Hermetica Superfood Encyclopedia
Ginkgo biloba contains ginkgolides and flavonoids that may influence blood circulation and neural signaling pathways. The extract has been traditionally used for cognitive support, though clinical evidence remains limited.
Origin & History
Ginkgo biloba is a deciduous tree native to China, with leaves serving as the primary source for medicinal extracts in global traditional herbal medicine. Extracts are produced through aqueous acetone or ketone extraction, followed by purification steps including alkalinization, acidification, and liquid-liquid extraction, yielding standardized extracts enriched in terpene trilactones and flavonoids.
Scientific Research
The research dossier explicitly states that search results lack specific details on human clinical trials, RCTs, or meta-analyses for Ginkgo biloba. No PMIDs, study designs, sample sizes, or clinical outcomes are available in the provided sources.
Preparation & Dosage
No clinically studied dosage ranges are available in the research dossier for any form of Ginkgo biloba. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Ginkgo biloba leaf extracts are standardized primarily for bioactive compounds rather than macronutrient content. The standardized extract (EGb 761) is concentrated to contain 24% flavone glycosides (primarily quercetin, kaempferol, and isorhamnetin glycosides) and 6% terpene lactones (comprising approximately 2.8–3.4% ginkgolides A, B, C, and J, plus 2.6–3.2% bilobalide). Raw dried ginkgo leaves contain approximately 0.5–1.0% flavonoids by dry weight. Ginkgolide B, the most pharmacologically studied terpene lactone, is present at roughly 0.03–0.12% in dried leaf material. Bilobalide constitutes approximately 0.1–0.25% of dried leaf weight. Ginkgo seeds (bai guo) contain carbohydrates (~38g/100g dry weight), protein (~4–5g/100g), fat (~1.5–2g/100g), and small amounts of ginkgotoxin (4-O-methylpyridoxine), a neurotoxic compound that increases in concentration with seed maturity; consumption of raw seeds is associated with toxicity risk. Mineral content of seeds includes potassium (~510mg/100g), phosphorus (~130mg/100g), and magnesium (~27mg/100g). Flavonoid bioavailability from standardized extracts is moderate, with quercetin glycosides reaching peak plasma concentrations within 2–3 hours post-ingestion; co-administration with dietary fat modestly enhances absorption. Ginkgolic acids (alkylphenols), considered allergenic and potentially cytotoxic, are present in raw plant material but are reduced to below 5 ppm in pharmaceutical-grade extracts per European Pharmacopoeia standards. Dietary fiber is negligible in leaf extracts but present at approximately 2–3g/100g in whole seeds.
How It Works
Ginkgolides act as platelet-activating factor (PAF) antagonists, potentially affecting blood flow and inflammatory processes. Flavonoids including quercetin and kaempferol may provide antioxidant activity and influence nitric oxide pathways. These compounds may also modulate neurotransmitter systems including acetylcholine and dopamine.
Clinical Evidence
Available research lacks sufficient randomized controlled trials to establish definitive clinical benefits for ginkgo biloba. While some studies have examined cognitive function and circulation, the research dossier contains no meta-analyses or robust RCTs with clear positive outcomes. Most clinical claims remain unsupported by high-quality human trial data. Further research is needed to validate traditional uses and establish effective dosing protocols.
Safety & Interactions
Ginkgo biloba may increase bleeding risk and should be avoided with anticoagulant medications like warfarin and heparin. Common side effects include headache, dizziness, and gastrointestinal upset. The supplement may interact with seizure medications and should be discontinued before surgery due to bleeding concerns. Pregnant and breastfeeding women should avoid ginkgo due to insufficient safety data.
Also Known As
Frequently Asked Questions
What is the recommended dosage of ginkgo biloba extract?
How long does ginkgo biloba take to work?
Can ginkgo biloba cause bleeding problems?
What are ginkgolides and how do they work?
Is ginkgo biloba safe for elderly people?
Does ginkgo biloba interact with blood thinners like warfarin or aspirin?
Is ginkgo biloba safe during pregnancy and breastfeeding?
Are there different forms of ginkgo biloba extract, and do they differ in quality?
Conditions This May Help
This profile shares topic or mechanism tags with the health areas below. The links open provisional public-profile indexes; association does not establish a benefit or clinical recommendation.
Or jump to the curated Cognitive Function & Focus Profile Collection → a provisional discovery list with review-state disclosure.
Research updates — and 25% off your first order
Join our list for source-aware wellness education, review-state updates, and product news — and unlock 25% off your first Hermetica order. Educational content is not medical advice. No spam, unsubscribe anytime.