This site names Ginkgo Biloba for two distinct roles — memory and circulation — worth understanding the circulation half specifically, on its own.
Ginkgo Biloba is described as a time-honoured brain botanical that supports healthy circulation to the brain, alongside memory and mental clarity — worth reading circulation as a distinct mechanism from Ginkgo's memory role.
This site is direct that Ginkgo has documented blood-thinner interaction potential — worth reading that caution specifically alongside this circulation mechanism, since both concern how Ginkgo affects blood flow.