Kudzu Mung Bean Arrowhead Soup Recipe & Medicinal Benefits

Pueraria Powder, Mung Bean, and Arrowhead Soup – Traditional Wellness Soup

Introduction to the Recipe

Kudzu Starch, Mung Bean, and Arrowhead Soup is a classic cooling wellness recipe originating from Lingnan folk tradition, passed down for centuries. It is slowly simmered from three core ingredients: kudzu starch (Pueraria lobata root starch), mung bean (Vigna radiata), and arrowhead (Sagittaria sagittifolia). Kudzu starch is obtained from wild kudzu root, processed through water-grinding and sedimentation to yield a fine white powder. As early as the *Shennong Bencao Jing* (Divine Farmer’s Materia Medica), it was listed as a medium-grade herb, traditionally used to support the body’s cooling and hydration. Mung bean has been a medicinal and food dual-purpose ingredient for supporting summer comfort since ancient times. Li Shizhen in the *Bencao Gangmu* (Compendium of Materia Medica) praised mung bean for supporting the body’s natural cleansing processes. Arrowhead, also known as “white water chestnut,” grows in ponds and paddy fields. Its taste is sweet and slightly bitter, nature cool, with unique effects of supporting respiratory comfort, maintaining fluid balance, and promoting urinary tract health. The three ingredients complement each other: the clear transparency of kudzu starch, the sweet moistness of mung bean, and the slight bitterness of arrowhead are skillfully blended, resulting in a soup with a jade-green color, smooth texture, and cooling yet not cold quality—an ideal summer wellness soup.

Although the name of this traditional soup is simple, it serves as a bridge between folk culinary wisdom and Traditional Chinese Medicine wellness theory. Its ingredients are all common items, and the cooking method is not complicated, yet it can help support the body’s response to common seasonal conditions such as occasional feelings of warmth, thirst, and temporary digestive imbalance. In Guangdong, Fujian and other regions, many families will brew a pot of Kudzu Root Powder, Mung Bean, and Arrowhead Soup (Gěfěn Lǜdòu Cígu Tāng) every few days after the onset of warm weather, drinking it as a tea substitute to not only quench thirst but also promote a sense of coolness. This is a vivid embodiment of the principle of “homology of medicine and food” (yào shí tóng yuán). In recent years, with the resurgence of traditional wellness culture, this soup has re-entered the urban public’s view, becoming a favored choice for those pursuing a natural and healthy lifestyle.

Wellness Benefits

Kudzu Root Powder, Mung Bean, and Arrowhead Decoction is most notable for supporting cooling and comfort during warm weather, as well as promoting the body’s natural elimination processes. Warm weather is dominant in summer; its nature is hot, ascending, and dispersing, and it most easily affects body fluid balance, leading to occasional dry mouth and throat, temporary irritation, dizziness, fatigue, and other discomforts. In this decoction, kudzu root powder excels at helping maintain hydration and promoting a sense of coolness—able to support the body’s natural cooling mechanisms. Mung bean is traditionally used for supporting the body’s natural cleansing and cooling, and promoting fluid balance—it can help guide the body’s natural cooling processes through urine. Arrowhead focuses on supporting respiratory health, lung comfort, and urinary tract function, and is particularly skilled at supporting the body’s response to occasional dampness and warmth. The three ingredients work together like a well-coordinated “cooling trio,” synergistically supporting from three dimensions—cooling the exterior, clearing the interior, and promoting fluid balance—so that seasonal imbalances have no place to settle.

In addition to its primary function of supporting cooling and comfort, this soup also serves as a supportive dietary addition for skin comfort. During warm, humid weather, the body’s pores open wide. If the body’s internal balance is affected, occasional skin irritations such as heat rash, furuncles, and minor skin discomfort can easily develop. Both mung bean (Vigna radiata) and arrowhead (Sagittaria sagittifolia) have traditionally been used to support skin health and maintain a healthy appearance. Regular consumption of this soup helps the body support its natural cooling and cleansing processes, thereby promoting a sense of skin comfort and helping soothe occasional skin issues. Furthermore, the isoflavones abundant in kudzu root starch (Pueraria lobata) help support healthy blood lipid levels and microcirculation. The polysaccharides in mung bean help support intestinal cholesterol balance, giving this soup not only a cooling, comfort-promoting function but also additional nourishing and wellness-supporting value.

Role of the Herbal Ingredients

Kudzu root powder (Gegen Fen): Supports yang energy and cooling, helps maintain hydration.

Puerariae Lobatae Radix (Kudzu root) is sweet and acrid in flavor, neutral in nature, and enters the Spleen and Stomach meridians. In the *Treatise on Cold Damage*, Zhang Zhongjing already used it to support muscle comfort. As a concentrated extract of kudzu root, Puerariae Lobatae Radix powder preserves the herb’s properties of supporting the body’s natural energy and cooling, as well as promoting comfort. When seasonal warmth affects the body, leading to occasional feelings of warmth and thirst, kudzu root powder can gently support the body’s natural cooling mechanisms, allowing the body to find balance. At the same time, its sweet and moistening nature helps maintain hydration, supporting comfort in the mouth and throat. Modern research indicates that puerarin, a constituent in kudzu root, helps support healthy circulation and microcirculation, which provides a scientific annotation for its traditional uses.

Vigna radiata (Mung Bean): Supports cooling and natural cleansing, promotes fluid balance.

Mung bean (Phaseolus radiatus) is sweet in flavor and cold in nature, entering the Heart and Stomach meridians. It is a representative food ingredient in Chinese medicine for supporting comfort during warm weather and the body’s natural defenses. The *Bencao Huiyan* (Collection of Herbal Commentaries) states that it “supports cooling, helps maintain hydration, and supports skin comfort.” The primary action of mung bean lies between the qi aspect and the blood aspect: it can both support cooling from the qi aspect and support the body’s natural cleansing from the blood aspect. The green skin of mung bean enters the Liver meridian (LR), and its effect of supporting liver health and vision, as well as promoting fluid balance, is particularly pronounced. The yellow kernel of mung bean enters the Spleen meridian (SP), and concurrently supports digestive wellness and harmonizes the Middle, supporting Stomach qi. When combined with kudzu root powder (*Pueraria lobata*, Pueraria powder), one supports cooling and the other supports cleansing, producing a focused effect.

Sagittaria sagittifolia (Arrowhead): Supports respiratory comfort and urinary tract health.

Arrowhead (Sagittaria sagittifolia) is sweet and slightly bitter in taste, cool in nature, and enters the Lung and Bladder meridians (LU, BL). Growing in water-damp environments, arrowhead is born of water qi and therefore excels at promoting fluid balance and supporting the body’s natural cooling. Its distinctive action lies in supporting lung and bladder function—the Lung is the upper source of water, and the Bladder is the official of the reservoir. Arrowhead can both support respiratory comfort and promote urinary tract health. It helps maintain comfortable urination during warm weather. The slightly bitter taste of arrowhead also supports yin nourishment, helping maintain balanced fluid levels. When used together with mung bean (Vigna radiata), the former supports respiratory comfort in the upper body, while the latter supports cooling and cleansing in the lower body, forming a pattern of supporting both upper and lower simultaneously.

Target Audience

Kudzu Starch, Mung Bean, and Arrowhead Decoction is most suitable for consumption during the peak of warm weather, especially for the following groups: First, individuals who work or engage in activities in outdoor environments for prolonged periods, such as construction workers, traffic police, delivery riders, and athletes. These people are most affected by seasonal warmth, often presenting with profuse sweating, dry mouth, heavy-headedness, and occasional lack of appetite—manifestations of temporary fatigue and fluid loss. This decoction can help replenish fluids, support cooling, and promote energy. Second, adolescents going through puberty. At this age, their yang qi is exuberant, and they may favor certain foods that can lead to occasional skin concerns. Regular consumption of this decoction can help support the body’s natural cleansing, promoting skin clarity.

Furthermore, middle-aged men who habitually consume pungent, greasy foods, tobacco, and alcohol, as well as office workers who frequently stay up late, experience high stress, and are prone to occasional feelings of warmth, also belong to the suitable population. These individuals may experience signs of occasional dampness and warmth, such as bitter taste, halitosis, yellow greasy tongue coating, sticky stools, and dark yellow urine. The Pueraria-Mung Bean-Arrowhead Decoction (Gegen Lǜdòu Cígu Tāng) can help promote overall comfort and balance through its actions of supporting cooling and fluid balance, as well as digestive function. For those with healthy lipid and glucose levels who are interested in dietary support, moderate consumption under professional guidance may serve as a supportive dietary addition.

Individuals Who Should Use Caution

Although the kudzu starch, mung bean, and arrowhead soup (葛粉绿豆慈姑汤) is an excellent summer cooling delicacy, it is not suitable for everyone. Individuals with a tendency to feel cold or with digestive sensitivity should consume it with caution. Such individuals typically present with habitual cold aversion, cold extremities, loose stools, poor appetite, or occasional digestive discomfort after consuming cool foods. In this soup, both mung bean (Vigna radiata) and arrowhead (Sagittaria sagittifolia) are cool in nature; kudzu root starch (Pueraria lobata) can support energy but leans more toward “moving” rather than “building.” If digestive energy is already weak, drinking this cool soup may not be suitable, potentially leading to occasional digestive discomfort or imbalance. For those with such constitution who still wish to use traditional recipes to support cooling, the mung bean amount can be halved, and three slices of fresh ginger (Zingiber officinale) and five red dates (Ziziphus jujuba) can be added during cooking to balance the cooling nature.

Women should also exercise caution when consuming such beverages during menstruation and pregnancy. During menstruation, qi and blood descend to the Uterus (Bao Gong), and the body is in a state of “draining but not storing.” Excessive use of cool and draining substances may affect menstrual comfort, potentially causing occasional menstrual discomfort. In pregnant women, as qi and blood are concentrated on supporting the baby, the digestive functions are relatively more sensitive. Blindly consuming cool-natured recipes may affect digestive warmth, which is not recommended for the baby’s development. Additionally, individuals who are taking warming herbal supplements (such as Ren Shen – Panax ginseng, Huang Qi – Astragalus membranaceus, Lu Rong – Cervus elaphus velvet antler) or certain medications (such as thyroid hormone, glucocorticoids) are advised to consult a healthcare professional to determine whether they can consume such beverages, as their cool nature may affect the intended support of the supplements.

Ingredient Formula Proportions

The classic formula and proportions for Pueraria Starch, Mung Bean, and Arrowhead Decoction (Gegen Lüdou Cigu Tang) are as follows (based on the daily dosage for a family of three):

Kudzu Root Powder: 50 g (preferably pure, additive-free wild kudzu root powder, bright white in color and fine in texture); Mung Beans: 100 g (choose plump, bright green beans free from insect damage); Arrowhead (Sagittaria sagittifolia): 150 g (fresh arrowhead, uniform in size, smooth skin, and no signs of decay); Rock Sugar: 30 g (adjustable between 20–40 g according to personal taste; yellow rock sugar may also be used); Water: 2000 ml (approximately 8 cups; water will evaporate during cooking, yielding about 1500 ml of soup).

It should be noted that the above proportions can be flexibly adjusted according to season and constitution: during intense warm weather with significant dry mouth, increase kudzu starch (Puerariae thomsonii starch) to 60-70 g and mung bean (Vigna radiata) to 120 g; if the digestive system tends to be sensitive with loose stools, reduce mung bean to 80 g and arrowhead (Sagittaria sagittifolia) to 120 g, and add 5 g of tangerine peel (Citri reticulatae pericarpium) to support digestive comfort; for those who prefer to limit sugar intake, omit rock sugar and instead add 30 g of fresh reed rhizome (Phragmitis rhizoma recens) or 30 g of fresh cogongrass rhizome (Imperatae rhizoma recens) to cook together, using natural sweetness as a sugar substitute. All ingredients should be sourced from reputable pharmacies or well-established supermarkets to ensure quality and safety.

Preparation Method

Step 1: Prepare the ingredients. Rinse the mung beans (Vigna radiata) twice with clean water to remove impurities and dust. Then soak them in plenty of clean water for 3–4 hours until the beans are visibly swollen and the skins are slightly cracked. Wash the arrowhead (Sagittaria sagittifolia) under running water. Gently scrape off the skin with a small knife and cut into slices about 0.5 cm thick. Soak in light salt water for 10 minutes to prevent oxidation and darkening. Place the kudzu root powder (Pueraria lobata) in a small bowl. Add 100 ml of cool boiled water and stir with chopsticks until completely dissolved, with no lumps or clumps. Set aside.

Step Two: Boiling mung beans. Use a clay pot or stainless steel soup pot (avoid iron pots, as they may affect the color and taste). Pour the soaked mung beans along with the soaking water into the pot, and add 1500 ml of fresh water. Cover the pot, bring to a boil over high heat, then immediately reduce to low heat, maintaining a gentle simmer for 30 minutes. Every 10 minutes, gently stir with a spoon to prevent the mung beans from sticking to the bottom. When the mung beans have burst open (flowered), the skins float to the surface, and the soup turns clear green, skim off the bean skins with a slotted spoon to make the soup clearer and brighter.

Step 3: Add arrowhead (Sagittaria sagittifolia) and kudzu starch (Pueraria lobata). Remove the sliced arrowhead from the salted water, rinse briefly under fresh water, and add to the mung bean (Vigna radiata) soup. Continue simmering on low heat for 15 minutes until the arrowhead slices soften and their flavor infuses into the soup. Then, stir the prepared kudzu starch suspension again thoroughly, and pour it into the pot in a thin, steady stream while stirring rapidly in one direction with a spoon to ensure the starch fully integrates with the liquid, forming a uniform paste. Continue to cook on low heat for 3–5 minutes, until the soup becomes translucent and glossy with fine bubbles rising to the surface. Add rock sugar, stir until completely dissolved, then turn off the heat.

Step 4: Rest and Serve. After turning off the heat, do not remove the lid immediately; let the soup sit covered for 5 minutes to allow the flavors to further meld. Then, uncover and, when the temperature drops to around 60–70°C (140–158°F), ladle the soup into bowls and serve. At this point, the Pueraria (Kudzu) Starch, Mung Bean, and Arrowhead Soup appears as a translucent pale green color, with an interweaving of bean and kudzu aromas. It is smooth and refreshing on the palate, slightly sweet, with a faint bitter aftertaste from the arrowhead (Sagittaria tuber), offering a rich layering of flavors.

Drinking Tips

1. Consumption Timing and Temperature: Arrowhead (Sagittaria sagittifolia), Mung Bean (Vigna radiata), and Kudzu Starch (Pueraria lobata) Soup is best consumed warm, at a temperature of 40–50°C (104–122°F). This helps support the release of beneficial compounds from the ingredients while avoiding digestive discomfort. It is recommended to drink one bowl each at 9–11 AM (Si hour, Spleen Meridian SP time) and 3–5 PM (Shen hour, Bladder Meridian BL time), aligning with the body’s natural rhythms. Avoid consuming the soup after refrigeration, as the cold may affect digestive comfort and reduce the beneficial effects.

2. Preparation Contraindications and Storage: This soup is best not consumed in the same meal with warming, drying, or heavy foods (such as lamb, dog meat, Chinese leek, liquor, etc.) to avoid reducing its cooling benefits. During consumption, it is recommended to reduce intake of spicy, greasy, and sweet foods to maintain the body in an open state, allowing the ingredients to work effectively. If too much soup is prepared and not finished, it can be stored in a clean, airtight glass container and refrigerated (no more than 24 hours). Before drinking, reheat to lukewarm temperature only. Do not repeatedly refrigerate and reheat, as this may promote bacterial growth.

3. Body Constitution Adjustment and Cycles: The recommended principle is “drink in three-day cycles, with intermittent days,” i.e., drink for three consecutive days, rest for one day, then decide whether to continue based on the body’s response. For those with signs of occasional dampness and warmth, continuous consumption for 7–10 days is acceptable, but there must be at least one day of rest in between. For those with a tendency toward cold, follow a “drink two days, rest one day” pattern, and avoid overconsumption. If during drinking, symptoms such as loose stools, cold sensation in the stomach, or cold hands and feet occur, it indicates that the recipe may be too cooling and incompatible with the constitution. Stop immediately, and drink a warm cup of ginger and brown sugar water (Zingiber officinale + brown sugar) to help restore balance. For children (aged 3 and above), the dose should be halved, and the amount of Sagittaria sagittifolia (arrowhead) reduced to 50 g to avoid excessive cooling.