, purest extract available in the uk longer acting time release prevents any short term mild headaches, meets strictest eu regulations on contaminants convenient one-a-day formulathis product was the original 'ginkgo 6000' & whilst many companies have now copied the name they certainly haven't copied the quality of the ginkgo!ginkgo is believed to improve the circulation to the extremities including the brain & has been shown to improve memory in the short term.this is still the only ginkgo 6000 available in the uk that meets the strict quality requirements of the german monograph which demands that a natural rather unpleasant compound called ginkgolic acid is kept below a strict threshold. no-one else in the uk insists on this grade whilst in germany it is the only one permitted! we also insist on other strict quality standards with the result that we can reject 9 out of 10 ginkgo’s without even seeing them. & we are the only company to design the tablets to be gentle on the tummy by releasing the ginkgo over a period of two hours after swallowing.