Hello, Ejiao, Radix Rehmanniae Preparata, Fructus Lycii and Fructus Jujubae can be cooked and eaten together. Usually, you can often stew and drink for health and recuperate your body. Ejiao nourishes yin and moistens dryness, nourishes blood and stops bleeding; Rehmannia glutinosa nourishes yin and blood; Lycium barbarum supplements liver and kidney, clearing liver and improving eyesight; Jujube can replenish blood and soothe the nerves. It is recommended to stew with black-bone chicken, 1-2 times a week. I hope my reply is helpful to you.