This tea is one of our best sellers during finals at our local schools. Ginko, Hibiscus, Siberian Ginseng, Gotu Kola, Damanina, Bilberry, Alfalfa, Ginger & Parsley assist the memory. Always use in conjunction with good study habits. Sold in One Oz. packages, larger amounts available by request. Kosher Certified by Kosher Certification Service.