White Hyacinth Bean and Chinese Yam Pork Spine Soup Recipe

Introduction to Medicated Diet

White Hyacinth Bean and Chinese Yam Pork Spine Soup is a well-known traditional nourishing soup widely consumed in the Lingnan region, and a representative spleen-fortifying dampness-dispelling medicinal dish in Cantonese cuisine. This soup features white hyacinth bean (Lablab purpureus), Chinese yam (Dioscorea opposita), and pork spine as its core ingredients, supplemented with honey dates and tangerine peel (Citri Reticulatae Pericarpium). It is slowly simmered over low heat, resulting in a clear broth with a mellow flavor and a subtle bean fragrance balanced with a hint of sweetness. In areas such as Guangdong and Guangxi, during the transition from spring to summer or the rainy season, many families prepare this soup to help the whole family navigate the dampness-heavy season with ease.

The brilliance of this medicinal food lies in the skillful integration of food ingredients with substances that are both edible and medicinal. White hyacinth bean (Semen Lablab Album), known as the “Spleen grain,” excels at resolving dampness and harmonizing the Middle Burner; Chinese yam (Rhizoma Dioscoreae) has been regarded by physicians through the ages as a superior herb for “tonifying the Spleen and Lung, and securing the Kidney essence.” Pork spine, rich in collagen and calcium, not only enhances the savory flavor of the soup but also provides essential nutritional support for the body. The combination of these three ingredients achieves a balance of expelling dampness without damaging the upright qi, and tonifying without causing cloying greasiness, while also ensuring the soup is both delicious and health-promoting. It serves as a classic example of “embedding medicine in food” in ordinary households.

Efficacy of Medicinal Diet

The core efficacy of White Hyacinth Bean (Lablab purpureus) and Chinese Yam (Dioscorea opposita) simmered with Pork Spine Bones lies in strengthening the Spleen (Pi) and resolving Dampness (Shi), as well as harmonizing the Middle Burner (Zhongjiao) and stopping diarrhea. For symptoms caused by Spleen Deficiency with Dampness Overabundance (Pi Xu Shi Sheng)—such as poor appetite, loose stools, heavy and sluggish body, and sallow complexion—this soup provides highly suitable regulation. Additionally, it helps alleviate issues like indigestion and postprandial abdominal distension resulting from weak Spleen and Stomach (Pi Wei) transportation and transformation functions, thereby aiding the body in restoring normal digestive and absorptive capacities. From a nutritional perspective, the collagen and calcium provided by the pork spine bones support the strengthening of sinews and bones, while the mucilage in Chinese yam contributes positively to maintaining the health of the gastrointestinal mucosa.

In addition to its basic function of strengthening the Spleen and resolving Dampness, this medicinal food also has the effects of benefiting the Kidney and securing Essence, as well as supplementing the Middle and boosting Qi. Chinese Yam (Dioscorea opposita) enters the Lung (LU), Spleen (SP), and Kidney (KI) meridians, and can simultaneously supplement the Upper, Middle, and Lower Jiao. It also provides some improvement for manifestations of Kidney Qi not secure, such as soreness and weakness of the lower back and knees, and frequent urination at night. When consumed in moderation over the long term, it can gradually strengthen the body’s Righteous Qi and enhance the ability to resist external pathogens. It is especially suitable for daily regulation in individuals with constitutional weakness, those prone to catching colds, and those who recover slowly after illness. Overall, this soup is a mild and comprehensive nourishing medicinal food, focusing on regulating the Spleen and Stomach functions rather than vigorous supplementation or aggressive attacking.

The Role of Traditional Chinese Medicine

From the perspective of Traditional Chinese Medicine theory, the mechanism of action of the soup of white hyacinth bean (Semen Lablab Album) and Chinese yam (Rhizoma Dioscoreae) with pork spinal bones can be understood from the following three aspects.

Strengthen the Spleen and Transform Dampness

Semen Lablab Album (white hyacinth bean) is slightly warm in nature and sweet in taste, returning to the Spleen and Stomach meridians. It is a commonly used clinical herb in TCM for resolving dampness and harmonizing the Middle Jiao. *Ben Cao Gang Mu* (Compendium of Materia Medica) records that it can “stop diarrhea, clear summerheat, and warm the Spleen and Stomach.” In formulas, Semen Lablab Album primarily serves to “dry dampness and strengthen the Spleen,” effectively clearing dampness pathogen that obstructs the Middle Jiao and restoring the transportation and transformation functions of the Spleen and Stomach. When combined with Rhizoma Dioscoreae (Chinese yam), one drying and one moistening, it both avoids excessive drying that injures Yin and prevents cloying richness from obstructing the Stomach, thereby forming an ideal synergistic effect.

Tonify the Spleen, Lung, and Kidney (the three Zang organs).

Chinese yam (Dioscorea opposita) is neutral in nature and sweet in taste. It enters the Spleen (SP), Lung (LU), and Kidney (KI) meridians. Its multiple functions include tonifying the Spleen and nourishing the Stomach, generating fluids and benefiting the Lung, and tonifying the Kidney and astringing essence. In the *Shen Nong Ben Cao Jing* (Divine Farmer’s Classic of the Materia Medica), it is listed as a superior herb, described as being able to “tonify the Middle, boost qi strength, and increase flesh.” The mucilage and various amino acids rich in Chinese yam gently nourish the yin fluids of the Spleen and Stomach while consolidating Kidney essence. When combined with pig spine bone, which enters the Kidney meridian and has the effect of nourishing yin, filling marrow, and supplementing essence, the two together deepen the Kidney-tonifying action.

Harmonize the various medicinals and guide them into the meridians.

Pig spine bones in this medicinal food not only provide nutrition but also play an important role in “guiding the meridians” (yǐn jīng). According to Traditional Chinese Medicine, substances with blood and flesh that are sentient beings (xuè ròu yǒu qíng zhī pǐn) can penetrate deeply into the level of essence and blood (jīng xuè) of the human body, guiding the effects of other ingredients to better enter the corresponding meridians and zang-fu organs. Pig spine bones, being thick and heavy in texture, are able to guide medicinals into the kidney (shèn) and bone marrow (gǔ suǐ), allowing the nourishing and tonifying power of Chinese yam (Huái Shān Yào, Dioscorea opposita) to not only remain in the spleen (pí) and stomach (wèi) but also descend to the kidney, lower back, and knees (yāo xī), thereby enhancing the overall tonifying effect.

Suitable Candidates

This therapeutic diet is particularly suitable for individuals with the pattern of Spleen Deficiency with Dampness Accumulation. Typical manifestations in such individuals include: a white or thick greasy tongue coating, tooth-marked edges on the tongue, stools that are loose or sticky and difficult to pass, a sensation of heaviness and fatigue in the body, frequent postprandial abdominal distension, and a sallow, lusterless complexion. For these individuals, consuming the soup of hyacinth bean (Lablab purpureus) and Chinese yam (Dioscorea opposita) with pork spine 2–3 times weekly can gradually improve the transport and transformation functions of the Spleen and Stomach, thereby resolving Dampness and generating Qi and Blood.

In addition, this medicinal dietary soup is also suitable for the following groups of people: first, those experiencing physical heaviness and lethargy with poor appetite due to living in humid environments or during the plum rain season; second, individuals in post-illness recovery or post-surgery convalescence who are weak and require gentle nourishment but are concerned about greasy or cloying foods impairing the stomach; third, elderly people and children with Spleen and Stomach Deficiency patterns, characterized by poor digestion and a tendency to diarrhea; fourth, white-collar workers who have reduced Spleen and Stomach function due to prolonged desk work and lack of exercise. This soup has a neutral nature and can be used as a long-term daily dietary therapy, consumed in rotation.

Contraindicated populations

Although the Pork Rib Soup with Hyacinth Bean and Chinese Yam is mild in nature, it is still unsuitable or should be consumed with caution by certain individuals. First, those with an Excess Heat pattern should avoid it. Such individuals often present with halitosis, sore throat, dry stools, scanty dark yellow urine, a red tongue with yellow coating, etc. Since both Hyacinth Bean (白扁豆, *Lablab purpureus*) and Chinese Yam (淮山药, *Dioscorea opposita*) have astringent and securing properties, they may aggravate the stagnation of heat pathogen within the body, thereby worsening the symptoms.

Secondly, during acute episodes of externally-contracted wind-cold or wind-heat, consumption is not advisable. When the body is experiencing fever, cough with copious phlegm, or acute gastroenteritis, the priority should be to expel pathogenic factors. Tonifying medicinal diets should not be taken prematurely, as this may “close the door and trap the bandit” (i.e., trap pathogens inside), making it difficult to eliminate the external pathogens. Additionally, individuals with allergies to legumes or pork bones should avoid consumption. Patients with severe renal insufficiency requiring protein restriction should only consume under the guidance of a physician. Pregnant and lactating women with normal constitution may consume in moderation, but excessive intake is not recommended; in special circumstances, consultation with a Chinese medicine practitioner is advised.

Ingredient formula proportions

Pork spine 600g, white hyacinth bean (Semen Lablab Album) 50g, dried Chinese yam slices (Rhizoma Dioscoreae) 30g (or fresh Chinese yam 200g), honeyed jujubes (Fructus Jujubae) 2 pieces, aged tangerine peel (Pericarpium Citri Reticulatae) 1 segment (approx. 3g), fresh ginger (Rhizoma Zingiberis Recens) 5 slices, water approx. 2500ml, salt to taste (for seasoning before serving).

The above proportion serves 3–4 people; when preparing, adjust the amounts proportionally according to the actual number of diners. Note that it is recommended to soak white hyacinth bean (Dolichos lablab) in clean water for at least 2 hours in advance, as this makes it easier to cook thoroughly and facilitates the release of active constituents. Dried Chinese yam (Dioscorea opposita) slices are more resistant to prolonged cooking than fresh Chinese yam, and their tonifying effect is more concentrated. If using fresh Chinese yam, it is advised to add it 30 minutes before finishing cooking to prevent it from becoming overly soft and affecting the texture.

Preparation method

Step 1: Prepare the ingredients. Cut the pork spine bones into segments approximately 5 cm long, then soak them in cold water for about 30 minutes, changing the water once during this time to remove blood and impurities. Soak the white hyacinth bean (Semen Lablab Album) in clean water for 2 hours in advance, then rinse and drain. Briefly rinse the dried Chinese yam slices (Rhizoma Dioscoreae Oppositae); if using fresh Chinese yam, peel the skin and cut into rolling chunks, then immediately soak in lightly salted water to prevent oxidation and blackening.

Second step: blanching to remove the fishy odor. Place the soaked pork spine bones in a pot of cold water, add 2 slices of ginger and a splash of cooking wine. Bring to a boil over high heat, then continue boiling for about 3 minutes, skimming off the foam continuously. Remove the bones, rinse off any remaining foam on the surface with warm water, and drain well. This step effectively removes the fishy smell and excess fat from the pork bones, making the soup purer and more delicious.

Step three: Begin the cooking process. Take a clay pot or ceramic soup pot, and add the blanched pork spine bones, the soaked white hyacinth beans (Semen Lablab Album), dried Chinese yam slices (Rhizoma Dioscoreae, if using fresh Chinese yam, do not add yet), candied dates (Fructus Jujubae), tangerine peel (Pericarpium Citri Reticulatae), and the remaining 3 slices of fresh ginger (Rhizoma Zingiberis Recens). Add enough water (approximately 2500 ml) all at once, ensuring the liquid completely covers all ingredients and rises about 3-4 cm above them.

Step 4: Control the cooking temperature. First, bring the soup to a boil over high heat. Once boiling, immediately reduce to low heat, cover the pot (leaving a small gap to prevent overflow), and simmer gently for 1.5 hours. If using fresh Chinese yam (Huai Shan Yao), add the yam pieces after 1 hour of simmering, then continue cooking for another 30 minutes. The final volume of the soup will be reduced to approximately two-thirds of the original amount.

Step 5: Season and finish cooking. Add an appropriate amount of salt to taste 10 minutes before turning off the heat. Do not add salt too early, as it may affect the texture of the meat and the extraction of nutrients. Stir well, then serve. When eating, consume both the broth and the ingredients together. It is especially recommended to eat the White Hyacinth Bean (Semen Lablab Album) and Chinese Yam (Dioscoreae Rhizoma) to obtain more complete medicinal effects.

Drinking Tips

1. Frequency and Timing of Consumption: This medicinal diet should not be consumed daily. It is recommended to take it 2–3 times per week, for no more than 4 consecutive weeks. The optimal consumption time is in the morning or at noon, when the body’s yang qi is abundant and the digestive and absorptive functions are stronger, allowing for better absorption of the active ingredients in the soup. It is not advisable to consume a large amount before bedtime, as this may increase gastrointestinal burden and frequency of urination during the night.

2. Food Preparation Cautions: White hyacinth beans (Lablab purpureus) must be thoroughly cooked, as raw beans contain certain natural toxins (e.g., lectins) that can only be completely destroyed through sufficient heating. Therefore, after soaking, they should be boiled for at least one hour to ensure they are fully cooked. Additionally, the soup of hyacinth beans and Chinese yam (Dioscorea opposita) with pork spine should not be consumed together with strong tea, radish, or other qi-dispersing foods, as this may interfere with the tonic effects of Chinese yam.

3. Individualized Adjustment and Observation: During consumption, you should observe the body’s reactions. If symptoms of “heat” such as dry mouth, throat discomfort, or dry stools occur, it indicates that the medicinal diet is overly warm and drying or that your constitution is relatively hot. In this case, you may reduce the amount of White Hyacinth Bean (Semen Lablab Album) appropriately, or add 10 grams of Dwarf Lilyturf Tuber (Ophiopogon japonicus) to the soup to balance the warm and drying nature. If after drinking you feel abdominal comfort, improved appetite, and well-formed stools, it suggests that the medicinal diet suits your constitution, and you may continue consuming it as originally prescribed. It is recommended to consume the soup on the same day it is made; do not store it overnight, to ensure freshness and medicinal efficacy.