Ginkgo biloba extract is a substance extracted from ginkgo, which has the effects of activating blood circulation, removing blood stasis and opening up the channels, and its main functions are to promote blood circulation, antioxidant and anti-aging, and anti-dementia. According to relevant reports, this product has some carcinogenic potential and has been categorized in the category of class B carcinogens. In addition, Ginkgo biloba extract contains ginkgolic acid, which is somewhat toxic, and excessive dosage can cause poisoning. Therefore, the medication should be used in strict accordance with medical advice. This product is a prescription drug, do not buy without authorization to ensure the safety of medication.