Winter Melon and Coix Seed Soup: Recipe, Benefits, and TCM Guide

Introduction to Medicinal Diet

Winter Melon and Coix Seed Spine Bone Soup is a traditional medicinal dish originating from the Lingnan region, known for clearing heat and draining dampness. It is widely popular in damp-heat areas such as Guangdong, Guangxi, and Hainan. This soup features winter melon (Benincasa hispida), coix seed (Coix lacryma-jobi, also known as Job’s tears), and pork spine bone as the main ingredients, supplemented with small amounts of fresh ginger (Zingiber officinale) and tangerine peel (Citri Reticulatae Pericarpium). Slow-cooked over gentle heat, the resulting soup has a clear broth, fragrant aroma, and a smooth, refreshing taste. It can be enjoyed as a daily accompaniment to meals or used as a therapeutic medicinal dish during the hot and damp season or for individuals with excessive damp-heat in the body.

The formulation of this Winter Melon and Coix Seed Pork Spine Bone Soup is based on the TCM principle of “medicinal and food homology.” Winter melon (Benincasa hispida) is cool in nature with sweet and bland flavors; Coix seed (Coix lacryma-jobi var. ma-yuen) is slightly cold in nature with sweet and bland flavors. Both enter the Spleen (SP), Stomach (ST), Lung (LU), and Large Intestine (LI) meridians, functioning to promote urination and drain dampness, clear heat and relieve impediment (bi). Pork spine bones are rich in collagen and calcium, which can tonify the kidney and fill the marrow, strengthen sinews and bones, while also imparting a richer, more savory flavor to the soup. This soup is simple to prepare, with easily accessible ingredients, making it a classic in the home health soup repertoire. It is especially suitable for addressing the accumulation of internal damp-heat commonly seen in modern individuals due to irregular diet and disrupted daily routines.

Efficacy of Medicinal Diet

The core effects of Winter Melon and Coix Seed Pork Spine Bone Soup are to clear heat and drain dampness, fortify the spleen, and benefit the kidney. Winter melon (Benincasa hispida) has a strong diuretic and swelling-reducing action, helping to expel excess fluid and metabolic waste from the body, thereby alleviating edema. Coix seed (Semen Coicis, Coix lacryma-jobi var. ma-yuen) excels at dispelling damp-heat from the spleen and stomach, significantly improving symptoms such as poor appetite due to dampness obstruction, sticky stools, and heavy limbs. Pork spine bone (vertebrae lumbales suillae) tonifies the kidney and strengthens the lower back, replenishing the righteous qi (zhengqi) consumed by damp-heat, thus dispelling the pathogenic factor without damaging the body’s healthy qi.

From a nutritional perspective, this soup is rich in various vitamins, minerals, and high-quality protein. Winter melon (Benincasa hispida) is abundant in vitamin C and potassium salts, which help regulate blood pressure and maintain cardiac function. Coix seed (Coix lacryma-jobi var. ma-yuen / Job’s tears) contains coixenolide, protein, and dietary fiber, exerting antioxidant, hypoglycemic, and immunomodulatory effects. Long-term moderate consumption can help improve metabolic disorders and serve as an adjunctive treatment for Damp-Heat-related conditions such as hyperuricemia, mild obesity, and chronic eczema.

The heat-clearing and diuretic action of wax gourd (Benincasa hispida)

In the *Bencao Gangmu* (Compendium of Materia Medica), winter melon (Benincasa hispida) is recorded to “treat abdominal distension due to water retention, promote urination, and relieve thirst.” Its property of clearing heat and promoting diuresis is especially suitable in summer. The peel and flesh of winter melon have more pronounced diuretic effects; therefore, when preparing medicinal food, it is usually recommended to retain the peel to enhance the dampness-eliminating efficacy.

The spleen-strengthening and dampness-draining effect of Coix Seed (Semen Coicis)

Coix seed (Semen Coicis) is an essential herb in Chinese medicine for eliminating dampness. When used raw, it tends to clear heat and promote diuresis; when stir-fried, it focuses on strengthening the spleen and stopping diarrhea. In winter melon (Benincasa hispida) and Coix seed spine bone soup, the combination of Coix seed and winter melon works synergistically—one clearing, one percolating—effectively resolving the sticky damp-heat pathogen in the body and restoring the spleen and stomach’s transport and transformation functions.

The Role of Traditional Chinese Medicine

In TCM theory, Winter Melon, Coix Seed, and Pork Spine Bone Soup mainly acts on the Spleen, Stomach, and Kidney Zang-organs. The Spleen governs transportation and transformation of fluids, the Stomach governs reception and ripening, and the Kidney governs water metabolism. When improper diet or external contraction of Damp-Heat leads to the Spleen failing to transport and transform, the Stomach failing to harmonize and descend, and the Kidney failing in qi transformation, symptoms such as edema, difficult urination, loose stools, and heavy sensation in the limbs arise. This soup restores fluid metabolism balance through Winter Melon’s action of promoting urination and draining dampness, Coix Seed’s effect of strengthening the Spleen and removing impediment (Bi), and Pork Spine Bone’s function of supplementing the Kidney and boosting essence.

From the perspective of nature, flavor, and meridian tropism, Donggua (Benincasa hispida, winter melon) is sweet, bland, and slightly cold, entering the Lung (LU), Large Intestine (LI), and Urinary Bladder (BL) meridians. It excels at clearing Lung heat and promoting urination. Yiyiren (Coix lacryma-jobi var. ma-yuen, coix seed) is sweet, bland, and slightly cold, entering the Spleen (SP), Stomach (ST), and Lung (LU) meridians. It strengthens the Spleen, drains dampness, relieves bi (painful obstruction) syndrome, and checks diarrhea. Zhuzhugu (Sus scrofa domestica, pig spine bone) is sweet, salty, and neutral, entering the Kidney (KI) and Spleen (SP) meridians. It supplements the Kidney and benefits essence, strengthens sinews and bones. When these three ingredients are combined, they are cold but not harsh, supplementing without causing stagnation, and simultaneously dispelling pathogens and supporting the upright. This combination is especially suitable for the mixed deficiency-excess pattern of internal damp-heat accumulation accompanied by Spleen and Kidney insufficiency. The addition of Shengjiang (Zingiber officinale, fresh ginger) not only removes fishy odors and enhances flavor, but also warms the Stomach and disperses cold, thereby restraining the cold nature of Donggua and Yiyiren, making the overall medicinal food more balanced and gentle in property.

Indications

Winter Melon and Job’s Tears Pork Spine Soup is particularly suitable for the following populations: first, individuals with Damp-Heat constitution, presenting with oily facial complexion, tendency to acne, bitter taste and dry mouth, sticky and uncomfortable stools, and dark yellow urine; second, patients with edema or puffiness, including idiopathic edema, mild renal edema, and women experiencing edema before or after menstruation; third, those with hyperuricemia and gout, as both winter melon (Benincasa hispida) and Job’s tears (Coix lacryma-jobi) promote uric acid excretion, helping to control serum uric acid levels; fourth, individuals suffering from summer-dampness encumbering the spleen, characterized by poor appetite and mental fatigue; this soup can clear heat, resolve summerheat, fortify the spleen, and stimulate appetite.

Furthermore, urban white-collar workers who sit for long periods and lack exercise, as well as individuals who overindulge in rich, greasy, and sweet foods, or consume excessive tobacco and alcohol, are prone to internal accumulation of damp-heat. Moderate consumption of Winter Melon and Coix Seed Soup with Pork Backbone (Donggua Yiren Jigu Tang) can help improve the body’s metabolic environment and reduce the metabolic burden on the liver and kidneys. For the elderly and children, as long as the functions of the spleen and stomach are normal, this soup can also be consumed in moderation during hot, damp summer weather, though attention should be paid to controlling the amount and frequency of intake.

Contraindicated Groups

Winter Melon and Coix Seed Pork Spine Soup (Benincasa hispida and Coix lacryma‑jobi var. ma‑yuen with pork spine) is a mild medicinal food, but it is not suitable for everyone. Individuals with Spleen‑Stomach deficiency‑cold pattern should use it with caution or avoid it altogether. This population typically presents with epigastric cold pain that is relieved by warmth and pressure, loose stools, aversion to cold, and cold extremities. Consuming this soup may aggravate the deficiency‑cold pattern of the Spleen and Stomach. Coix seed has a slippery and draining nature, so it is contraindicated in pregnancy, especially during the first trimester, as it may stimulate uterine smooth muscle contractions and increase the risk of miscarriage. Winter melon has a strong diuretic effect; therefore, patients with frequent urination or nocturia should reduce their intake to prevent worsening of symptoms.

Moreover, individuals with weak constitution or qi and blood deficiency should also avoid prolonged or excessive consumption, as the diuretic action of wax gourd (Benincasa hispida) and coix seed (Coix lacryma-jobi) can deplete certain water-soluble vitamins and minerals, and excessive diuresis may harm the body fluids. During the use of qi-supplementing herbs such as ginseng (Panax ginseng) and astragalus (Astragalus membranaceus), it is recommended to reduce or suspend intake of this soup, as coix seed is considered incompatible with these herbs. Those allergic to wax gourd, coix seed, or pork bones should avoid consumption. Patients in postoperative recovery or those taking specific medications (e.g., diuretics, hypoglycemic agents) are advised to consume cautiously under the guidance of a physician or pharmacist.

Ingredient formula proportions

The ingredient proportions for a standard four-serving Winter Melon and Coix Seed Pork Spine Bone Soup are as follows: 500g winter melon with skin, preferably mature with dark green skin and thick flesh; 60g raw Coix seed (Semen Coicis), best when plump, white, and clean; 400g pork spine bones, choose fresh ones with a little meat attached and no off-odor; 15g fresh ginger (about 5 slices), to remove fishy smell and warm the stomach; 3g tangerine peel (about 1 small piece), to enhance qi-regulating and dampness-resolving effects; salt to taste (about 3g), for final seasoning. For a richer flavor, you may add 2 honey dates or 3 figs to increase the mild sweetness.

The above ingredient ratios can be adjusted according to individual constitution and season. For those with more severe Damp-Heat pattern, increase Coix seed (Semen Coicis, Coix lacryma-jobi) to 80g and winter melon (Benincasa hispida) to 600g. For individuals with Spleen-Stomach weakness, replace raw Coix seed with stir-fried Coix seed and reduce winter melon to 400g. For those with prominent Kidney Deficiency, add Eucommia bark (Cortex Eucommiae, Eucommia ulmoides) 10g or goji berry (Fructus Lycii, Lycium barbarum) 15g while simmering. Pork spine can also be substituted with lean pork or pork ribs, but pork spine is more effective for tonifying the Kidney and strengthening the sinews. Coix seed should be soaked in water for at least 2 hours in advance to shorten cooking time and facilitate the extraction of active constituents.

Cooking Method

Step 1: Preparation. Cut the pork spine into 4-5 cm sections, and soak in clean water for 30 minutes to remove blood. Rinse Coix Seeds (薏苡仁 *Coix lacryma-jobi*, Job’s Tears) thoroughly, then soak in water for 2 hours. Wash winter melon (冬瓜 *Benincasa hispida*) with the skin on, remove the pulp and seeds, and cut into 3 cm thick chunks. Wash and slice fresh ginger (生姜 *Zingiber officinale*). Soak dried tangerine peel (陈皮 *Citri Reticulatae Pericarpium*) in warm water until soft, then scrape off the inner pith.

Step 2: Blanching. Place the soaked pork spine bones in a pot of cold water, add 2 slices of Zingiber officinale (Ginger) and a small amount of cooking wine. Bring to a vigorous boil over high heat and continue boiling for 3–5 minutes. Remove the bones and rinse off any foam with warm water. This step effectively removes the gamey odor and blood impurities from the pork bones, ensuring the soup remains clear and not cloudy.

Step 3: Simmering the soup. Place the blanched pork spine, soaked Coix seed (Semen Coicis), wax gourd (Benincasa hispida) chunks, fresh ginger (Rhizoma Zingiberis Recens) slices, and tangerine peel (Pericarpium Citri Reticulatae) together in a clay pot or soup pot. Add enough water (approximately 2500 ml) so that the water level is about 5 cm above the ingredients. Bring to a boil over high heat, skim off any foam, then reduce to low heat and simmer gently for 1.5–2 hours, until the soup turns milky white, the meat falls off the bone, and the Coix seeds have bloomed.

Step 4: Seasoning and finishing. Add an appropriate amount of salt to taste 10 minutes before turning off the heat. Note that salt should not be added too early, as it may affect the freshness of the broth and the extraction of nutrients. After cooking, remove the tangerine peel (Citri Reticulatae Pericarpium) and ginger slices, ladle the soup into bowls, and sprinkle with a little chopped scallion or cilantro for aroma before serving. For a richer flavor, wrap the winter melon peel (Benincasae Exocarpium) in a cheesecloth before cooking, then remove and discard after the soup is finished.

Drinking Tips

First, Winter Melon, Coix Seed and Spine Bone Soup should be consumed warm. In summer, it can be allowed to cool to a warm temperature before drinking, but should not be consumed chilled, as coldness may harm the Stomach. It is suitable to take 2–3 times per week, and continuous consumption should not exceed two weeks. If long-term regulation is needed, take a one-week break before resuming. The recommended dosage per serving is 200–300 ml, and excessive intake should be avoided.

Second, the best time to consume this decoction is between 9–11 AM (Spleen Meridian time) and 3–5 PM (Bladder Meridian time). During these two periods, the body’s water metabolism is most active, and drinking the decoction can better exert its effect of promoting diuresis and dispelling dampness. It is not recommended to consume large amounts after 8 PM, as this may lead to nocturia and affect sleep quality.

Third, during the consumption of Winter Melon and Coix Seed Pork Spine Bone Soup, attention should be paid to dietary pairings. Avoid simultaneously eating raw, cold, and cooling foods, greasy and heavy-flavored dishes, as well as pungent and spicy items, so as not to impair the Spleen and Stomach’s transportation and transformation function. It is appropriate to incorporate some ingredients that fortify the Spleen and boost Qi, such as Chinese Yam (Dioscorea opposita), White Hyacinth Bean (Lablab purpureus), and Poria (Wolfiporia extensa), to enhance the effect of resolving Dampness. Pregnant women, menstruating women, and those with Spleen-Stomach Deficiency Cold should only consume this soup under the guidance of a qualified professional, adjusting the ingredient proportions – for example, substituting raw Coix Seed (Semen Coicis) with stir-fried Coix Seed (Semen Coicis preparatum) and adding warming ingredients such as Red Dates (Fructus Jujubae) to mitigate the cold nature.