Traditional Chinese Medicinal Soup: Pig Tail with Dipsacus & Eucommia

Introduction to Medicinal Diet

Dipsacus and Eucommia Bark Stewed Pig Tail is a classic nourishing soup originating from Lingnan traditional medicinal cuisine. This formula features Dipsacus Root (Dipsaci Radix) and Eucommia Bark (Eucommiae Cortex), two herbs that tonify the kidneys and strengthen bones and sinews, slow-cooked with pig tail to produce a milky-white broth where herbal and meat aromas blend harmoniously, yielding a rich yet non-greasy taste. In folk medicine, it is commonly used as a dietary therapy for soreness and weakness of the lower back and knees, as well as weakness of the sinews and bones. It is especially suitable for middle-aged and elderly individuals, as well as women during the postpartum recovery period. The name of the medicinal dish “Xuduan” (Dipsacus) symbolizes “mending the broken sinews and bones,” while “Duzhong” (Eucommia) originates from an ancient legend of a Taoist priest named Du Zhong, who consumed this herb regularly and became light-bodied and vigorous. The combination of these two herbs complements each other perfectly.

Pig tail is naturally rich in gelatin and calcium. After slow cooking, the collagen dissolved into the soup works synergistically with the active medicinal components, enhancing the body’s absorption. Preparation requires only a few simple adjuncts such as Shengjiang (Zingiber officinale, ginger) and Hongzao (Ziziphus jujuba, jujube), which can stimulate the medicinal properties while eliminating any gamey odor. This medicinal diet has been validated by generations of physicians and is recorded in numerous classic texts of TCM food therapy—for instance, the *Shi Liao Ben Cao* (Materia Medica for Dietary Therapy) contains similar descriptions. It is truly regarded as “an excellent soup formula for sinew and bone overstrain.”

Historical Origins and Folk Applications

The prototype of Dipsaci Radix (Himalayan Teasel Root) and Eucommiae Cortex (Eucommia Bark) Braised Pig Tail can be traced back to the “Lumbar Kidney Decoction” in Tang dynasty’s *Essential Prescriptions Worth a Thousand Gold for Emergencies*, and later evolved from the “Qing’e Pill” (Green Youth Pill) in Song dynasty’s *Prescriptions of the Bureau of Taiping People’s Welfare Pharmacy*. During the Ming and Qing dynasties, Lingnan physicians added pig tail as a guiding ingredient, making it more suitable for the constitutional characteristics of “Kidney Deficiency with Dampness” under the damp-heat climate of the southern region. To this day, many families in Guangdong still prepare this soup during autumn and winter to prevent or alleviate soreness and pain in the lower back and legs caused by overwork or aging.

Efficacy of Medicated Diet

Overall, stewed pig tail with Dipsacus asperoides (Xu Duan) and Eucommia ulmoides (Du Zhong) has significant effects of tonifying the liver and kidney, strengthening sinews and bones, and healing fractures to stop pain. Regular consumption can improve symptoms such as soreness and coldness in the lower back and knees, flaccidity of sinews and bones, and weakness in walking. It also provides supportive regulation during the recovery stage of chronic lumbar muscle strain and lumbar disc herniation. Additionally, the collagen in the pig tail helps to moisten the joints and increase bone flexibility, while the herbs’ function of invigorating blood and unblocking collaterals promotes local blood circulation and relieves stiffness.

From a nutritional perspective, this medicinal food also provides high-quality protein and minerals such as calcium and phosphorus, which supports the prevention of osteoporosis. For women with postpartum Qi and Blood Deficiency accompanied by a bearing-down sensation in the lower back and abdomen, moderate consumption of this soup can promote uterine recovery and reduce postpartum lower back pain. For men with premature aging, hair loss, and frequent nocturia due to Kidney Essence Deficiency, this soup can serve as a dietary therapy for regulation and nourishment.

Multi-dimensional health benefits

In addition to the core effects mentioned above, this medicinal food also helps boost immunity: the pinoresinol diglucoside from *Eucommia ulmoides* (Du Zhong / Eucommia bark) exerts a blood pressure-regulating action, while the saponins in *Dipsacus asperoides* (Xu Duan / Dipsacus root) provide anti-inflammatory and decongestant effects. The niacin abundant in pig tail improves rough skin. Therefore, it serves both as a medicinal supplement and a nourishing food, gentle and safe.

Actions of Traditional Chinese Medicine

According to TCM theory, the waist is the residence of the kidney, and the knee is the residence of the sinews. Dipsacus (Radix Dipsaci, Teasel root), with bitter and pungent taste, slightly warm nature, enters the Liver and Kidney meridians, excels in tonifying the liver and kidney, mending sinews and bones, and regulating blood vessels. It is an important herb for treating lower back pain and traumatic injuries. Eucommia (Cortex Eucommiae, Eucommia bark), with sweet taste, warm nature, specifically enters the Liver and Kidney meridians, can tonify the liver and kidney, strengthen sinews and bones, calm the fetus, and has a calming and descending effect on dizziness and hypertension caused by kidney deficiency. When used together, one mends and the other strengthens, synergistically enhancing efficacy.

In TCM diet therapy, pig tail is regarded as a “substance of flesh and blood with affinity” and follows the principle of “like nourishes like.” It has a neutral nature, enters the Kidney Meridian, and can tonify kidney marrow and boost essence and blood. Ginger warms the middle and dissipates cold; Chinese red dates (jujube) tonify qi and nourish blood. The overall medicinal diet is warm-moist in nature, capable of warming and supplementing kidney yang without being drying, and nourishing kidney yin without being greasy. It has regulatory and therapeutic effects on patterns such as kidney yang deficiency (aversion to cold, cold limbs, cold pain in the lower back and knees), kidney essence insufficiency (dizziness, tinnitus, loose teeth, hair loss), and qi stagnation with blood stasis (stabbing pain in the lumbar spine, difficulty in turning or side-to-side movement).

Analysis of Sovereign-Minister-Assistant-Envoy Compatibility

In this formula, *Eucommia ulmoides* Oliv. (Eucommia bark) serves as the sovereign herb, sweet and warm in nature, directly entering the Kidney Meridian (KI). *Dipsacus asper* Wall. ex C.B. Clarke (Himalayan teasel root) acts as the minister herb, assisting the sovereign to strengthen sinews and bones while also promoting blood circulation. Pig tail (Cauda Suilla) functions as the assistant herb, guiding the medicinals into the Kidney and supplementing essence and blood. Fresh *Zingiber officinale* Roscoe (ginger) and *Ziziphus jujuba* Mill. (red date) act as the envoy herbs, harmonizing the medicinal actions and protecting the Spleen and Stomach. These four components work together: they tonify without causing stagnation, and warm without inducing dryness.

Target Population

1. Middle-aged and elderly individuals experiencing gradual decline of Kidney Qi, with manifestations such as soreness and weakness in the lower back and knees, difficulty climbing stairs, and increased nocturia—consuming this 2–3 times per week can provide significant relief. 2. Sub-health population including those with long-term sedentary office work or physical labor leading to chronic lumbar muscle strain and spinal fatigue. 3. Women with body weakness after childbirth or miscarriage, accompanied by bearing-down pain in the lower back and persistent lochia (should be consumed only after lochia has completely discharged). 4. Adolescents during their growth and development phase who suffer from weakness in the lower back and knees, affecting athletic performance—can be used as a supplementary soup to support height increase and bone strengthening. 5. Patients in the post-fracture surgery recovery period, to be consumed under medical guidance, as it can promote callus formation.

Additionally, for mild hypertension accompanied by Kidney Deficiency symptoms (such as dizziness and lumbar soreness), the antihypertensive effect of Eucommia bark (Eucommia ulmoides) makes this soup a viable dietary therapy option. However, those with fluctuating blood pressure should reduce the dosage under the guidance of a physician.

Contraindicated populations

1. For those with Yin deficiency and effulgent fire, presenting as hot palms and soles, dry mouth and throat, night sweats, red tongue with scant coating: avoid the warm and tonic nature of *Eucommia ulmoides* (Eucommia bark) and *Dipsacus asper* (Dipsacus root), as they may aggravate fire and damage yin. 2. For patients with excess heat pattern, such as common cold with fever, sore throat, cough with yellow phlegm, dry stools, etc.: tonification is not advisable when internal excess heat is present. 3. For pregnant women: Although *Eucommia ulmoides* (Eucommia bark) has the effect of preventing miscarriage, *Dipsacus asper* (Dipsacus root) is suspected of activating blood and moving blood, and pig tail is slightly lubricating in nature; do not consume without differential diagnosis by a physician. 4. For those with damp-heat constitution: typically presenting with yellow greasy tongue coating, bitter taste and foul breath, yellow urine, or damp scrotum. Taking this may aggravate dampness stagnation. Instead, use herbs that resolve dampness such as *Coix lacryma-jobi var. ma-yuen* (Coix seed) and *Poria cocos* (Poria). 5. For those allergic to the above medicinal herbs or food ingredients.

In addition, patients with severe renal insufficiency (such as uremia) need to limit protein intake and should not consume excessive amounts of pork tail soup; patients with hyperuricemia or during an acute gout attack should avoid drinking meat broth due to its high purine content.

Ratio of ingredients in a formula

Pig tail: 1 piece (about 300-400 g). It is recommended to choose pig tail with skin, retaining the skin and bone marrow.

Dipsacus (Dipsacus asper, Chinese Teasel): 15 g (dried), preferably from specimens with thick strips, soft texture, and a yellowish-white cross-section.

Eucommia ulmoides (Eucommia bark): 15 g (dried). It is advisable to select peeled, cut into chunks or slices. It can be pre-stir-fried until slightly charred to enhance its efficacy.

Ginger (Zingiber officinale): 5 slices (about 10 g), mature ginger is preferred.

Fructus Jujubae (Red Jujube): 4-5 pieces (pitted), approximately 15-20 grams.

Salt: appropriate amount (about 2-3 grams, season before removing from heat).

Water: approximately 1500–2000 ml (reduce the decoction to 800–1000 ml).

Note: If you prefer a stronger medicinal flavor, wrap the Dipsacus asper (Teasel root) and Eucommia ulmoides (Eucommia bark) in a gauze bag for easy removal.

Preparation Method

Step 1: Prepare the ingredients. Cut the pig tail into 3–4 cm sections. Place in cold water in a pot, add 2 slices of fresh ginger and a splash of cooking wine. Bring to a boil, skim off any foam, then remove and rinse thoroughly with warm water. This step removes any gamey odor and residual blood.

Step 2: Soak the herbs. Rinse Dipsaci Radix (Himalayan Teasel) and Eucommiae Cortex (Eucommia bark) briefly with clean water, then soak them in warm water for 15 minutes to facilitate the extraction of active constituents. Soak Jujubae Fructus (Chinese dates) for 5 minutes, remove pits, and set aside.

Step 3: Simmering. Place the prepared pig tail, Dipsacus asper (Teasel root), Eucommia ulmoides (Eucommia bark), Ziziphus jujuba (Red dates/jujubes), and the remaining 3 slices of Zingiber officinale (Ginger) together in a clay pot or ceramic pot. Add sufficient clean water (about 1500–2000 ml). Bring to a boil over high heat, then reduce to low heat, cover, and simmer gently for 2 hours. You may open the lid and stir once during this time to prevent sticking to the bottom.

Step 4: Seasoning and reducing the broth. Once the soup turns milky white and the pig tails become tender enough to fall off the bone, use a fine-mesh strainer to remove the herb residue (or you may keep the herbs in the soup for direct consumption, though the texture will be slightly coarse). Add an appropriate amount of salt and stir well. Continue to simmer on low heat for another 5 minutes, then turn off the heat.

Step Five: Serve and Enjoy. Ladle the soup and pig tail into serving bowls; garnish with a sprinkle of chopped scallions or Lycium barbarum (goji berries) if desired. It is recommended to finish within 2–3 portions, and for best flavor, consume on the same day it is prepared.

Consumption Tips

1. Take while hot: Medicinal food should be consumed warm, as its efficacy and taste diminish once cooled, and it is prone to developing a fishy odor. If not finished in one sitting, it can be sealed and refrigerated, then reheated the next day before consumption. However, avoid repeatedly boiling it.

2. Persistence in Dietary Therapy: Consistency is key in dietary therapy. It is recommended to consume for 3–5 consecutive days as one cycle, then pause for 2 days before resuming. For daily health maintenance, 2–3 times per week is sufficient. Avoid overconsumption to prevent cloying and impairing the stomach.

3. Compatible exercise: During the period of taking this decoction, moderate lower back stretching exercises (such as “Flying Swallow” posture and five-point support) can accelerate the movement of qi and blood, thereby doubling the medicinal effect with half the effort. However, avoid vigorous bending or heavy lifting.

4. Pay attention to herb quality: Dipsacus asper (Dipsacus root) and Eucommia ulmoides (Eucommia bark) are best when sourced as geo-authentic herbs. Dipsacus root from Hubei and Sichuan is considered superior; Eucommia bark from Sichuan and Guizhou is regarded as top grade. When purchasing, observe the cross-section for silvery-white rubber filaments (the distinguishing feature of Eucommia bark); if absent, it is counterfeit.

5. Reduced dosage for children: For children under 12 years old, it is recommended to halve the herbal dosage (Dipsacus asper [Himalayan teasel] and Eucommia ulmoides [Eucommia bark] 7-8 grams each), keep the amount of pig tail unchanged, and reduce the simmering time to 1.5 hours to avoid overly strong medicinal effects.