The efficacy of stewed duck with Cortex Eucommiae is to tonify qi and yin, nourish the liver and kidney, reduce swelling and relieve water retention. Note that the medicinal diet should not replace medication. Cortex Eucommiae is the bark of the plant Cortex Eucommiae, which is a traditional Chinese medicine, warm in nature, sweet in taste, and belongs to the liver and kidney meridians. It is effective in tonifying the liver and kidney, strengthening the muscles and bones, and stabilizing the fetus. It is used for treating deficiency of liver and kidney, lumbar and knee pain, weakness of muscles and bones, dizziness, leakage of blood in pregnancy, and restlessness of the fetus. Its adverse effects and contraindications are not clear, and caution should be taken when there is a deficiency of yin and fire. Duck meat is flat in nature, sweet in taste and slightly salty. Its effect is to assist in tonifying qi and yin, inducing diuresis and eliminating swelling. It is mainly used for improving weakness of the spleen and stomach, coughing and hemoptysis, yin deficiency and labor heat, edema with dysuria (unsmooth urination). It should not be consumed by people with diarrhea. Stewed Duck with Cortex Eucommiae as a medicinal diet is weak and slow-acting, and cannot be used to treat diseases.