Water Caltrop and Hovenia Dulcis Hangover Soup Recipe & Benefits

Introduction to Medicinal Diet

Water Caltrop and Hovenia Dulcis Hangover-Relief Decoction is a classic medicinal dietary remedy for alleviating alcohol intoxication, passed down from the folk traditions of Jiangnan. It is made by simmering fresh, delicate water caltrop (Trapa natans) harvested in autumn together with the medicinally and food-grade Hovenia dulcis fruit (Semen Hoveniae), supplemented with a small amount of fresh ginger (Zingiber officinale) and red jujube (Ziziphus jujuba) carefully prepared. Water caltrop has long been known as the “water peanut” for its white, crisp, and tender flesh; not only is it delicious, but it has also been recorded in ancient herbal texts such as the *Compendium of Materia Medica (Bencao Gangmu)* for its ability to “relieve alcohol toxicity and clear damp-heat.” Hovenia dulcis fruit, also called “hooked date” or “chicken-claw pear,” has a peculiar appearance but tastes sweet as honey. It is a highly regarded specific herb for countering alcohol intoxication in TCM formulas, earning the reputation: “A thousand cups may be drunk without intoxication thanks to Hovenia dulcis.”

This soup skillfully blends the moistening quality of water caltrop (Trapae Bispinosae Fructus) with the natural sweetness of raisin tree seeds (Hoveniae Semen, Fructus Hoveniae), presenting a light, pale-yellow broth that offers a clean, sweet taste with a subtle grain-like aroma and a lingering sweet aftertaste. Unlike common commercial chemical hangover remedies, it embodies the TCM principle of “medicine and food sharing the same origin” (药食同源). By gently regulating the body, it helps accelerate alcohol metabolism and alleviate post-drinking discomfort, making it particularly suitable as a soothing, nourishing soup after gatherings with friends and family or business banquets.

Efficacy of Medicinal Diet

The core efficacy of *Lingjiao Zhiju Hangover Decoction* lies in the dual synergy of “alcohol toxin resolution” and “liver and stomach protection.” *Lingjiao* (*Trapa natans*, water caltrop) is rich in starch, protein, and various vitamins. It forms a gentle protective film in the middle burner (*zhongjiao*), reducing direct irritation and damage to the gastric mucosa caused by alcohol. Meanwhile, its action of clearing heat and promoting urination (*qingre lishi*) helps the body accelerate the excretion of alcohol breakdown products. *Zhijuzi* (*Hovenia dulcis* seed, Japanese raisin tree seed) contains unique active components such as dihydromyricetin. Modern research indicates that these substances can significantly enhance the activity of alcohol dehydrogenase (*yichun tuohuamei*) in the liver, enabling alcohol to be converted more rapidly into harmless acetic acid, thereby greatly shortening the duration of intoxication and alleviating hangover symptoms such as headache and nausea.

For the common symptoms after alcohol consumption such as dry mouth and tongue, dizziness and vertigo, chest oppression and nausea, this soup can also produce excellent effects. The sweet and cool nature of *Trapa bispinosa* (water caltrop) can clear heat and engender fluid, effectively alleviating the post-drinking heat sensation and throat dryness. The sweet and neutral quality of *Hovenia dulcis* (oriental raisin tree seed) can harmonize the middle burner and descend rebellious qi, soothe the chest and rectify qi, helping to calm the discomfort caused by stomach qi ascending counterflow. When consumed regularly in moderate amounts, it also aids in improving conditions such as Damp-Heat in the Spleen and Stomach and liver fatigue resulting from frequent alcohol consumption.

The actions of Traditional Chinese Medicine

From the perspective of Traditional Chinese Medicine theory, the mechanism of Lingjiao Zhiju Jiejiu Tang (Water Caltrop and Hovenia Dulcis Antialcoholic Decoction) revolves around three key actions: “clearing, disinhibiting, and harmonizing.” Water caltrop (Trapa bispinosa) enters the Spleen (SP) and Stomach (ST) meridians; its nature is sweet and cool, and it excels at clearing the damp-heat generated in the Spleen and Stomach by alcoholic toxins. TCM holds that “alcohol is greatly heating and toxic,” and excessive drinking can cause pathogenic damp-heat to accumulate in the Middle Jiao, disrupting the ascending and descending functions of the Spleen and Stomach, leading to symptoms such as nausea, vomiting, and epigastric distension and fullness. Water caltrop acts like a gentle brush, able to cleanse the turbid damp-heat adhering to the gastrointestinal tract and restore the proper qi movement of the Spleen and Stomach.

Hoveniae Semen (Semen Hoveniae, seed of Japanese Raisin Tree) enters the Heart (HT), Spleen (SP), and Liver (LR) meridians. Its ability to resolve alcohol toxicity has been highly praised throughout历代 medical literature. *Shi Liao Ben Cao* (Materia Medica for Dietotherapy) records that it “can resolve alcohol toxicity, quench thirst, and relieve restlessness.” *Ben Cao Shi Yi* (Supplement to the Compendium of Materia Medica) further states explicitly: “Hoveniae Semen resolves alcohol toxicity; consuming it can sober a person.” Hoveniae Semen is sweet in flavor and neutral in nature; it excels at promoting the flow of water pathways, guiding damp-heat downward via urination. At the same time, its sweet and moistening quality can soften the Liver and ease urgency, protecting the Liver from damage by alcohol toxicity. When these two herbs [note: referring to combination with another herb mentioned in previous context, but here only one herb is described; the text says “两者配伍使用” meaning “when the two are used in combination,” implying there is a prior herb not shown in this excerpt] are used together, one clears, one promotes diuresis, one moistens, one harmonizes, forming an excellent alcohol-resolving efficacy of “clearing above, promoting below, and taking effect from both directions.”

The subtlety of herb combination

In the soup, two slices of fresh ginger (Zingiber officinale) are added as a companion, leveraging its pungent-warm nature to warm the stomach and disperse cold, preventing the water caltrop (Trapa natans) from being overly cold and damaging the spleen yang. It also descends rebellious qi and stops vomiting, alleviating post-alcohol nausea. Three red dates (Ziziphus jujuba) supplement the middle qi, nourish the blood and calm the spirit, tending to both qi and blood while relieving the effects of alcohol. Thus the entire formula is clearing without harming, draining without deficiency, embodying the wisdom of TCM medicated diet in supporting the upright and dispelling the pathogenic.

Indications

Water Caltrop and Hovenia Dulcis Hangover-Relieving Decoction (菱角枳具解酒汤) is most suitable for individuals who have a daily habit of drinking alcohol or who frequently participate in social engagements. Whether at business banquets, gatherings with friends, or holiday celebrations, consuming this decoction before or after drinking can effectively reduce the impact of alcohol on the body, helping to maintain mental clarity and physical comfort. For those who occasionally drink excessively out of joy and experience acute alcohol intoxication symptoms such as dizziness, facial flushing, rapid heartbeat, nausea, and vomiting, drinking a bowl of this hot decoction can quickly relieve discomfort and accelerate return to a normal state.

Additionally, individuals with a pronounced pattern of Spleen and Stomach Damp-Heat, manifesting as dry mouth, bitter taste, and sticky, unformed stools, as well as those whose liver burden has increased due to chronic alcohol consumption or irregular diet, leading to mildly abnormal liver function indicators, may also take this soup as a supportive daily tonic. Its mild nature and clear, moistening texture make it an ideal nourishing choice for those in the recovery phase after a hangover, who need to quickly replenish fluids and nutrients.

Contraindicated Populations

Although Lingjiao Zhiju Decoction (Trapa bispinosa [water caltrop] and Hovenia dulcis [Japanese raisin tree] Decoction for Relieving Alcohol Intoxication) is mild in nature, it is not suitable for all populations. Water caltrop is sweet and cool in property. For individuals with Spleen and Stomach deficiency cold pattern—those prone to diarrhea with loose stools, aversion to cold, and persistently cold hands and feet—excessive consumption is not recommended, as it may aggravate cold-dampness symptoms in the gastrointestinal tract, leading to abdominal pain or loose stools. If such individuals wish to consume this decoction, it is advisable to appropriately increase the dosage of Zingiber officinale (ginger) to counteract its cold nature, or to attempt it only after the symptoms have alleviated.

People who are allergic to Trapa natans (water caltrop) or Semen Hoveniae (oriental raisin tree seed) should strictly avoid this decoction. Those with an allergic constitution should initially try a small amount and monitor their body’s response upon first consumption. Furthermore, due to their unique physiological state, alcohol itself is contraindicated for pregnant and breastfeeding women, and the active ingredients in the medicinal food may affect the fetus or infant through the placenta or breast milk; therefore, this decoction is not recommended for them. Individuals with severe liver or kidney dysfunction, as well as those taking specific medications, should consult a professional TCM practitioner before consuming any medicinal food to prevent unnecessary adverse interactions.

Proportions of Ingredients in the Formula

Fresh water caltrop kernel (Trapa bispinosa) 150 g (if using dried water caltrop instead, reduce the amount to 75 g)

Hovenia dulcis (Japanese raisin tree seed) 30 g

Fresh Ginger 10 g (approximately two thick slices)

Ziziphus jujuba (Jujube) 15 g (approx. 3–4 pieces)

Plain water, 1200 ml

Rock sugar 5g (adjustable according to personal taste, or omit)

Preparation Method

Step 1: Prepare the ingredients. Remove the shells of fresh water caltrops (Trapa bispinosa) to obtain the kernels, gently rub them under clean water to remove the surface membrane, and drain thoroughly. If using dried water caltrops, soak them in warm water for 2 hours in advance until fully rehydrated. Rinse Hovenia dulcis (Japanese raisin tree fruit) quickly under running water to remove dust. Wash fresh ginger (Zingiber officinale) and cut into thick slices with the skin on. Wash red dates (Ziziphus jujuba) and gently crack them with the back of a knife to facilitate flavor release.

Step 2: Soak the Semen Hoveniae. Place the prepared seeds in a bowl, add 200 ml of clean water, and soak for 30 minutes to allow them to fully absorb water and soften, which facilitates the extraction of active constituents during decoction. Do not discard the soaking water; it will be used together with the seeds in the pot later.

Step 3: Decoction of the base. Pour the soaked Hovenia dulcis (Japanese Raisin Tree) seeds along with the soaking water into a clay pot or ceramic soup pot. Add the remaining 1000 ml of clean water, cover with a lid, bring to a boil over high heat, then reduce to a low heat and simmer gently for 20 minutes to allow the medicinal properties of the Hovenia dulcis seeds to fully infuse into the decoction.

Step 4: Add the main ingredients. Place the water caltrop kernels (Trapa natans), ginger slices (Zingiber officinale), and split red dates (Ziziphus jujuba) into the soup pot. Cover with the lid and continue to simmer over low heat for 25–30 minutes, until the water caltrop kernels become soft and glutinous, the soup turns a pale yellow color, and a sweet, clear mixed fragrance is released.

Step 5: Season and finish. Two minutes before turning off the heat, add rock sugar (Saccharum Granorum) and stir gently until dissolved. Taste the soup and adjust sweetness to your liking, then remove from heat. Ladle the soup together with the water caltrops (Fructus Trapae Natantis) and Chinese dates (Fructus Jujubae) into a bowl. Serve warm for best effect.

Tips for Consumption

1. The optimal time for consumption is to drink a small bowl (approximately 150 ml) half an hour before drinking alcohol, which can form a protective layer on the stomach wall and slow down alcohol absorption. If taken after drinking, it should be consumed hot within one hour of drinking for the most significant hangover-alleviating effect. Do not consume an iced version immediately after drinking, as this may cause cold and heat to clash and damage Stomach Qi.

2. The water caltrop (Trapa natans) and red dates (Ziziphus jujuba) in the soup are also edible. Water caltrop is soft and fragrant, while red dates are sweet and nourishing; consuming them together with the broth provides more comprehensive nutrition. However, the seeds of Hovenia dulcis (Japanese raisin tree) have coarse fibers and poor taste, so it is recommended to only drink the broth and avoid eating the residue to prevent digestive discomfort.

3. This decoction is primarily intended for alcohol detoxification and liver protection. It should not be consumed in large quantities daily as a routine supplement; generally, it is advisable to drink it no more than three times per week. For relieving alcohol intoxication, one bowl per serving is sufficient, and excessive consumption is unnecessary. If you are currently taking liver-protecting or anticoagulant medications, it is recommended to consult a physician before drinking it to avoid interfering with the efficacy of the drugs.