Table 2.

Characteristics of included studies, sources, dosage and duration of ginkgo biloba

	Ginkgo biloba extract source	Dose	Days of treatment prior to ascent
Roncin et al,15 1996	Tanakan DCI: EGb 761, Ipsen, Paris, France	60 mg twice daily	0
Gertsch et al,16 2002	GK501 Memfit, EGb 761, Pharmaton	60 mg three times a day	1
Gertsch et al,17 2004	GK501 International, Pharmaton	120 mg twice daily	1–2
Chow et al,18 2005	Ginkgo biloba 120 mg, Vegetarian NOW Foods	120 mg twice daily	5
Moraga et al,13 2007	EGb 761 Rokan, Andromaco Laboratories, Chile	80 mg twice daily	1
Leadbetter et al,19 2009, study 1	Spectrum Quality, Laboratories Products	120 mg twice daily	4
Leadbetter et al,19 2009, study 2	Technical Sourcing	120 mg twice daily	3