Fish Maw and Longan Stewed Duck: A TCM Medicinal Diet Guide

Fish Maw and Longan Stewed Water Duck – A Popular Science on TCM Medicinal Diet

Introduction to Medicinal Diet

Fish maw and longan stewed with wild duck is a classic nourishing medicinal cuisine that blends the essence of marine delicacies with poultry. It is especially revered in the Lingnan region. Fish maw is the dried swim bladder, with the best quality sourced from deep-sea large fish, rich in natural collagen and various trace elements. Longan (Longyan Rou, Dimocarpus longan), also known as Guiyuan, is warm in nature and sweet in flavor, commonly used in Chinese medicine to tonify blood and calm the spirit. The wild duck selected is typically the mallard (Anas platyrhynchos) or shelduck; its flesh is firm with low fat content, and its yin-nourishing effect far surpasses that of ordinary domestic duck. The combination yields the gelatinous moisture of fish maw, the sweetness of longan, and the delicate freshness of wild duck. The soup is clear as jade, with a mellow and lingering sweetness on the palate. Balanced in meat and botanical elements, it is a nourishing delicacy suitable for all ages.

This formula has been widely circulated among the people for a long time, commonly used in postpartum regulation, post-surgical recovery, and autumn-winter tonic supplementation. Ancient texts such as the *Shiliao Bencao* (Materia Medica for Dietotherapy) record that duck meat “supplements deficiency, clears heat, harmonizes the viscera, and benefits the water passage,” while fish maw (Colla Piscis) is listed in the *Bencao Gangmu* (Compendium of Materia Medica) as a “superior tonic substance,” noted for its ability to “supplement essence and nourish blood, strengthen the kidneys and consolidate the root.” In modern times, medicinal diet specialists, building upon traditional formulas, have scientifically combined fish maw with Longan (*Dimocarpus longan* Aril) and water duck, rendering the supplementary effects of this medicinal dish more comprehensive and balanced. It has thus become a bright spot on the family health dining table.

Therapeutic Effects of Medicinal Diet

The primary efficacy of stewed duck with fish maw and longan lies in nourishing yin and enriching blood. Fish maw (swim bladder) is an animal-based substance that directly supplies the body with collagen and amino acids, helping to improve conditions such as dry skin and withered hair due to yin-blood deficiency. Longan (Dimocarpus longan) enters the Heart and Spleen meridians (HT, SP) and is adept at benefiting heart blood, calming the spirit, and settling the mind. It effectively alleviates symptoms like palpitations, insomnia, and forgetfulness caused by blood deficiency. Duck (Anas platyrhynchos domestica) nourishes yin and clears heat, balancing the warm and moistening nature of fish maw and longan, ensuring the formula is tonifying without being drying, and nourishing without being greasy.

This medicinal food also has the effects of beautifying the skin and enhancing immunity. The macromolecular collagen in fish maw is easily absorbed after hydrolysis, improving skin elasticity, reducing wrinkle formation, and promoting nail and bone health. Longan (Dimocarpus longan Lour.) is rich in glucose, sucrose, and various vitamins, quickly replenishing physical energy and improving blood deficiency constitution. Water duck (Anas platyrhynchos) is rich in B vitamins and selenium, which helps regulate nervous system function and enhance the body’s antioxidant capacity. The synergy of these three ingredients gives this medicinal food remarkable effects in improving skin texture, delaying aging, and relieving fatigue.

The Role of Traditional Chinese Medicine

Fish Maw (Colla Piscis) — tonifies the kidney and nourishes essence, nourishes the sinews and vessels.

Fish maw (Yu Jiao) is sweet in flavor and neutral in nature, entering the Kidney Meridian (KI) and Liver Meridian (LR). It is a representative food ingredient in Traditional Chinese Medicine following the principle of “treating like with like” (xing bu xing). With its thick, sticky texture and rich collagen content, it tonifies the kidney and replenishes essence, nourishes sinews and vessels. It is specifically indicated for Kidney Deficiency patterns such as soreness and weakness of the lower back and knees, seminal emission, spermatorrhea, and thin, clear vaginal discharge. Moreover, the astringent action of fish maw can also be used to improve hemorrhagic conditions in women, such as metrorrhagia and metrostaxis (beng lou) and persistent postpartum lochia, because it tonifies the Chong and Ren meridians and secures and astringes the uterus.

Longan (Dimocarpus longan) — tonifies the Heart and Spleen, benefits Qi and Blood, calms the Spirit

Longan is classified as a superior herb in *Shennong’s Classic of Materia Medica* (Shennong Bencao Jing), which states: “It governs the five viscera’s pathogenic qi, calms the spirit, and reduces anorexia. Long-term服用 strengthens the ethereal soul, sharpens the mind, lightens the body, and slows aging.” Longan aril (Arillus Longan) is sweet in flavor and warm in nature, entering the Heart (HT) and Spleen (SP) meridians. It tonifies the heart and spleen, nourishes blood, and calms the spirit, making it especially suitable for insomnia with dream-disturbed sleep, dizziness, and poor appetite due to excessive brooding and overstrain damaging the heart and spleen. Its sweet taste also harmonizes other medicinals, enhancing the overall palatability of medicinal diets.

Common Teal (Anas crecca) — nourishes yin and tonifies the stomach, promotes urination to reduce edema.

Water duck is sweet in flavor and cool in nature, and enters the Spleen (Sp), Stomach (St), Lung (Lu), and Kidney (Ki) meridians. Compared to domestic duck, water duck has a stronger Yin-nourishing action and is less likely to cause cloying or impair the Stomach. It can supplement the Middle and boost Qi, nourish Yin and nurture the Stomach, while also promoting urination to reduce edema. For patterns of Yin deficiency with internal heat manifesting as dry mouth and tongue, bone steaming and tidal fever, and scanty dark urine, it provides a clearing and moistening effect. In medicinal cuisine, water duck serves as a carrier for “clear supplementation” (qing bu), capable of bearing the nourishing strength of fish maw and longan, while preventing excessive supplementation from generating heat, thus playing a key role in balancing Yin and Yang.

Indications

Stewed Teal with Fish Maw and Longan is most suitable for individuals with a weakened constitution marked by Yin and Blood Deficiency with Unsettled Shen (Shen Disturbance). Common manifestations include a sallow or pale complexion, dry and lusterless skin, brittle and easily broken nails, dry and split hair, accompanied by palpitations, insomnia with excessive dreaming, poor memory, and difficulty concentrating. This group of people typically develops gradual depletion of Yin and Blood due to prolonged sleep deprivation, excessive mental exertion, or chronic consumptive diseases. Consuming this medicinal food can provide nourishing benefits from the interior outward.

Postpartum and post-surgery recovery individuals are also key target groups for this medicinal food. Women who have experienced excessive blood loss after childbirth, with qi collapse following blood loss (qì suí xuè tuō), often present with signs of deficiency-cold such as insufficient lactation, lower back and back soreness, and aversion to cold. Post-surgery patients, due to blood loss and tissue damage, urgently require high-quality protein and various trace elements for repair. In the stewed duck with fish maw and longan (yú jiāo lóng yǎn dùn shuǐ yā), the collagen and easily absorbed amino acids promote wound healing; the blood-tonifying effect of Longan (Dimocarpus longan Lour.) helps restore complexion; and the yin-nourishing property of duck (Anas platyrhynchos) alleviates the yin deficiency with vexing heat (yīn xū fán rè) often seen after surgery. Additionally, women preparing for pregnancy, women with menopausal syndrome, and adolescents in growth and development stages—if diagnosed with the pattern of yin and blood deficiency (yīn xuè bù zú)—may also consume it in moderation.

Contraindicated Populations

Those with internal exuberance of phlegm-dampness and spleen-stomach deficiency-cold should not take this preparation. Such individuals often present with a heavy sensation of the body, epigastric and abdominal distension and fullness, sticky and unsmooth stools or loose stools, a white, thick, greasy tongue coating, and a sticky mouth without thirst. Fish maw is cloying and greasy in nature; longan (Arillus Longan) is sweet and warm, promoting dampness; and although water duck is cool in nature, it becomes greasy and cloying after stewing. When used together, these ingredients easily augment phlegm-dampness, increase the burden on the spleen and stomach, and lead to discomfort such as abdominal distension, poor appetite, and indigestion. Such individuals should first regulate the spleen and stomach and only consider tonification after the phlegm-dampness has been completely resolved.

Patients with external contraction of excess pathogen and internal accumulated heat should also observe dietary禁忌. If currently in an acute infection phase such as common cold with fever, cough with yellow phlegm, sore throat with swelling, or red and swollen gums, or if suffering from a pattern of blazing heat toxin such as sores, furuncles, or skin abscesses, consuming warming and tonic medicinal food is akin to “adding fuel to the fire,” potentially prolonging the illness and hindering recovery. Additionally, those allergic to fish maw, water duck, or longan must avoid consumption. Patients with hyperuricemia or during an acute gout attack should also use caution or refrain from fish maw due to its high purine content.

Proportions of ingredients in a formula

Fish Maw: 30 g (use dried product; preferably Huajiao Tong or Guang Du variety; soak until soft before use).

Longan Aril (Arillus Longan): 20 g (shelled and pitted, use thick, plump dried longan)

Water duck: 500 g (net weight, select green-headed duck (*Anas platyrhynchos*) or mallard duck approximately 6 months of age, remove skin and excess fat)

Zingiber officinale (Ginger): 15 g (sliced, to remove fishy odor and warm the Middle Jiao)

Red dates (Ziziphus jujuba): 6 pieces (pitted, to enhance sweetness and blood-tonifying effect).

Lycium barbarum (Goji berry, Ningxia origin): 10 g, add during the final 10 minutes of decoction.

Salt: appropriate amount (approx. 2 g, to season before serving)

Pure water: 1500 ml (approximately 2.5 times the volume of the ingredients, yielding 800–1000 ml of soup after simmering)

Preparation Method

Step 1: Pre-treatment of Ingredients

Soak the fish maw in cold water for 8–12 hours in advance, changing the water 1–2 times during the process, until the fish maw becomes completely soft with no hard core. After rehydration, cut it into 3–4 cm segments, then blanch for 1 minute with ginger slices and a small amount of cooking wine to remove any fishy odor. Cut the water duck into 4–5 cm square pieces. Place in a pot with cold water, add 3 slices of fresh ginger and 10 ml of cooking wine. Bring to a boil, skim off the foam, remove the duck pieces, rinse thoroughly with warm water, and drain. Briefly rinse the longan aril (Dimocarpus longan) and red dates (Ziziphus jujuba) with warm water, then remove the pits from the dates.

Step 2: Decoction Procedure

Place the prepared water duck pieces, fish maw segments, longan meat (Dimocarpus longan), red dates (Ziziphus jujuba), and the remaining ginger slices (Zingiber officinale) into a ceramic double-boiler or clay pot, and add 1500 ml of clear water. If using a double-boiler, cover it and seal the edges with aluminum foil to prevent the aroma from escaping; if using a clay pot, close the lid tightly, bring to a boil over high heat, then immediately reduce to low heat and simmer slowly. The stewing time is 2.5 to 3 hours. During this period, try not to open the lid to maintain stable temperature and aroma. 10 minutes before removing from heat, add the washed goji berries (Lycium barbarum), and continue simmering until the time is up.

Step Three: Flavor Adjustment and Finalization

5 minutes before turning off the heat, add an appropriate amount of salt to taste. Be careful not to add too much salt, as it may overpower the natural sweetness of the medicinal meal. Stir well, then continue simmering for another 5 minutes to allow the salt to fully dissolve into the soup. After removing from the heat, strain through a fine-mesh sieve to discard the ginger slices and jujube pits. Ladle into soup bowls and enjoy while hot. If consuming the following day, store the fish maw and water duck separately to prevent the gelatin from solidifying and affecting the texture.

Drinking Tips

1. Frequency and Timing of Administration: This medicinal food is rich, greasy, and heavy in nature. It is recommended to consume 1–2 times per week, with a break of one week after 3–4 consecutive weeks to allow the spleen and stomach sufficient time for transportation and transformation. The optimal times for consumption are on an empty stomach upon waking in the morning or one hour before sleep. Taking it in the morning can quickly replenish yin-blood consumed during the night, while taking it before sleep can harness the spirit-calming effect of Longan (Dimocarpus longan) to promote restful sleep.

2. Seasonal Adaptation: Fish Maw and Longan Stewed with Water Duck is best consumed in autumn and winter, when the body’s yang qi converges inward and the spleen and stomach’s transformative and transport ability is relatively enhanced, making it easier to absorb rich, fatty substances. If needed in spring or summer, the amount of longan can be reduced appropriately to 10 grams, and 5 grams of Ophiopogon japonicus (Mondo Grass) or Polygonatum odoratum (Solomon’s Seal) can be added to balance the warm nature and prevent internal heat.

3. Interactions and Contraindications: If you are taking anticoagulant medications (such as warfarin) or blood-activating and stasis-resolving Chinese herbs (Huoxue Huayu) during the period of taking the medicinal diet, consult a physician before consuming it, as fish maw (colla piscium) contains a certain amount of vitamin K, which may affect the efficacy of the medications. In addition, avoid drinking strong tea or coffee within one hour after consuming this medicinal diet, as tannic acid may combine with gelatin protein to form indigestible precipitates, thereby reducing the nourishing efficiency.