# Ginkgo Biloba (Ginkgo biloba) **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/ginkgo-biloba **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-19 **Evidence Score:** 8 / 10 **Category:** Traditional Chinese Medicine **Also Known As:** Ginkgo biloba, Maidenhair tree, Living fossil tree, Yinhsing, Bai guo, Silver apricot, EGb 761, Fossil tree ## Overview Ginkgo biloba contains flavonoids and terpenoids that enhance cerebral blood flow and provide neuroprotection. Clinical studies demonstrate significant [cognitive](/ingredients/condition/cognitive) improvements in Alzheimer's patients and enhanced daily living activities in dementia. ## Health Benefits • Improves [cognitive function](/ingredients/condition/cognitive) in Alzheimer's patients (Strong evidence: meta-analysis of 7 RCTs, N=939, showing RR=1.98 for cognitive improvement) • Enhances activities of daily living in dementia (Moderate evidence: meta-analysis of 4 RCTs, N=782, showing significant ADL improvements p=0.01) • Increases walking distance in peripheral arterial disease (Moderate evidence: meta-analysis of 5 RCTs showing effect size=0.75, P<0.001) • Improves quality of life in mild dementia patients (Moderate evidence: 4 RCTs showing QoL improvements p=0.02) • Reduces neuropsychiatric symptoms in dementia (Moderate evidence: multiple RCTs showing NPI/SKT improvements with 240mg/day) ## Mechanism of Action Ginkgo biloba's flavonoids (quercetin, kaempferol) and terpenoids (ginkgolides A, B, C) enhance cerebral blood flow by inhibiting platelet-activating factor and improving [endothelial function](/ingredients/condition/heart-health). The compounds also provide neuroprotection through [antioxidant activity](/ingredients/condition/antioxidant) and modulation of [neurotransmitter](/ingredients/condition/cognitive) systems including acetylcholine and [dopamine](/ingredients/condition/mood). ## Clinical Summary A meta-analysis of 7 randomized controlled trials (N=939) showed ginkgo biloba nearly doubled the likelihood of [cognitive](/ingredients/condition/cognitive) improvement in Alzheimer's patients (RR=1.98). Another meta-analysis of 4 RCTs (N=782) demonstrated significant improvements in activities of daily living among dementia patients (p=0.01). Most studies used standardized EGb 761 extract at 120-240mg daily for 12-52 weeks, showing moderate to strong evidence for cognitive benefits. ## Nutritional Profile Ginkgo biloba leaf extract is not a significant source of macronutrients (negligible protein <1%, fats <1%, carbohydrates minimal in standardized extracts). Its profile is defined by standardized bioactive compounds: **Flavonoid glycosides (24% in EGb 761 standardized extract)** — primarily quercetin glycosides (~9-10 mg/g), kaempferol glycosides (~8-9 mg/g), and isorhamnetin glycosides (~2-3 mg/g); these are hydrolyzed to aglycones post-absorption with moderate bioavailability (~70-80% for quercetin derivatives). **Terpene lactones (6% in EGb 761)** — ginkgolides A, B, C, J (total ~3.1-3.4 mg/g) and bilobalide (~2.6-2.9 mg/g); ginkgolide B is the most pharmacologically active PAF antagonist; oral bioavailability of ginkgolides ~80%, bilobalide ~72%. **Ginkgolic acids** — potentially toxic alkylphenols, regulated to <5 ppm (<5 µg/g) in quality extracts (USP/EMA standard). **Proanthocyanidins** — present at ~7% in crude leaf, reduced in standardized extracts; include catechin and epicatechin oligomers. **Other polyphenols** — biflavonoids (amentoflavone, bilobetin, ginkgetin) at ~0.2-0.5 mg/g; notable as CYP3A4 inhibitors but poorly bioavailable (~20-30%) due to low solubility. **Minerals** — trace amounts: potassium (~3.2 mg/g dry leaf), calcium (~8.1 mg/g dry leaf), magnesium (~2.1 mg/g dry leaf); negligible in concentrated extracts. **Vitamins** — minimal: trace vitamin C (~0.5-1.2 mg/g in fresh leaf, degraded in extract processing), trace beta-carotene. **Fiber** — crude leaf contains ~15-18% dietary fiber, essentially absent in standardized liquid/tablet extracts. Standard clinical dose of 120-240 mg EGb 761 extract delivers approximately 28.8-57.6 mg flavonoid glycosides and 7.2-14.4 mg terpene lactones. Bioavailability is enhanced by lipid co-administration for terpene lactones; Tmax for ginkgolide B ~2 hours, half-life ~4-4.5 hours; Tmax for flavonol aglycones ~1.5-2.5 hours post-hydrolysis. ## Dosage & Preparation Standardized EGb 761 extract (24% flavone glycosides, 6% terpene lactones): 120-240mg daily for dementia/Alzheimer's disease, typically administered as 240mg/day for mild dementia or 120mg/day for longer-term use. For peripheral artery disease: 120mg/day. For neuropsychiatric symptoms: 160-240mg/day over 24 weeks. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Ginkgo biloba may increase bleeding risk and should be avoided with anticoagulants like warfarin and aspirin. Common side effects include headache, dizziness, and gastrointestinal upset in 2-10% of users. The supplement may interact with seizure medications and should be discontinued 2 weeks before surgery. Pregnancy and breastfeeding safety data is insufficient, making use inadvisable during these periods. ## Scientific Research Multiple meta-analyses support Ginkgo biloba for [cognitive](/ingredients/condition/cognitive) impairment, with a 2020 analysis of 7 RCTs (N=939, PMID: 32658034) showing nearly double the cognitive improvement versus placebo. A 2023 meta-analysis of 18 RCTs (N=1,642, PMID: 36960422) demonstrated that combining Ginkgo with donepezil was superior to donepezil alone (RR=1.23), while a 2015 analysis of 21 RCTs (N=2,608, PMID: 26268332) found significant MMSE improvements. ## Historical & Cultural Context Ginkgo biloba has been used in Chinese traditional medicine for centuries for [cognitive](/ingredients/condition/cognitive) and circulatory issues. Modern standardized extracts like EGb 761 have been applied long-term for vascular dementia and Alzheimer's disease, bridging ancient wisdom with contemporary clinical applications. ## Synergistic Combinations Donepezil, Omega-3 fatty acids, Phosphatidylserine, Vitamin E, B-complex vitamins ## Known Interactions | Substance | Severity | Summary | URL | |---|---|---|---| | 90 | MAJOR | 🔴 CAUTION — Major interaction between Ginkgo Biloba and Warfarin. Avoid unless under direct medical supervision. | https://ingredients.hermeticasuperfoods.com/interactions/90 | | 91 | MAJOR | 🔴 CAUTION — Major interaction between Ginkgo Biloba and Apixaban. Avoid unless under direct medical supervision. | https://ingredients.hermeticasuperfoods.com/interactions/91 | | 92 | MAJOR | 🔴 CAUTION — Major interaction between Ginkgo Biloba and Rivaroxaban. Avoid unless under direct medical supervision. | https://ingredients.hermeticasuperfoods.com/interactions/92 | | 93 | MAJOR | 🔴 CAUTION — Major interaction between Ginkgo Biloba and Clopidogrel. Avoid unless under direct medical supervision. | https://ingredients.hermeticasuperfoods.com/interactions/93 | | 94 | MAJOR | 🔴 CAUTION — Major interaction between Ginkgo Biloba and Aspirin. Avoid unless under direct medical supervision. | https://ingredients.hermeticasuperfoods.com/interactions/94 | | 105 | MODERATE | 🟡 USE CAUTION — Ginkgo Biloba and Ibuprofen may interact. Talk to your doctor before combining. | https://ingredients.hermeticasuperfoods.com/interactions/105 | | 106 | MODERATE | 🟡 USE CAUTION — Ginkgo Biloba and Naproxen may interact. Talk to your doctor before combining. | https://ingredients.hermeticasuperfoods.com/interactions/106 | | Omega-3 Fish Oil | SAFE | 🟢 SAFE — Ginkgo Biloba and Omega-3 Fish Oil can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/omega-3-fish-oil | | Melatonin | SAFE | 🟢 SAFE — Ginkgo Biloba and Melatonin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/melatonin | | Collagen | SAFE | 🟢 SAFE — Ginkgo Biloba and Collagen can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/collagen | | Probiotics | SAFE | 🟢 SAFE — Ginkgo Biloba and Probiotics can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/probiotics | | CoQ10 | SAFE | 🟢 SAFE — Ginkgo Biloba and CoQ10 can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/coq10 | | Quercetin | SAFE | 🟢 SAFE — Ginkgo Biloba and Quercetin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/quercetin | | Milk Thistle | SAFE | 🟢 SAFE — Ginkgo Biloba and Milk Thistle can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/milk-thistle | | Echinacea | SAFE | 🟢 SAFE — Ginkgo Biloba and Echinacea can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/echinacea | | Elderberry | SAFE | 🟢 SAFE — Ginkgo Biloba and Elderberry can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/elderberry | | Berberine | SAFE | 🟢 SAFE — Ginkgo Biloba and Berberine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/berberine | | Kratom | SAFE | 🟢 SAFE — Ginkgo Biloba and Kratom can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/kratom | | Kava | SAFE | 🟢 SAFE — Ginkgo Biloba and Kava can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/kava | | Magnesium | SAFE | 🟢 SAFE — Ginkgo Biloba and Magnesium can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/magnesium | ## Frequently Asked Questions ### How much ginkgo biloba should I take for memory? Clinical studies typically use 120-240mg daily of standardized EGb 761 extract containing 24% flavone glycosides and 6% terpene lactones. Most cognitive benefits were observed with 240mg daily divided into 2-3 doses with meals. ### How long does ginkgo biloba take to work? Cognitive improvements from ginkgo biloba typically begin after 4-6 weeks of consistent use. Maximum benefits are usually observed after 12-24 weeks of supplementation based on clinical trial data. ### Can I take ginkgo biloba with blood thinners? No, ginkgo biloba should not be combined with anticoagulants like warfarin, heparin, or antiplatelet drugs like aspirin. The combination significantly increases bleeding risk due to ginkgo's platelet-activating factor inhibition. ### What is the difference between ginkgo leaf and extract? Standardized ginkgo extract (EGb 761) contains concentrated active compounds at 24% flavonoids and 6% terpenoids, while raw leaf powder has variable potency. Clinical studies exclusively use standardized extracts, not raw leaf preparations. ### Does ginkgo biloba help with tinnitus? Evidence for ginkgo biloba treating tinnitus is mixed and limited. A Cochrane review found insufficient evidence to support its use for tinnitus, with most high-quality studies showing no significant benefit over placebo. ### What does clinical research show about ginkgo biloba for Alzheimer's disease? Meta-analyses of randomized controlled trials demonstrate that ginkgo biloba significantly improves cognitive function in Alzheimer's patients, with a relative risk of 1.98 for cognitive improvement based on 7 RCTs involving 939 participants. Additionally, studies show moderate evidence that ginkgo enhances activities of daily living in dementia patients, with meta-analyses of 4 RCTs (N=782) demonstrating statistically significant improvements (p=0.01). However, benefits typically emerge after several weeks of consistent use, and results vary among individuals. ### Is ginkgo biloba safe for elderly patients? Ginkgo biloba is generally well-tolerated in elderly populations and is frequently studied in geriatric populations with cognitive concerns, making it a commonly recommended option for age-related memory support. However, older adults should be cautious if taking antiplatelet or anticoagulant medications, as ginkgo may have mild anticoagulant properties that could increase bleeding risk. Consulting with a healthcare provider is especially important for elderly individuals on multiple medications to ensure safe co-administration. ### Can ginkgo biloba help with circulation and leg pain from poor blood flow? Yes, clinical research shows moderate evidence that ginkgo biloba increases walking distance in patients with peripheral arterial disease, based on meta-analyses of 5 RCTs examining its vascular benefits. This effect is thought to result from ginkgo's ability to improve blood circulation and reduce claudication symptoms, making it potentially beneficial for individuals experiencing leg pain or cramping during walking. Regular supplementation is typically required to observe these circulatory improvements, and results may vary depending on disease severity. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*