Yin-Nourishing Lotus Root and Kudzu Soup: Recipe & TCM Benefits

Introduction to Medicinal Diet

“Fresh Lotus Root, Kudzu Root, Hyacinth Bean, and Coix Seed Yin-Nourishing Soup” is a nourishing soup originating from the folk traditions of the Jiangnan region, formulated under the guidance of Traditional Chinese Medicine theory. This soup uses seasonal fresh and tender lotus root (Nelumbo nucifera) as the sovereign ingredient, combined with kudzu root (Pueraria lobata), white hyacinth bean (Lablab purpureus), and coix seed (Coix lacryma-jobi). These four ingredients together achieve the effects of nourishing yin and moistening dryness, as well as strengthening the spleen and dispelling dampness. In the name of this medicinal food, “root” refers to kudzu root, “bean” refers to white hyacinth bean, and “seed” refers to coix seed. These three ingredients are slow-simmered together with fresh lotus root, resulting in a clear, slightly white broth with a sweet, moist taste, featuring the unique fragrance of lotus root and the soft texture of beans. It is a nourishing autumn delicacy suitable for all ages.

Under the guidance of the TCM principle of “medicinal and food homology,” this medicinal diet is particularly suitable for consumption during the transition from summer to autumn or when autumn dryness evil prevails. During this period, the body is prone to invasion by “warm dryness” or “cool dryness,” manifesting as symptoms of yin fluid deficiency such as dry mouth and tongue, dry and itchy skin, and dry stools. The Fresh Lotus Root, Root Vegetables, Bean, and Kernel Yin-Nourishing Soup (Fresh Lotus Root, Root Vegetables, Legume, and Seed Yin-Nourishing Decoction) is specifically designed for this seasonal characteristic. By adopting a food-as-medicine approach, it gently replenishes the body’s fluids and harmonizes the functions of the spleen and stomach, thereby achieving a balanced state of “nourishing yin without greasiness and moistening dryness without coldness.” This formula also addresses the “yin deficiency with dampness” constitution commonly seen in modern individuals due to irregular diet and erratic作息 (daily schedule), making it a daily soup that combines both flavor and health benefits.

Efficacy of Medicinal Diet

From the perspective of overall efficacy, the Fresh Lotus Root, Kudzu Root, White Hyacinth Bean, and Coix Seed Nourishing Yin Decoction focuses on the dual regulation of “nourishing yin” and “dispelling dampness.” Fresh lotus root, when used raw, clears heat and cools blood; when cooked, it strengthens the spleen, opens the appetite, benefits blood, and generates flesh. In this decoction, after prolonged boiling, its nature shifts from cool to warm, primarily exerting the effects of supplementing and boosting the spleen and stomach, and nourishing yin and blood. Kudzu root (Pueraria lobata) has the actions of relieving muscle and reducing fever, engendering fluids and quenching thirst, and raising yang to stop diarrhea. It is particularly adept at alleviating stiffness and pain in the neck and back, as well as dry mouth, caused by insufficient fluids. White hyacinth bean (Lablab purpureus) and coix seed (Coix lacryma-jobi var. ma-yuen) form a classic herbal pair for strengthening the spleen and transforming dampness. They help transport and transform excess water dampness in the body, preventing the yin-nourishing ingredients from becoming too cloying and obstructing the stomach.

In summary, this soup effectively alleviates various sub-health conditions caused by yin fluid depletion, such as dry throat, hoarseness, dry and flaky skin, dry and fatigued eyes, scanty dark urine, and dry stools. Additionally, it has a notable regulatory effect on symptoms due to spleen deficiency with exuberant dampness, including loss of appetite, heavy limbs, facial edema, and loose or sticky stools. Notably, during autumn when the “dryness pathogen” prevails, this soup can serve as a routine household health tonic, consumed 2 to 3 times per week. It significantly enhances the body’s adaptability to autumn dryness, maintaining moisturization and comfort in the respiratory and digestive tracts.

Functions of Traditional Chinese Medicine

Moisten the Lung and generate fluids, nourish Yin and harmonize the Stomach.

In Traditional Chinese Medicine visceral manifestation theory, the Lung is known as the “delicate organ” (娇脏), which prefers moisture and dislikes dryness, governing the skin and body hair as well as respiration. Autumnal dryness most easily impairs the Lung, leading to Lung yin deficiency with manifestations such as dry cough without sputum, scanty and sticky phlegm, nasal dryness, and throat dryness. In the Fresh Lotus Root and Kudzu Root Yin-Nourishing Decoction (鲜藕根豆仁养阴汤), both fresh lotus root (Nelumbinis Rhizoma, fresh lotus root) and kudzu root (Puerariae Radix, kudzu root) enter the Lung meridian (LU) and Stomach meridian (ST), exerting significant actions of moistening the Lung and generating fluids. The abundant mucilaginous proteins and various vitamins in fresh lotus root directly nourish the yin of the Lung and Stomach, while puerarin and daidzein in kudzu root promote secretion from the salivary and digestive glands, thereby fundamentally alleviating the state of “fluid depletion” (津枯). Together, they act like “irrigating sweet dew” upon the parched Lung and Stomach.

Ascending the clear and descending the turbid, fortifying the spleen and dispelling dampness.

Another key mechanism of this decoction in Traditional Chinese Medicine lies in its ability to “ascend clarity and descend turbidity.” Within the formula, *Pueraria lobata* (kudzu root) excels at “ascending yang,” transporting the clear yang qi generated by the spleen and stomach’s transformation and transportation upward to the head, face, and limbs, thereby alleviating dizziness, vertigo, and muscular soreness. Meanwhile, *Lablab purpureus* (hyacinth bean) and *Coix lacryma-jobi* var. *ma-yuen* (coix seed) focus on “descending turbidity” by fortifying the spleen and disinhibiting dampness, expelling excess water-dampness and turbid qi from the body through urination. Fresh *Nelumbo nucifera* (lotus root) acts as a “transit hub” in this process; its rich dietary fiber promotes intestinal peristalsis, aiding in the elimination of waste products. Thus, through this interplay of ascending and descending, supplementing and draining, the qi mechanism of the entire middle burner is restored to smooth circulation, simultaneously nourishing yin and clearing dampness, while avoiding the adverse effects such as abdominal distention and poor appetite that may result from purely nourishing yin.

Indications

This medicinal food has a neutral nature and a wide range of applicability, making it especially suitable for the following groups. The first group consists of individuals with a **Yin deficiency constitution**, who commonly present with a lean body frame, heat in the palms and soles, dry mouth and throat, preference for cold drinks, flushed cheeks, a red tongue with scant coating. During autumn and winter, their Yin fluids become even more depleted, and consuming this soup can effectively relieve internal heat and dryness. The second group comprises those with a **Qi and Yin deficiency pattern**, who, in addition to Yin deficiency, also experience spirit fatigue and lassitude, shortness of breath and reluctance to speak, spontaneous sweating and night sweating. In this soup, *Lablab purpureus* (hyacinth bean) and *Coix lacryma-jobi* (coix seed) serve to fortify the spleen and boost Qi, while fresh *Nelumbo nucifera* (lotus root) and *Pueraria lobata* (kudzu root) nourish Yin and generate fluids. Together, they simultaneously supplement Qi and Yin, complementing each other perfectly.

The third category comprises individuals with a complex constitution combining **Spleen Qi Deficiency with Dampness Encumbrance** (脾虚湿盛) and **Insufficiency of Yin Fluids** (阴津不足). These individuals commonly present with a sticky sensation in the mouth, poor appetite, stools that are initially dry and later loose or sticky and unsatisfying, accompanied by Yin deficiency signs such as dry skin and withered hair. This soup, characterized by its ability to **nourish Yin without aggravating Dampness** and **resolve Dampness without damaging Yin**, perfectly suits the needs of this conflicting constitution. Additionally, office workers exposed to **Autumn Dryness** (秋燥), young people whose fluid consumption is depleted due to frequent late nights, middle-aged and elderly women experiencing **Yin Deficiency with Effulgent Fire** (阴虚火旺) during menopause, and those in the later stage of a common cold with residual heat and fluid depletion may all safely and effectively use this soup as a therapeutic dietary dish.

Contraindicated Populations

Although the Fresh Lotus Root, Kudzu Root, White Hyacinth Bean and Coix Seed Yin-Nourishing Soup is both medicinal and edible with a neutral nature, certain individuals should still use it with caution or avoid it entirely. The first group comprises those with severe **Spleen and Stomach Deficiency Cold**, presenting with epigastric cold pain (warmth relieves pain; cold exacerbates), loose or undigested stools, tastelessness without thirst, and a pale, enlarged tongue with a white, slippery coating. While the white hyacinth bean (Semen Lablab Album) and coix seed (Semen Coicis) in this soup support the Spleen, fresh lotus root (Nelumbinis Rhizoma Recens) and kudzu root (Puerariae Radix) are slightly cool in nature; for individuals with insufficient Spleen Yang and exuberant Cold-Dampness, this may worsen diarrhea and abdominal pain. If such individuals wish to consume the soup, it is recommended to add 3 slices of fresh ginger (Zingiberis Rhizoma Recens) and 5g of tangerine peel (Citri Reticulatae Pericarpium) while cooking, in order to warm the Middle Burner, dispel Cold, harmonize the Stomach, and stop vomiting.

The second category includes individuals in the early stage of “External Wind-Cold” or “Cold-Dampness Common Cold”, presenting with aversion to cold and fever, headache and body aches, nasal congestion with clear watery discharge, and cough with thin white sputum. At this stage, the pathogenic factor resides in the exterior, and treatment should primarily focus on releasing the exterior with acrid-warm herbs. Yin-nourishing substances should not be used prematurely, as this would “close the door and trap the bandits”, causing the external pathogen to linger and become difficult to resolve. The third category is “pregnant women”. Although most ingredients in this soup are safe for pregnancy, Coicis Semen (Coix seed) has a certain stimulating effect on uterine smooth muscle, theoretically increasing the risk of miscarriage. Therefore, pregnant women in the first trimester or those with a history of habitual miscarriage should avoid consuming it. Additionally, individuals with allergies to legumes or lotus root should also refrain from use.

Ingredient Ratio in Formula

The following is the precise formula ratio for one serving (approximately 500 ml), for reference:

Fresh lotus root (with nodes) 150 grams – select lotus root with smooth skin, no dark spots, and clean pores; wash without peeling, cut into rolling knife chunks. Kudzu root (Pueraria lobata, fresh preferred, dried acceptable) 30 grams – if using dried, soak for 2 hours in advance. White hyacinth bean (Lablab purpureus) 20 grams – soak in clean water for 4–6 hours in advance, or refrigerate overnight, to shorten cooking time and fully release active constituents. Coix seed (Coix lacryma-jobi) 20 grams – also requires pre-soaking. Optionally add 3 red dates (Ziziphus jujuba, pitted) and 10 goji berries (Lycium barbarum) to enhance sweetness and support visual acuity, plus 1200 ml of clean water for simmering. If a meaty flavor is desired, add 100 grams of lean pork or pork ribs (blanched in boiling water first) and simmer together to enrich the soup.

Cooking method

Step 1: Ingredient Preparation – Gently scrub the surface of fresh lotus root under running water using a sponge brush. Cut off the stem ends but retain the skin (which is rich in dietary fiber and polyphenols). Slice into approximately 2 cm thick rolling-cut pieces, immediately submerge in clean water with a few drops of white vinegar to prevent oxidation and discoloration. For fresh kudzu root (Gegen), peel and cut into thick slices; for dried kudzu root, rehydrate in advance and then slice. Rinse white hyacinth bean (Bai Biandou) and coix seed (Yiyiren) separately, then soak in ample clean water for at least 4 hours. Wash red dates (Hongzao) and remove pits; rinse goji berries (Gouqizi) briefly.

Step two: Blanching to remove astringency – if adding meat, place lean pork or pork ribs in cold water, add three slices of fresh ginger (Zingiber officinale) and one tablespoon of cooking wine. Bring to a boil over high heat, skim off the foam, then remove and rinse with warm water. For the vegetarian version, blanch the soaked white hyacinth bean (Lablab purpureus) and coix seed (Coix lacryma-jobi var. ma-yuen) in boiling water for 3 minutes to eliminate the bean-like odor and slight astringency.

Step Three: Slow Simmering. Place all prepared ingredients (fresh lotus root pieces, Pueraria lobata slices, white hyacinth beans, Coix seed, and red jujubes) into an earthenware or clay pot (avoid using an iron pot to prevent the lotus root from discoloring). Add 1,200 ml of clean water. Bring to a boil over high heat, then immediately reduce to a gentle flame (lowest heat), cover, and slow-simmer for 1.5 hours. During this time, open the lid as little as possible; if additional water is needed, add only boiling hot water to avoid a sudden temperature drop that could affect the flavor and extraction of active constituents.

Step 4: Seasoning and finishing: After 1.5 hours of simmering, uncover and add Goji Berries (Lycium barbarum) and a small amount of salt (no more than 1g per bowl, just enough to enhance flavor without tasting salty). Continue simmering for 5 minutes, then turn off the heat. Note that Goji Berries should not be cooked for too long, or they will lose their color and some nutrients. After turning off the heat, let it rest for 10 minutes until the soup cools to about 60°C. Skim off any surface oil (if meat was used), then serve. All ingredients in the soup are edible; especially the fresh Lotus Root (Nelumbo nucifera) and White Hyacinth Beans (Lablab purpureus) have a soft, sticky texture and should be chewed slowly.

Drinking Tips

1. Optimal Drinking Time and Frequency: It is recommended to take the decoction warm between 9:00 am and 11:00 am (Spleen Meridian time, SP) or between 5:00 pm and 7:00 pm (Kidney Meridian time, KI), as the body’s absorption and utilization of the yin-nourishing components are highest during these periods. For daily health maintenance, drink 2 to 3 times per week—no need for daily consumption. If used to alleviate significant discomfort caused by autumn dryness, it may be taken for three consecutive days, then switched to every other day to consolidate the effects.

2. Flavor Pairing and Personalized Adjustments: This soup is best enjoyed with a mild, natural flavor, but if it seems too bland, you may add 5 pitted dried longans (Longan Arillus) 5 minutes before turning off the heat to enhance sweetness and thickness, with the additional benefit of nourishing heart blood. For those with pronounced internal燥热 (dry-heat) manifesting as swollen and painful gums or mouth sores, add 15g of lotus seeds with plumule (Nelumbinis Semen cum Plumula) and cook together to strengthen the effect of clearing the heart and calming the spirit. For individuals with yang deficiency (阳虚) who tend to feel cold, it is recommended to add 5 slices of fresh ginger (Zingiber officinale) and a small piece of cinnamon bark (Cinnamomum cassia, about 3g) to balance the cold nature of the soup.

3. Storage and Reheating Methods for Leftover Soup: This soup contains no complex herbal ingredients, and consuming it the following day does not compromise safety; however, flavor and nutritional value will diminish over time. It is recommended to strain the leftover soup to remove the dregs and store it refrigerated for no more than 24 hours. When reheating, ensure it is brought to a full boil (boiling for at least 2 minutes) to eliminate any potentially proliferating microorganisms. Do not use a microwave for short-term heating, as uneven heat distribution may cause gastrointestinal discomfort. For soup taken directly from the refrigerator, it is best to pour it into a small clay pot and gently heat over medium-low flame until it just begins to simmer, while adding a small amount of boiling water to restore its original concentration.