Ginkgo Biloba: What the Evidence Actually Says

The tree and the extract

Ginkgo biloba is the last surviving species of an ancient plant order. Supplement extracts are standardised leaf preparations, typically to flavone glycoside and terpene lactone content.

What the research covers

Decades of trials have examined Ginkgo around cerebral circulation, cognitive measures in older adults, tinnitus and peripheral circulation.

The honest summary is that results have not converged. Some large trials found no benefit on cognitive endpoints; others found modest effects. This is a genuine research subject whose findings remain contested rather than an ingredient with nothing behind it.

The interaction that matters most

Ginkgo may affect platelet function, which means it can theoretically increase bleeding risk alongside anticoagulant or antiplatelet medication — warfarin, clopidogrel, apixaban, rivaroxaban or regular aspirin.

It is also a common reason surgical teams ask patients to stop supplements two weeks before a procedure. This is the single most important safety item in most formulas containing it.

Doses used in research

Trials commonly use 120 to 240 mg daily of standardised extract, split across doses. Whether a broad-spectrum formula reaches that range at undisclosed dosing is exactly the sort of thing you cannot know before buying.

The reasonable position

Ginkgo is a legitimate research subject with inconsistent results and one real interaction caution. It is reasonable as a component of a broader formula and unreasonable as a headline reason to buy anything.

If you take anything affecting clotting, this needs your doctor's clearance rather than a website's reassurance.

Keep reading

• Zinc, Magnesium and Testosterone: What the Claims Really Say
• Ashwagandha for Men: What the Research Shows
• Bacopa Monnieri: The Memory Evidence Examined
• Rhodiola Rosea and Mental Fatigue
• Maca Root: Traditional Use, Modern Evidence

Found this useful? The rest of the series is on the Horsewood blog.