# Ginkgo Biloba Extract (24%/6%)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/ginkgo-biloba-extract-24-6
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-18
**Evidence Score:** 8 / 10
**Category:** Other
**Also Known As:** Ginkgo biloba, Maidenhair Tree, GBE, Ginkgo, Yín Xìng, Bai Guo, Fossil Tree, Temple Tree

## Overview

Ginkgo biloba extract standardized to 24% flavonoid glycosides and 6% terpene lactones improves cerebral blood flow by inhibiting platelet-activating factor and enhancing nitric oxide production. Clinical studies demonstrate 7-12% improvements in [cognitive performance](/ingredients/condition/cognitive) and circulation parameters.

## Health Benefits

- Enhances cognitive function by improving blood flow to the brain, which boosts memory and mental clarity. Studies show a 7% improvement in cognitive performance. - Supports [cardiovascular health](/ingredients/condition/heart-health) by increasing circulation and reducing blood viscosity, which lowers the risk of clot formation. - Acts as a powerful [antioxidant](/ingredients/condition/antioxidant), protecting brain cells from oxidative damage and slowing cognitive decline. - Reduces symptoms of anxiety by modulating [neurotransmitter activity](/ingredients/condition/cognitive), promoting a sense of calm and well-being. - Improves vision health by enhancing blood flow to the eyes, which can slow the progression of age-related macular degeneration. - Supports respiratory health by reducing symptoms of asthma and improving lung function. - Enhances mood by increasing [serotonin](/ingredients/condition/mood) levels, which can alleviate symptoms of depression.

## Mechanism of Action

The standardized extract's flavonoid glycosides (quercetin, kaempferol) and terpene lactones (ginkgolides A, B, C and bilobalide) inhibit platelet-activating factor (PAF) and enhance nitric oxide synthase activity. This dual action reduces blood viscosity while promoting vasodilation through increased cGMP levels. The ginkgolides specifically antagonize PAF receptors, preventing excessive platelet aggregation and improving microcirculation.

## Clinical Summary

Multiple randomized controlled trials involving over 2,000 participants demonstrate ginkgo's [cognitive](/ingredients/condition/cognitive) benefits, with studies showing 7-12% improvements in memory tests and attention span over 12-24 weeks. A meta-analysis of 40 studies found significant improvements in claudication distance (walking ability) by an average of 34 meters. However, large-scale trials for dementia prevention have shown mixed results, with some studies finding no significant difference versus placebo in preventing cognitive decline.

## Nutritional Profile

- Contains flavonoids and terpenoids.
- Rich in [antioxidant](/ingredients/condition/antioxidant)s.
- Contains bilobalide and ginkgolides.

## Dosage & Preparation

Typical dosage ranges from 120 to 240 mg per day. Consult a healthcare provider before use.

## Safety & Drug Interactions

Common side effects include headache, dizziness, and gastrointestinal upset in 2-5% of users. Ginkgo significantly increases bleeding risk when combined with anticoagulants (warfarin, heparin) or antiplatelet drugs (aspirin, clopidogrel) due to its PAF-inhibiting effects. The extract may reduce seizure threshold and should be avoided in epileptic patients. Pregnant and breastfeeding women should avoid ginkgo due to insufficient safety data and potential bleeding complications.

## Scientific Research

Numerous RCTs and meta-analyses support its efficacy in improving [cognitive function](/ingredients/condition/cognitive) and circulation. Studies also indicate potential benefits in reducing anxiety symptoms.

## Historical & Cultural Context

Ginkgo biloba has been used in traditional Chinese medicine for thousands of years. It is one of the oldest living tree species, often referred to as a living fossil.

## Synergistic Combinations

Panax Ginseng, Bacopa Monnieri, Rhodiola Rosea

## Frequently Asked Questions

### What does 24%/6% mean in ginkgo biloba extract?

The standardization indicates 24% flavonoid glycosides and 6% terpene lactones, the two primary active compound groups. This EGb 761 standardization ensures consistent potency and has been used in most clinical studies showing cognitive benefits.

### How long does ginkgo biloba take to work?

Initial circulation improvements may occur within 2-4 weeks, but significant cognitive benefits typically require 6-12 weeks of consistent use at 120-240mg daily. Studies show peak effectiveness occurs after 12-24 weeks of supplementation.

### Can I take ginkgo biloba with blood thinners?

No, ginkgo should not be combined with anticoagulants like warfarin or antiplatelet drugs like aspirin without medical supervision. The combination significantly increases bleeding risk due to ginkgo's platelet-activating factor inhibition.

### What's the optimal dosage of ginkgo biloba extract?

Clinical studies typically use 120-240mg daily of standardized extract (24%/6%), divided into 2-3 doses with meals. Lower doses (40-80mg) are often insufficient for cognitive benefits, while doses above 240mg don't provide additional benefits.

### Does ginkgo biloba help with tinnitus?

Research shows mixed results for tinnitus relief with ginkgo biloba. Some studies found 12-20% improvement in tinnitus severity scores, but larger systematic reviews conclude evidence is insufficient to recommend ginkgo specifically for tinnitus treatment.

### Is ginkgo biloba extract safe for elderly individuals?

Ginkgo biloba extract is generally safe for elderly individuals and may be particularly beneficial due to age-related cognitive decline and reduced circulation. However, seniors should consult their healthcare provider before starting, especially if they take anticoagulants or have bleeding disorders, as ginkgo may increase bleeding risk in this population. Starting with a lower dose is often recommended for older adults to assess tolerance.

### Does ginkgo biloba interact with blood pressure medications?

Ginkgo biloba can potentially interact with blood pressure medications by further reducing blood pressure due to its vasodilating effects, which may increase hypotension risk. While the interaction is not severe for most people, those taking antihypertensive drugs should monitor their blood pressure and inform their healthcare provider of ginkgo use. Regular monitoring ensures the combination remains safe and effective.

### What clinical research evidence supports ginkgo biloba for brain health?

Clinical studies demonstrate that ginkgo biloba extract improves cognitive performance by approximately 7% in healthy adults and shows promise in supporting memory and mental clarity through enhanced cerebral blood flow. Research indicates it acts as a potent antioxidant, protecting neurons from oxidative stress and potentially slowing age-related cognitive decline. However, results vary across studies, and more research is ongoing regarding its effects on specific conditions like dementia prevention.

### What is ginkgo biloba used for?

Ginkgo biloba extract (24%/6%) is primarily used to support cognitive function, memory, and cerebral circulation, particularly in older adults. It is also used for peripheral artery disease, where clinical trials show it can improve walking distance by an average of 34 meters. Additional applications include tinnitus management and age-related vision support, driven by its ability to enhance microcirculation via PAF inhibition and nitric oxide-mediated vasodilation.

### What does the 24%/6% standardization on ginkgo biloba mean?

The 24%/6% designation indicates the extract is standardized to contain 24% flavonoid glycosides (including quercetin and kaempferol) and 6% terpene lactones (ginkgolides A, B, C and bilobalide). This standardization, known as EGb 761, ensures consistent potency and is the specification used in the majority of published clinical trials. Without standardization, raw ginkgo leaf products vary widely in active compound content and may not replicate studied effects.

### Are there any safety concerns or drug interactions with ginkgo biloba?

Ginkgo biloba has antiplatelet properties through PAF receptor antagonism, which raises bleeding risk when combined with anticoagulants like warfarin, aspirin, or NSAIDs. It may also interact with SSRIs and certain anticonvulsants by modulating cytochrome P450 enzyme activity. Most adverse effects are mild (headache, GI upset), but ginkgo should be discontinued at least 36–48 hours before surgery due to its blood-thinning effects.

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