Effect on working memory and brain blood flow by ingestion of ginkgo biloba in healthy volunteers

Effect on working memory and brain blood flow by ingestion of ginkgo biloba in healthy volunteers - Effect on working memory and brain blood flow by ginkgo biloba

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000016618

Enrollment

Registered

2015-02-25

Start date

2015-03-02

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

deterioration of memory, memory loss

Interventions

placebo Ginkgo biloba 120mg Ginkgo biloba 240mg

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. male and female, healthy volunteers 2. the dominant hand is the right underling 3. Nonsmoker

Exclusion criteria

Exclusion criteria: 1.The person who has an anamnesis of hypersensitivity to the active ingredient of ginkgo biloba preparation and this agent 2.The person who took alcohol and medicine, a drink (coffee, energy support drink) containing caffeine within 12 hours 3.The person who uses OTC medicines and prescription medicine routinely 4.Person who does not get enough sleep on the day before 5.The person who ate and drank within two hours prior to start of study

Design outcomes

Primary

Measure	Time frame
working memory and blood flow in brain by using Near Infrared Spectroscopy (NITS)	—

Secondary

Measure	Time frame
blood concentraion of ginkgolide A, B, bilobalide	—

Countries

Japan

Contacts

Public ContactMasayuki Hashiguchi

Keio University Faculty of Pharmacy

hashiguchi-ms@pha.keio.ac.jp03-5400-2120

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026