Ginkgo Biloba is one of the oldest plants on earth and one of the longest-studied botanicals for cognitive support. The research base spans 30+ years, but most products on the market are dosed too low to match the trials. Here's a UK-focused guide to what Ginkgo actually does, the dose that's been studied, and how to spot a quality extract.
Key takeaways
- Ginkgo Biloba is studied for cognitive function and circulation. Effects emerge over 4 to 12 weeks of daily use, not acutely.
- The research-backed dose is 120 mg to 240 mg per day of standardised extract (typically 24% flavone glycosides + 6% terpene lactones, the "EGb 761" or equivalent specification).
- Most cheap Ginkgo supplements use raw leaf powder, which is dramatically less concentrated than standardised extract. Look for "EGb 761" or specific flavone/terpene percentages.
- Best-known for older adults; healthy younger adults may notice subtler effects.
- Mild blood-thinning effect: speak to your doctor if you're on blood thinners or before surgery.
What Ginkgo Biloba actually is
Ginkgo Biloba is a tree species so old it's sometimes called a "living fossil", its lineage dates back over 200 million years. The supplement uses the dried leaves, which contain two main classes of bioactive compounds:
- Flavone glycosides (mainly quercetin, kaempferol and isorhamnetin glycosides): antioxidant compounds that account for ~24% of standardised extracts.
- Terpene lactones (ginkgolides A, B, C and bilobalide): unique to Ginkgo. Account for ~6% of standardised extracts. Linked to platelet-activating factor inhibition and circulation effects.
The standardised extract used in nearly all major research is called EGb 761, a 50:1 concentration ratio (50 g of leaves to make 1 g of extract). Other extracts may use different specifications but should still meet the 24/6 standard for flavone glycosides and terpene lactones.
What the research suggests
Cognitive function in older adults
The strongest evidence base for Ginkgo is in older adults with age-related cognitive concerns. Multiple randomised trials over 12 to 24 weeks at 240 mg/day of standardised extract have shown statistically significant effects on attention, memory and executive function tests compared to placebo.
Circulation and microcirculation
Ginkgo has been studied for peripheral and cerebral circulation. The terpene lactones (especially ginkgolide B) inhibit platelet-activating factor, which has measurable effects on blood flow at the standard dose.
Subjective focus and mental clarity in healthy adults
Studies in healthy adults are more mixed. Some show modest benefits on attention tasks; others show no significant effect over placebo. The pattern: Ginkgo's effects are more reliable in populations with baseline cognitive concerns than in healthy young adults seeking acute nootropic effects.
What Ginkgo is NOT
- An acute cognitive stimulant. Effects emerge over weeks of daily use.
- A treatment for dementia or Alzheimer's. Some early studies suggested effects, but more recent meta-analyses are mixed. Ginkgo is a daily-routine support, not a clinical treatment.
- A drop-in replacement for caffeine. If you're looking for immediate alertness, Ginkgo isn't it.
The dose that matters
Almost all research-backed effects come from 120 to 240 mg per day of standardised extract:
- 120 mg/day: lower research dose; sufficient for some cognitive support studies
- 240 mg/day: more common dose in older-adult cognitive trials; usually split into 120 mg twice daily
Our Healthier Options Ashwagandha and Lion's Mane Gummies include 1,000 mg of Ginkgo Biloba per serving from a leaf preparation paired with KSM-66 Ashwagandha and Lion's Mane fruiting body. The Ginkgo is part of a stacked daily-routine formula rather than a high-dose cognitive-only product.
How to spot a quality Ginkgo extract
- Look for "standardised to 24% flavone glycosides and 6% terpene lactones", or the proprietary "EGb 761" code.
- Avoid "Ginkgo leaf powder" or "raw Ginkgo extract" with no standardisation specification. These are typically too dilute to match research doses.
- Check the milligram dose per serving. 60 mg of true standardised extract is meaningfully different from 60 mg of raw leaf powder.
- Buy from brands with third-party testing. Ginkgo has historically been adulterated with rutin (a cheaper flavonoid). Quality brands publish CoAs.
What pairs well with Ginkgo for focus
- Lion's Mane: complementary cognitive-support botanical with a different mechanism. See our Lion's Mane evidence guide.
- KSM-66 Ashwagandha: stress response and daily-routine support, which support cognitive performance indirectly. See our KSM-66 deep-dive.
- L-theanine (Suntheanine): acute calm focus; Ginkgo provides the cumulative baseline effect. See our L-theanine guide.
- B-vitamins (B6, B12, folate): foundational for cognitive function; commonly stacked with botanical nootropics.
Timing and adherence
Ginkgo doesn't have a strong "best time of day" effect because it's not a stimulant. Most people take it with breakfast as a daily anchor. The research benefits emerge from consistency over weeks, not perfect timing.
If you're using Ginkgo at the higher 240 mg/day dose, splitting into two 120 mg servings (morning and afternoon) is the protocol used in most research.
Common questions
Can I take Ginkgo before exams or performance?
One-off doses for acute performance aren't well-supported by research. Ginkgo's effects build over weeks. If you have an exam in a month, starting daily use 4 weeks out is more evidence-aligned than taking a high dose the night before.
Are there safety concerns with Ginkgo?
Ginkgo has a mild blood-thinning effect (via platelet-activating factor inhibition). It's generally considered safe at standard doses but:
- Stop Ginkgo at least 7 to 10 days before any planned surgery
- Speak to your doctor if you're on blood thinners (warfarin, aspirin, clopidogrel) or NSAIDs regularly
- Avoid in pregnancy without medical advice
Will Ginkgo make me feel anything immediately?
Most people don't notice acute effects from a single dose. Effects emerge gradually over 4 to 12 weeks of daily use.
Is Ginkgo good for circulation in legs/feet?
There's research on Ginkgo for peripheral arterial disease at 240 mg/day. Effects on subjective leg symptoms have been demonstrated in some trials, but it's a clinical use case that should be discussed with a doctor rather than self-treated.
References
- Le Bars PL et al. "A placebo-controlled, double-blind, randomized trial of an extract of Ginkgo biloba for dementia." JAMA. 1997. PubMed: 9343463.
- Kaschel R. "Specific memory effects of Ginkgo biloba extract EGb 761 in middle-aged healthy volunteers." Phytomedicine. 2011. PubMed: 21802920.
- Tan MS et al. "Efficacy and adverse effects of Ginkgo biloba for cognitive impairment and dementia: a systematic review and meta-analysis." J Alzheimers Dis. 2015. PubMed: 25114079.
Food supplements are not intended to treat, cure or prevent any disease. If you are pregnant, breastfeeding, taking medication, or have a medical condition, consult a healthcare professional before use.
