Only 4 of 10 ginkgo supplements contained their listed amounts of real ginkgo extract and were the best among those we recently selected for testing. In contrast, we discovered a ginkgo supplement that had no more than 3% of its listed ginkgo as well as several supplements that appear to have been adulterated ("spiked") with compounds from other plants — a common trick to make low-quality ginkgo appear to be higher in quality.
Even among products that our tests verified as high quality, there were significant differences in cost, ranging from 9 cents to over $2 for an equivalent amount of ginkgo extract.
You must be a ConsumerLab.com member to get the full test results along with ConsumerLab.com's Top Picks and ConsumerTips on how to choose and use ginkgo supplements. You'll get results for 13 supplements: 10 selected by ConsumerLab.com and three that passed the same testing in our voluntary Quality Certification Program.
You'll get all of the following information about Ginkgo biloba supplements in this comprehensive report:
- Which ginkgo supplements passed or failed testing, and which is ConsumerLab.com's Top Pick for best quality, dose, and value
- How ginkgo supplements compare on quality, ingredients, and cost
- The clinical evidence for ginkgo: what it can and cannot do for your health
- What to look for on labels, including amounts of key ginkgo compounds (flavonol glycosides and terpene lactones)
- Ginkgo dosage for memory, intermittent claudication, Reynaud's syndrome, tension glaucoma, and PMS
- Concerns, drug interactions, and potential side-effects of ginkgo