Yes, you can take bacopa and ginkgo together. No known dangerous interaction exists between the two herbs, and they’ve even been tested as a combined supplement in clinical trials. That said, the evidence for any added cognitive benefit from pairing them is surprisingly weak, and there are a few practical considerations worth understanding before you stack them.
What the Clinical Evidence Actually Shows
The most direct evidence comes from a randomized, double-blind, placebo-controlled trial that tested a combined extract of ginkgo biloba (120 mg) and bacopa (300 mg) in 85 healthy adults. Participants took the combination daily for four weeks and were tested on attention, short-term memory, working memory, verbal learning, memory consolidation, problem solving, processing speed, and decision making. The result: no significant cognitive improvements compared to placebo on any measure, at either the two-week or four-week mark.
That’s a notable finding, because both herbs have shown positive effects individually in other studies. The combination didn’t appear to be greater than the sum of its parts. One likely explanation is timing. Bacopa typically needs much longer to produce measurable effects than ginkgo does, and four weeks may not have been enough to capture its contribution.
Bacopa Needs Months, Not Weeks
Multiple trials have found that bacopa’s cognitive benefits don’t appear until roughly 8 to 12 weeks of daily use. In one study of healthy volunteers taking 300 mg daily, researchers saw significant improvements in verbal learning and memory at 12 weeks but not at 5 weeks. A separate three-month trial in adults aged 40 to 65 showed improved retention of new information, specifically in delayed recall of word pairs. A third trial in adults over 55 with age-related memory concerns found improvements on memory tests at 12 weeks, with those gains persisting even four weeks after stopping the supplement.
This slow onset is a defining characteristic of bacopa. If you’re combining it with ginkgo and expecting quick results, you’ll likely be disappointed. Ginkgo may produce effects sooner, but bacopa appears to require sustained, daily use over several months before it meaningfully influences memory.
How They Work Differently in the Brain
The theoretical case for combining bacopa and ginkgo rests on the fact that they influence brain function through overlapping but distinct pathways. Understanding these helps explain why some people still choose to take both.
Bacopa works primarily by boosting acetylcholine, a neurotransmitter essential for learning and memory. It does this by activating the enzyme that produces acetylcholine rather than just blocking its breakdown. Bacopa also acts as a potent antioxidant in the brain, increasing levels of glutathione, vitamin C, and vitamin E while activating protective cellular pathways. It influences serotonin and dopamine signaling as well, which may explain why some trials have noted reductions in anxiety alongside cognitive improvements. In lab studies, bacopa has also been shown to nearly completely inhibit the formation of beta-amyloid, the protein fragment linked to Alzheimer’s disease.
Ginkgo’s primary role is increasing blood flow to the brain. Animal studies have shown it can boost cerebral blood flow by about 29%. It also inhibits the enzyme that breaks down acetylcholine, though through a different mechanism than bacopa’s primary action. Both herbs increase acetylcholine activity, but they do it from different angles: bacopa ramps up production while ginkgo slows breakdown.
Bacopa also increases cerebral blood flow through a separate mechanism, releasing nitric oxide from blood vessel walls. So while the two herbs share some targets, they reach them through different biological routes.
Side Effects to Watch For
Both herbs are generally well tolerated, but they share a tendency to cause digestive discomfort. Ginkgo’s most common side effects are dizziness, gastrointestinal symptoms, and headache. Bacopa is similarly known for causing nausea, stomach cramps, and bloating, particularly when taken on an empty stomach. Taking both together could increase the likelihood of gut-related side effects, so it’s worth taking them with food.
The more important safety concern involves ginkgo and blood clotting. Ginkgo has known anticoagulant and antiplatelet properties. While a systematic review found no significant effect on standard clotting measures, several case reports have documented a connection between ginkgo use and bleeding events, including serious intracranial bleeding. The risk increases when ginkgo is combined with aspirin or prescription blood thinners. If you take any medication that affects clotting, ginkgo adds a layer of risk that bacopa does not.
There are also case reports of ginkgo precipitating seizures in two patients with previously well-controlled epilepsy, both within two weeks of starting the supplement. This is a narrow but serious concern for anyone with a seizure disorder.
Typical Dosages Used Together
The clinical trial that tested the combination used 120 mg of ginkgo biloba extract and 300 mg of bacopa extract daily. These are standard dosages that match what most individual studies use for each herb on its own. Many combination supplements on the market use similar amounts.
For bacopa specifically, 300 mg of a standardized extract (typically standardized to 50% bacosides) is the most commonly studied dose. For ginkgo, 120 mg to 240 mg of standardized extract (typically EGb 761 or equivalent) is the usual range. There’s no established evidence that higher doses of either herb produce better results when combined.
Is the Combination Worth It?
The honest answer is that the science hasn’t proven the combination is better than taking either herb alone. The only controlled trial testing them together found no cognitive benefit over placebo at four weeks, though that timeframe was likely too short for bacopa to contribute. No study has tested the pair over the 12-week window that bacopa appears to need.
The mechanistic logic is reasonable: two herbs that boost acetylcholine through different mechanisms while both increasing brain blood flow could, in theory, complement each other. But “could in theory” is different from “does in practice,” and right now the clinical data doesn’t confirm synergy. If you do choose to take both, plan on at least three months before evaluating whether the combination is doing anything for you, take them with food to minimize stomach upset, and be cautious if you use any medications that affect blood clotting.