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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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.

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).