Ginkgo biloba extract is traditionally standardized to 24% flavone glycosides and 6% terpene lactones, a profile that has become the reference point for most cognitive-health formulations.
Buyers should verify both marker groups on the COA, ask about the leaf origin and harvest season, and confirm the extraction process if they target specific markets with regulatory requirements.
For finished-product brands, consistency between batches matters as much as the headline percentages — ask suppliers for multi-batch data.