What is it used for?
Helps to enhance cognitive function in adults [Source note 2].
Helps to enhance memory in adults [Source note 3].
Helps to support peripheral circulation [Source note 4].
Note: The above uses can be combined on the product label (e.g., Helps to enhance cognitive function in adults and support peripheral circulation).
Who does this guide cover?
Adults 18 years and older
How is it taken?
Oral
Which forms are covered?
this reference excludes foods or food-like dosage forms as indicated in the Compendium of references Guidance Document.
Quantities
Methods of Preparation: Standardized Extracts (Dry extract)
80 - 240 milligrams of extract, per day (quantity crude equivalent 4 - 12 grams of dried leaves), standardized to 22-27% flavonoid glycosides and 5-7% terpene lactones; and providing at least 80 milligrams of extract per single dose [Source note 5].
How is it used?
The reference does not require an additional label statement in this section. This does not establish an absence of risk.
How long is it used?
Products providing 80 mg to less than 120 mg of extract (4 g to less than 6 g dried leaves), per day
Ask a healthcare professional for use beyond 8 months [Source note 6].
Products providing 120 mg to 180 mg of extract (6 g to 9 g dried leaves), per day
Ask a healthcare professional for use beyond 6 weeks [Source note 7].
Products providing more than 180 mg to 240 mg of extract (more than 9 g to 12 g dried leaves), per day
Ask a healthcare professional for use beyond 4 weeks [Source note 8].
Warnings and precautions
Ask a healthcare professional before use if you are pregnant or breastfeeding [Source note 9].
Ask a healthcare professional before use if you are taking diabetes, high blood pressure or seizure medications [Source note 10].
When should it be avoided?
Do not use if you are having a surgery [Source note 11].
Do not use if you are taking blood thinners or other health products that affect blood coagulation [Source note 12].
Possible side effects
The reference does not require an additional label statement in this section. This does not establish an absence of risk.
Storage
Must be established in accordance with the requirements described in the applicable product regulations.
Preparation details
Ingredient identity, preparation requirements, and other details that define the scope of this guide.
Ingredients and preparations
| Proper name(s) | Common name(s) | Source information / Source material(s) | Source information / Part(s) |
|---|---|---|---|
| Ginkgo biloba |
| Ginkgo biloba | Leaf |
References: Proper name: USDA 2024; Common names: USDA 2024; Gardner and McGuffin 2013; WHO 1999; Source information: Birks and Evans 2007.
Other ingredients
Must be chosen from the current source ingredient database and must meet the limitations outlined in the database.
Preparation and quality requirements
The finished product specifications must be established in accordance with the requirements described in the source authority source’s product quality guidance.
The active ingredient must comply with the requirements outlined in the source ingredient database.
Ginkgolic acids: Testing must be performed to ensure that the finished product meets the toxicity restrictions for Ginkgolic acids of not more than 5 ppm (source ingredient database).
Guide change history
Updates to this SupplementSafety.org guide.
Minor updates
Updated guide wording, organization, and source presentation. Added our editorial change history.
Initial release
Initial SupplementSafety.org guide prepared from source reference material.
Validation: Not yet completed. Editorial updates do not constitute clinical validation.
Sources
Source information
This guide organizes source material about uses, preparations, amounts, and precautions. Read the conditions alongside each statement; the information may apply only to particular preparations or populations.
The source document includes supporting references. We have not independently summarized or assessed every cited study for this guide.
- Source document version
- July 25, 2025
- Source captured
- Aug 15, 2026
- Editorial work
- Editorial preparation. Independent clinical review has not been recorded for this guide.
Full citations are available through the link above. Verification is required to open them; reading this guide does not require verification.
Taking a medication too?
Explore our supplement–medication interaction checker. Its coverage and review status are shown with the results; a missing finding does not establish that a combination is safe.