🌿 Folk Prescriptions

Yam (Dioscorea opposita) is the tuber of the Dioscorea plant, scientifically named Dioscorea. The best quality comes from Bo'ai, Qinyang, Wuzhi, and Wenxian in Henan Province, historically known as "Huai Yam," one of the famous "Four Huai Medicinals." Yam serves both as a delicious vegetable and a commonly used traditional Chinese medicine.
Dr. Li Zhongxin, Deputy Chief Pharmacist at Henan Provincial Hospital of Traditional Chinese Medicine, notes that yam tastes sweet and is neutral in nature, entering the spleen, lung, and kidney meridians. It offers multiple benefits: strengthening the spleen, nourishing the lungs, consolidating the kidneys, and enriching essence. Its medicinal use dates back to the *Classic of Mountains and Seas*. The first pharmacopeia, *Shennong Bencao Jing* (Han Dynasty), classified yam as a superior herb for "tonifying deficiency, dispelling cold, building muscle, and long-term use enhances hearing and vision." The *Bencao Gangmu* by Li Shizhen states yam "nourishes kidney qi, strengthens the spleen, stops diarrhea, transforms phlegm, and moistens the skin and hair." *Ri Hua Zi Bencao* mentions yam "assists the five organs, strengthens tendons and bones, enhances willpower and mental peace, treats seminal emission and forgetfulness." *Yao Pin Hua Yi* describes yam as "warm and nourishing without sudden effects, slightly fragrant without drying, gently regulating the lungs, ideal for treating chronic cough due to lung deficiency. Due to its sweet taste and fragrance, it aids digestion and treats spleen deficiency diarrhea, fatigue, lethargy, and limb weakness."
Modern TCM commonly uses yam to treat chronic diarrhea due to spleen deficiency, chronic enteritis, pulmonary deficiency cough, chronic gastritis, diabetes, seminal emission, enuresis, and leukorrhea. In folk practices, yam is used to recover from post-illness or postpartum weakness, often yielding excellent results.
Modern scientific analysis reveals yam’s key feature: high content of mucilage. Mucilage is a complex of polysaccharides and proteins, offering unique health benefits: preventing fat deposition in blood vessels, maintaining vascular elasticity, delaying early onset of atherosclerosis. Yam reduces subcutaneous fat accumulation, prevents connective tissue atrophy, and helps prevent rheumatoid arthritis and scleroderma. Many tonics include yam—such as Liuwei Dihuang Wan, Qi Ju Dihuang Wan, Gui Pi Tang, and Shen Ling Bai Zhu San. Yam’s dopamine expands blood vessels and improves circulation. It also contains choline, 16 amino acids, polyphenol oxidase, proteins, carbohydrates, vitamins, fats, amylase, and essential minerals like iodine, calcium, iron, and phosphorus—making it an excellent food for digestion and blood sugar control. Most importantly, for modern women seeking beauty, yam is naturally high in nutrients yet low in calories, allowing generous consumption without fear of weight gain—a truly natural slimming delicacy.
Yam can be prepared in many ways: stir-fried, blanched, boiled, stewed, braised, or roasted—ideal for nutritional meals and therapeutic diets. Dr. Li recommends cooking yam into porridge for long-term use: simple, easy, and maximizes nutritional value. Contraindicated for those with dampness accumulation, fullness, or excess pathogenic factors.
Yam Porridge: 150 grams fresh yam, washed, peeled, cut into chunks. 150 grams glutinous rice, rinsed clean. First boil rice into porridge, add yam chunks when half-cooked, continue until fully cooked. Suitable for spleen deficiency diarrhea, fatigue, lethargy, limb weakness, poor appetite, indigestion, chronic cough due to lung deficiency, kidney deficiency with seminal emission, diabetes, palpitations, night sweats, and leukorrhea. Particularly recommended for middle-aged and elderly individuals in spring.
Yam and Goji Berry Porridge: 200 grams fresh yam, peeled, cut into chunks. 30 grams white rice, rinsed clean. 5 grams sour jujube seeds, washed, lightly crushed, placed in a muslin bag. 30 grams goji berries. First cook yam and jujube seed bag until porridge is about 70% done, then add goji berries and steam until fully cooked. This porridge strengthens the spleen, nourishes lung and kidney essence, calms the mind, and aids sleep.