A double-blind, randomised cross-over study to evaluate the absorption of a commercially available Ginkgo biloba extract compared to the liposomal extract Ginkgosome

Abstract

Background Ginkgo biloba extracts (GBE) have been used in traditional medicines for centuries. GBE has been shown to deliver protective effects against symptoms of age-related cognitive decline. Despite there being standardised extractions for GBE, there is still variability in the absorption and efficacy of different extracts. Following the development of a liposomal GBE (Ginkgosome™), the aim of this study is to investigate the absorption of the liposomal formulation compared to a comparator formulation of equal dose. Methods Thirteen healthy male and female volunteers completed this single equivalent dose, randomised, double-blind crossover study. Plasma concentrations were determined at baseline and at regular intervals over a 24-h period following ingestion of 120 mg of either a liposomal or comparator formulation. Results The liposomal formulation was able to increase plasma concentration of ginkgolide B and C by 1.9 and 2.2-fold compared to the comparator formulation. Conclusion The novel liposomal formulation is safe in humans and demonstrates superior absorption for the supply of GBE constituents compared to a comparator standardised formulation.