2. Although Ginkgo biloba is rich in nutrition, it has the functions of relieving cough, eliminating phlegm, stopping leukorrhagia, resisting aging and protecting cardiovascular system. However, Ginkgo biloba contains ginkgolic acid, hydrogenated ginkgolic acid and other toxic substances, which will lead to poisoning. Under normal circumstances, adults should not exceed 10 capsules per day, children should not exceed 5 capsules, and infants should not eat them.