Malva Seed and Snakehead Fish Soup: A Traditional Chinese Medicinal Tonic

Introduction to Medicinal Diet

Malva Seed and Snakehead Fish Soup is a classic remedy-in-food from Lingnan folk tradition, integrating both medicinal therapy and dietary nourishment. Its origins can be traced back to the medicinal cuisine principles recorded in the Qing dynasty *Supplement to the Compendium of Materia Medica* (Bencao Gangmu Shiyi). Malva seed (Malva verticillata seed) is the dried, ripe seed of the mallow plant (Malvaceae). Its nature is slippery and draining, its flavor sweet and cold; since ancient times it has been an essential herb for promoting urination and relieving painful urinary dysfunction (Lin Bi). The “raw fish” refers to *Channa argus* (northern snakehead fish), which has tender flesh, few bones, and a savory taste. In the *Dietary Materia Medica* (Shiliao Bencao), it is recorded as an excellent substance for “tonifying the Spleen and promoting water metabolism, removing blood stasis and generating new tissue.” When combined in soup, the Malva seed’s ability to clear and drain damp-heat is brought into play, while the high-quality protein and gelatinous substances from the snakehead fish make the medicinal effect gentle yet sustained. This soup thus serves as a nourishing and restorative formula for individuals with damp-heat constitution or those recovering after surgery.

This soup is especially popular in the Guangdong and Guangxi regions, where it is often consumed as a seasonal dietary remedy for promoting postpartum lactation, resolving edema, or relieving summerheat. The finished soup has a milky-white, creamy appearance, tastes sweet and smooth, and lacks any bitter or gritty residue from medicinal herbs, truly embody the essence of TCM medicinal cuisine: “medicine borrows the power of food, and food enhances the efficacy of medicine.” Modern nutrition studies have also confirmed that Dongkuizi (Semen Malvae Verticillatae, Chinese mallow seed) is rich in mucopolysaccharides and dietary fiber, which can promote intestinal peristalsis and urinary excretion; meanwhile, raw fish (snakehead fish, Channa argus) provides easily absorbable collagen and various amino acids. The synergistic combination of these ingredients creates a wise pairing that balances both taste and therapeutic effect.

Efficacy of Medicinal Diet

The core effects of Dongkuizi (Malva verticillata seed) and Raw Fish Soup are concentrated in two main aspects: “promoting urination and treating strangury, clearing heat and reducing swelling” and “tonifying deficiency and promoting lactation, removing stasis and generating new tissues.” For symptoms such as difficult urination, dribbling with pain, and lower limb edema caused by damp-heat pouring downward, this soup utilizes the slippery nature of Dongkuizi to help unblock the water passage and expel excess damp turbidity from the body. At the same time, the tonifying effect of raw fish can prevent excessive diuresis from damaging vital qi, achieving the effect of “promoting urination without harming.” Clinical observations have found that for patients with mild urinary tract infection or edema due to chronic nephritis, moderate consumption of this soup as an adjunct to medication can significantly improve urinary difficulty and sensations of lumbar soreness and fatigue.

Furthermore, this decoction is widely applied in the fields of obstetrics and gynecology. In postpartum women with qi and blood deficiency, lactation obstruction, or thin breast milk, consumption of this soup often leads to a rapid increase in milk volume and a thicker consistency. This is because *Malva verticillata* (cluster mallow seed) itself has the effect of “promoting lactation”; the *Compendium of Materia Medica* clearly records that it “unblocks the breast milk of women.” Meanwhile, fresh snakehead fish (*Channa argus*) both nourishes blood and generates tissue, and also promotes wound healing, making it especially suitable for postpartum women after cesarean section or episiotomy. For patients in the later stage of traumatic injury with residual local ecchymosis and swelling, this decoction can also assist in activating blood and dispersing stasis, thereby accelerating tissue repair.

The role of Traditional Chinese Medicine

Based on the theory of medicinal properties, flavors, and meridian entry in Traditional Chinese Medicine, *Malva verticillata* seed (Dongkuizi) is sweet in flavor and cold in nature. It primarily enters the Small Intestine (SI) and Bladder (BL) meridians, and also enters the Large Intestine (LI) meridian. Its nature is slippery like oil, excelling at “promoting urination and defecation” (tong li er bian). It can both clear and drain heat from the Bladder to treat turbid urinary discharge (lin zhuo), and moisten the intestines to relieve constipation. *Malva verticillata* seed also has the unique property of “unblocking the mammary orifices” (tong ru qiao), allowing it to disperse stagnation in the breast channels and collaterals, thereby promoting smooth lactation. Fresh snakehead fish (Channa argus, shengyu), on the other hand, is sweet in flavor and cold in nature, specifically entering the Spleen (SP) and Stomach (ST) meridians. Its effect lies in a balance between “tonifying the Spleen and Stomach” (bu pi yi wei) and “promoting urination to reduce edema” (li shui xiao zhong)—the Spleen governs the transportation and transformation of fluids; when Spleen qi is robust, water-dampness resolves itself. When Stomach qi is vigorous, there is a source for the generation of qi and blood, thereby providing the material basis for the production of breast milk.

compatibility mechanism

When used together, Malva verticillata seed (cluster mallow seed) acts as the vanguard for “unblocking,” while fresh fish serves as the rearguard for “supplementing.” This combination of unblocking and supplementing allows dampness-turbidity to be dispersed and eliminated from the lower jiao without damaging yin blood, and breast milk will naturally flow due to the abundance of qi and blood. If supplemented with a few slices of Zingiber officinale (ginger) and a small amount of Citri Reticulatae Pericarpium (tangerine peel), these ingredients can moderate the cold nature of Malva verticillata seed, preventing excessive laxative effects that might harm the stomach, while also regulating qi and harmonizing the middle, making the entire decoction more balanced in property. This formulation principle of “unblocking without purging, supplementing without causing stagnation” embodies the TCM wisdom of “mutual assistance of dissimilar agents,” and is especially suitable for complex constitutions with mixed deficiency and excess, or root deficiency with branch excess.

Indicated Population

This soup is most suitable for the following three categories of people: First, individuals with a Damp-Heat constitution—commonly presenting with a yellow, greasy tongue coating, scanty and dark yellow urine, sticky and unsatisfying stools, and a tendency to facial or lower limb edema. The soup of Cluster Mallow Seed (Malva verticillata) and Snakehead Fish (Channa argus) can clear Damp-Heat and promote the free flow of water passages. Second, postpartum women with insufficient lactation or milk stasis—especially within the first week after delivery when qi and blood have not yet fully recovered and the mammary ducts are not fully open. This soup both tonifies deficiency and promotes lactation, addressing both root and branch. Third, patients with mild urinary system disorders—such as those in the recovery phase of non-infectious chronic pyelonephritis or cystitis, or those with simple urethral syndrome presenting with difficult urination. It can be used as an everyday supportive dietary therapy.

Fourth, for individuals suffering from poor lower limb circulation or mild edema due to prolonged desk work and sedentary lifestyles—occupational groups such as computer workers, teachers, and drivers often experience “downward flow of water-dampness” due to stagnation of qi and blood circulation. Consuming this soup may help alleviate the heavy sensation in the lower limbs. Fifth, for those in the recovery period after traumatic injuries or surgery—the collagen-rich fresh snakehead fish (*Channa argus*), combined with the blood-activating and diuretic effects of cluster mallow seeds (*Malvae Semen*), can promote the absorption of blood stasis, reduce local swelling, and accelerate wound healing. However, it should be noted that the aforementioned individuals should consult a licensed TCM practitioner before consumption to ensure compatibility between their constitution and the medicinal properties.

Contraindicated Groups

Although Malva verticillata seed and snakehead fish (Channa argus) soup has significant effects, it is not suitable for everyone. The following four groups of people must strictly avoid it: First, those with Spleen-Stomach Deficiency Cold pattern and loose stools—Malva verticillata seed is cold in nature with a slippery-laxative property, and snakehead fish is also cold-natured. The double cold accumulation can easily damage Spleen Yang, leading to aggravated abdominal pain and diarrhea, and even complete loss of appetite. Second, it is contraindicated throughout pregnancy—Malva verticillata seed has the effect of stimulating uterine smooth muscle. Ancient medical texts clearly record its tendency to cause miscarriage. In early pregnancy, it may induce abortion, and in late pregnancy, it may trigger premature labor, posing a very high safety risk.

Third, for those with Kidney Yang Deficiency and Decline who experience clear, copious, and frequent urination—this group already has Lower Burner Deficiency Cold and impaired securing and astringing functions. Taking cold and slipperiness-natured substances further weakens Kidney Yang, exacerbating enuresis. Fourth, for individuals allergic to fish protein—raw fish is a high-protein food. Those with an allergic constitution may experience skin rashes, itching, or even laryngeal edema, so it must be absolutely avoided. Additionally, for those taking anticholinergic drugs such as atropine or anisodamine, the slippery and laxative effect of Dongkui Zi (Malva verticillata seed, Winter Mallow Seed) may be inhibited, leading to abdominal distension; it is also advised to discontinue consumption. In all cases of acute exacerbation of chronic diseases, or in those with extremely weakened constitution, use should be carried out cautiously under the guidance of a TCM practitioner.

Food ingredient formula ratio

Below is the precise formula for a single serving (approximately 600 ml of finished soup), suitable for adult women or ordinary adults to prepare according to this ratio: 15 grams of dried Malvae Semen (cluster mallow seed / Qinghao) – if using fresh, 30 grams would be required, but fresh seeds are difficult to obtain and have weaker medicinal effect; it is recommended to prioritize processed dried decoction pieces; 1 live fresh fish (Channa argus, snakehead fish), with a net weight of approximately 400–500 grams, preferably selecting one with a smooth body surface, abundant slime, and a glossy black back; 50 grams of lean pork (to enhance flavor, not essential, can be omitted by vegetarians); 6–8 slices of old ginger (Zingiberis Rhizoma Recens), approximately 10 grams; a small piece of Citri Reticulatae Pericarpium (tangerine peel / Chenpi), about 2 grams.

Seasonings: only an appropriate amount of table salt (approximately 2-3 grams, added just before removing from heat), and 5 ml of cooking wine (used for blanching to remove fishiness). Special attention: Malvae Verticillatae Semen (cluster mallow seeds) are light in weight and tend to float on the surface during decoction. It is recommended to place them in a clean gauze bag and tie it tightly, which facilitates the extraction of active constituents while preventing seed residue from mixing into the soup and affecting the texture. After slaughtering the fresh fish, be sure to thoroughly remove the black membrane and blood residue from the abdominal cavity—this is key to achieving a clear, bright soup without any fishy odor. If a more milky-white appearance is desired, add an extra 5 grams of lard or peanut oil when frying the fish. However, patients with hyperlipidemia should reduce the amount.

Preparation Method

Step 1: Material Preparation and Pre-processing

Rinse Malvae Fructus (Cluster Mallow Seed) quickly under running water—do not soak for too long to avoid loss of active constituents—then place it in a gauze bag and tie the mouth tightly for later use. Have the fishmonger kill and scale the fresh fish, remove the gills and internal organs. Immediately upon returning home, rinse the abdominal cavity with running water, scrape off any blood adhering to the bone and the black membrane with a small knife. Then make three diagonal cuts on each side of the fish (deep enough to reach the bone). Rub with a small amount of rice wine and a few ginger slices, and marinate for 10 minutes to remove any fishy odor.

Step 2: Pan-fry the fish to set the aroma.

Take a clay pot or ceramic soup pot (do not use an iron pot to prevent the soup from turning dark), place it on the stove and heat it. Pour in 10 ml of peanut oil, and swirl the pot to coat the bottom evenly. Add ginger slices and fry until the edges are slightly scorched. Then pat the marinated raw fish dry with paper towels, gently place it into the pot, and fry over medium heat until both sides are golden and set (about 3 minutes per side). This step locks in the fish’s umami and promotes protein emulsification for a milky white broth. For the lean pork slices, blanch them in a separate pot of cold water for 1 minute, then remove and rinse off any blood foam; set aside.

Step three: Simmer over low heat.

The cooked fish, along with the ginger slices, remains in the pot. Pour in a sufficient amount of boiling water (approximately 1800 ml) directly—the water must be added all at once, without topping up during cooking. Add the gauze bag containing cluster mallow seed (Malva verticillata seed) and the blanched lean meat slices. Then, add tangerine peel (Citri Reticulatae Pericarpium). Bring to a boil over high heat, skim off any foam, reduce to a low heat (maintaining a gentle simmer with the soup surface barely bubbling), cover, and slow-simmer for 40 minutes. At this point, the soup color will gradually transition from clear to white, finally becoming as rich and creamy as milk.

Step Four: Flavor Adjustment and Finishing

Five minutes before turning off the heat, use chopsticks to remove the herb bag containing Malva verticillata seeds (Dongkuizi, *Malva verticillata* seed) – gently squeeze the bag to allow residual decoction to drip into the soup – and discard the ginger slices and tangerine peel (Chenpi, *Citri Reticulatae Pericarpium*). Scoop out the lean meat slices for other use (or leave them in the soup if preferred). Season with table salt, stir well, and let sit for 2 minutes to allow the salt to permeate. Finally, strain the soup through a fine mesh sieve to remove any tiny bone fragments, pour into a large bowl, and garnish with a sprinkle of chopped scallions or goji berries (*Lycium barbarum*). Note: Do not add salt too early, as it would cause the fish protein to coagulate prematurely, hindering the release of umami compounds and compromising the emulsification of the broth.

Drinking Tips

1. Optimal Administration Times: It is recommended to take it warm between 7–9 AM (Stomach Meridian [ST] on duty) or 1–3 PM (Small Intestine Meridian [SI] on duty). During these periods, the body’s digestive absorption and water-draining, turbidity-expelling functions are most active, thereby maximizing the efficacy of the medicinal diet. Avoid taking it on an empty stomach; instead, first consume a small amount of staple food to line the stomach, preventing the cold and slippery nature from directly irritating the gastric mucosa.

2.Treatment Course and Frequency: For daily health maintenance, consume 2–3 times per week, for no more than 4 consecutive weeks. For adjunctive treatment of postpartum lactation insufficiency or mild edema, one dose may be taken daily for 3–5 days, and discontinued once symptoms improve. Long-term continuous use should be avoided to prevent over-promotion of urination from consuming yin fluids, or excessive coldness from damaging spleen yang.

3. Flexible Formula Adjustments: For those with marked qi deficiency, shortness of breath, and fatigue, add 10 g of Huang Qi (Astragalus membranaceus, Astragalus Root) before removing from the pot to enhance the actions of supplementing qi and promoting water dispersal. For those with concurrent constipation, increase Dong Kui Zi (Malva verticillata seed, Mallow Seed) to 20 g and add 5 g of Jue Ming Zi (Cassia seed, Cassia Seed) to decoct together. For those with spleen-stomach deficiency cold who still need to promote lactation, increase the amount of ginger slices to 15 g and add 3 Hong Zao (Ziziphus jujuba, Red Dates) to buffer the cold nature. All adjustments are recommended to be carried out under the guidance of a licensed TCM practitioner; do not blindly increase dosages on your own.

4. Storage and Reheating: If a larger quantity is prepared at one time, separate the leftover soup from the fish before storage. The liquid can be refrigerated for up to 24 hours or frozen for up to 1 week. When reheating, bring it to a full boil, but avoid reheating for more than 5 minutes to prevent excessive degradation of the mucilaginous polysaccharides in *Malva verticillata* (Cluster Mallow Seed), which may reduce efficacy. Note: Solidified fat on the surface of overnight soup is normal—stir well after heating. However, if a rancid or sour odor is detected, discard immediately.