide conjugates in plasma after GBE-CD (25 μmol/kg as QCT equivalence) administration, that was 5.4, 6.1, and 10.4-folds, respectively, compared to GBE administration (25 μmol/kg as QCT equivalence) in Sprague–Dawley rats. In summary, the GBE inclusion into the γ-CD cavity is found suitable to improve oral bioavailability and could be applicable to several health benefits and disease prevention.
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