Adzuki Bean and Coix Seed Carp Soup: A Traditional Recipe to Support Healthy Fluid Balance

Adzuki Bean and Coix Seed Carp Soup – Traditional Dietary Support

Introduction to a Traditional Dietary Practice

Red Bean and Coix Seed Carp Soup is a time-honored traditional Chinese dietary recipe, widely popular among the people, especially prevalent in the Jiangnan water town regions. This soup features carp as the main ingredient, combined with two edible ingredients: red beans (Adzuki bean) and coix seeds (Coix seed). It is slow-simmered over gentle heat, resulting in a milky white broth with a rich, mellow flavor that balances savory taste and herbal aroma.

This dietary recipe was first recorded in the *Shi Liao Ben Cao* (Materia Medica for Dietotherapy) during the Tang Dynasty, and has been highly regarded by physicians throughout the ages. In the Yuan Dynasty, the *Yin Shan Zheng Yao* (Principles of Correct Diet) includes a detailed description of a similar formula, stating that it can “help promote normal fluid balance and support healthy digestion.” The Adzuki Bean and Coix Seed and Common Carp Soup is not only a common household soup but also a typical example of a food that combines nutritional value with herbal support. It is suitable as a nourishing diet for supporting the body during seasonal changes.

Traditional Uses

The core traditional uses of Adzuki Bean and Coix Seed Carp Soup are to support healthy digestion and fluid balance, as well as to help maintain a comfortable internal environment. Carp itself is traditionally used to help maintain normal fluid levels and support overall comfort. Adzuki bean (Vigna angularis) is traditionally used to help maintain fluid balance and support healthy blood flow. Coix seed (Semen Coicis) is traditionally used to support digestive health and joint comfort. When used together, this combination may help support the body’s natural fluid metabolism and maintain a sense of well-being.

Modern nutritional studies have found that carp is rich in high-quality protein and various amino acids, while red bean and coix seed are abundant in dietary fiber, B vitamins, and minerals. Together, they help support normal osmotic balance and promote healthy sodium levels, thereby helping to maintain healthy blood pressure and lipid levels already within normal range. Additionally, this soup can help support immune function, promote energy levels, and provide nutritional support for those seeking to maintain healthy fluid balance.

Main support mechanisms

This recipe supports healthy digestive function, helping the body maintain its natural ability to manage fluid balance, thereby promoting overall internal harmony. Meanwhile, the traditional diuretic-supportive properties of carp and adzuki beans may help support normal urine output, assisting the body’s natural elimination processes, thus forming a dual pathway for maintaining healthy fluid dynamics.

Traditional Chinese Medicine Perspective

From the perspective of TCM pattern differentiation, the Red Bean and Coix Seed Carp Decoction is traditionally believed to support the Spleen (SP), Kidney (KI), and Bladder (BL) meridians. In TCM theory, the Spleen governs the transportation and transformation of fluids; when the digestive system is balanced, the body naturally maintains healthy fluid levels. In this formula, Coix Seed is traditionally used to support digestive comfort and fluid balance by helping to percolate dampness and fortify the Spleen. Adzuki Bean is traditionally used to support heart and small intestine health, excelling in promoting normal urinary function and helping the body maintain comfort.

According to the *Bencao Gangmu* (Compendium of Materia Medica), common carp “when boiled and eaten, helps support normal water circulation and promotes urination.” Its nature is neutral, and it is traditionally used to support digestive health and overall vitality. Combined with two other ingredients, the formula achieves a balance: nourishing without stagnation, and supporting without overwhelming the body’s natural state. It is especially suitable for those seeking to maintain digestive comfort and fluid balance. For individuals experiencing occasional feelings of heaviness or bloating, this soup can help promote a sense of internal harmony and support normal digestive rhythms.

Suitable Population

Red Bean and Coix Seed Carp Soup is most suitable for individuals who occasionally experience a heavy sensation in the body, temporary fluid retention in the limbs (especially pronounced in the lower limbs), occasional lack of appetite, or mild digestive sluggishness. Additionally, those who live in damp environments, engage in prolonged water-related work, or prefer raw, cold, and greasy foods may find this soup helpful as a daily dietary support for maintaining comfort.

This soup also provides good nutritional support for individuals seeking to maintain healthy fluid balance, as well as for those looking to support healthy lipid metabolism and weight management. For postpartum women, consuming this soup may help support lactation and aid postpartum recovery. Middle-aged and elderly men may also consume it in moderation to support urinary comfort.

Considerations for Certain Populations

Although the red bean and coix seed carp soup has a mild nature, it is not suitable for everyone. The following individuals should use it with caution or avoid it entirely: First, those with dry mouth and throat, or signs of depleted fluids—because the fluid-balancing effect of coix seed and red bean may not be appropriate for individuals who need to retain moisture. Second, pregnant women and women planning pregnancy. Coix seed has traditionally been noted to have a stimulating effect on uterine smooth muscle; therefore, it is not recommended for pregnant women.

Third, individuals with specific dietary restrictions should consult a healthcare professional before consuming. Fourth, individuals allergic to Carp (Cyprinus carpio) or those with known food sensitivities should avoid consumption. Fifth, those with occasional digestive discomfort may reduce the dosage of Coix Seed and combine it with warming ingredients such as Fresh Ginger and Black Pepper to balance the cool nature, or consume it under the guidance of a healthcare professional.

Ingredient Ratios

Here is the precise recipe for one serving (approximately 500 ml of soup): 1 live common carp (about 400 g, preferably under 500 g), 40 g red bean (adzuki bean, *Vigna angularis*), 30 g coix seed (Job’s tears, *Coix lacryma-jobi*). Supporting ingredients: 15 g fresh ginger (about 5–6 slices), 2 sections of scallion white (each about 5 cm), 10 ml yellow rice wine (Shaoxing wine), 2 g salt (for final seasoning), 1 g white pepper powder (optional), 1500 ml drinking water (about one-third will evaporate during simmering).

For a family of three, increase proportionally: 1 common carp (about 600–800 g), 120 g adzuki bean, 90 g coix seed, 30 g fresh ginger, 3 segments scallion, 20 ml yellow wine, 4 g salt, and 2500–3000 ml drinking water. Note that both the adzuki bean and coix seed should be soaked in cold water for at least 4 hours in advance—preferably overnight—to allow full water absorption, thereby reducing cooking time and promoting the extraction of nutrients.

Preparation Method

Step 1: Prepare the ingredients. Soak red beans and coix seeds in advance for 4–6 hours; if the weather is hot, place them in the refrigerator to soak to prevent spoilage. Scale the carp, remove the gills and internal organs, and especially scrape off the black membrane inside the belly (the main source of fishy odor). Rinse thoroughly and drain. Make three diagonal cuts (about 0.5 cm deep) on each side of the fish to facilitate flavor absorption.

Step 2: Pan-fry the fish to set the shape. Heat a wok over medium heat, then add a small amount of cooking oil (approximately 5 mL). Swirl the wok to evenly coat the bottom with oil, then place the carp in the wok. Pan-fry over medium heat until both sides turn light golden brown and the fish is set. Avoid turning it frequently; cook each side for about 2 minutes. This step helps improve the flavor and prevents the fish flesh from breaking apart during simmering. Once fried, add Shaoxing rice wine, swirl the wok to allow the alcohol to evaporate, then add ginger slices and scallion sections, and stir-fry until fragrant.

Step 3: Simmering. Transfer the pan-fried carp along with ginger and scallions into a clay pot or stew pot. Add the soaked adzuki beans and coix seeds, including the soaking water to retain dissolved nutrients. Then add enough drinking water to completely submerge the ingredients. Bring to a boil over high heat, skim off any foam, then reduce to low heat and gently simmer for 1.5–2 hours until the broth becomes thick and white, the beans are tender, and the fish flesh can be easily separated from the bones with a light poke of chopsticks. Five minutes before turning off the heat, season with salt and white pepper, stir well, and serve.

Tips for Consumption

The best time to enjoy is between 9–11 AM or 3–5 PM, when the body’s natural rhythms are strong and digestive function is at its peak, allowing for more complete absorption of nutrients. Consume one small bowl (approximately 200 ml) per serving, 2–3 times per week, for no more than 4 consecutive weeks as part of a balanced diet.

2. This soup should be consumed warm, not iced or cold. Because both Coix seed and Adzuki bean are traditionally considered cool in nature, consuming them cold may not be ideal for everyone. If there is leftover soup, it should be stored refrigerated and reheated for consumption within 24 hours. When reheating, use a clay pot or steamer, and avoid using a microwave oven to preserve the flavor.

3. During the consumption period, reduce intake of raw and cold foods, sweet and greasy pastries, oily fried foods, and beer, as these foods may counteract the benefits of the recipe. To enhance the effect, you may also drink water infused with 5g of dried tangerine peel or consume foods that support fluid balance, such as white radish and winter melon. If you experience any discomfort, discontinue use and consult a healthcare professional.

4. This product is not recommended during acute febrile illness or when experiencing sore throat with swelling and pain, as fish may not be suitable for everyone. If allergic symptoms such as rash or itching occur after ingestion, discontinue use immediately and seek medical attention.