Educational dose math only — not medical advice, not a product recommendation, and not a pass/fail on whether a supplement will work for you.
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Trial reference

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120-240 mg per day of standardized EGb 761 (24% ginkgo flavone glycosides) is the extract standard nearly the whole evidence base was built on. Kang 2002, a small early RCT in 37 adults on fluoxetine or paroxetine, was positive; three later RCTs were null, which is why the effect direction here reads null. This floor is about the extract and dose standard, not a promise of effect.

Educational only — not medical advice. Disclaimer.

Want the outcome before the arithmetic? The reason check opens any registry entry on this page with its trial result first, then compares your daily intake with the studied amount.

NIH DSLD market slice

Median60 mg
Products2,688
Below66%

Bulk CSV dump 16 January 2026 · label entries through 2025. Disclosed amounts only — proprietary blends without gram weights excluded.

Trial floors

Primary

Standardized EGb 761 extract (Kang 2002) · 120–240 mg over 8+ weeks (limited evidence · how we grade this) · Primary endpoint missed — 120-240 mg per day of standardized EGb 761 (24% ginkgo flavone glycosides) is the extract standard nearly the whole evidence base was built on. Kang 2002, a small early RCT in 37 adults on fluoxetine or paroxetine, was positive; three later RCTs were null, which is why the effect direction here reads null. This floor is about the extract and dose standard, not a promise of effect.

Secondary

900 mg open-label pilots (historical only) · 900 mg over 4-8 weeks (limited evidence · how we grade this) · Primary endpoint missed — Ashton 2000 and Cohen 1998, open-label pilots at 900 mg per day. Kept as historical context only: we do not present 900 mg as a target, and the controlled trials at the standard dose did not replicate the pilots.

Safety red flags

  • On warfarin, a DOAC, aspirin, or any antiplatelet drug: talk to the prescriber who manages those drugs before starting ginkgo.
  • Stop and call a clinician for any unusual bruising, nosebleeds, blood in stool or urine while using it.

Label reading notes

  • Compare the label with 120-240 mg per day of EGb 761-style standardized extract; "ginkgo leaf powder" is a different product category.
  • Honest scope: for antidepressant-associated sexual dysfunction the controlled trials came back null. This page is about dose, not about promising an effect.
  • On warfarin, DOACs, or antiplatelet drugs the pairing raises bleeding risk (VA cohort: +38% with warfarin, Stoddard 2015, PMID 26958257, tracked in our interaction base).