Peanut and Astragalus Pig Trotter Soup: TCM Recipe for Qi and Blood

Peanut and Astragalus Pig Trotter Medicinal Soup: An Introduction to Medicinal Diet Therapy

Introduction to Medicinal Diet

Peanut and Astragalus Pig’s Trotter Soup is a classic medicinal dish that combines both flavor and health benefits, originating from the Lingnan folk dietary tradition and refined through generations of physicians. This soup uses pig’s trotter as the main ingredient, paired with pharmaco-alimentary items such as peanut (Arachis hypogaea seed) and astragalus (Astragalus membranaceus root), slow-cooked until the broth turns milky white and rich in gelatin. It serves as a daily nourishing soup and is commonly used for postpartum care or as an adjunct dietary therapy for individuals with constitutional weakness.

The distinctive feature of Peanut and Astragalus Pig Trotters Soup lies in the ingenious combination of Chinese medicinal herbs that tonify qi and secure the exterior with pig trotters rich in collagen, allowing the medicinal properties and flavors to interpenetrate. The red of the peanut skins intertwines with the pale yellow of Astragalus, and the slowly stewed pig trotters become soft, sticky, and springy, while the broth offers a rich, mellow taste with a sweet aftertaste. This soup not only satisfies the palate but also serves to regulate the body, making it especially suitable for consumption in autumn and winter or for individuals with a deficiency constitution prone to fatigue.

Historical Origins and Folk Applications

In many regions of southern China, Peanut and Astragalus Pig Trotter Soup (Arachis hypogaea and Astragalus membranaceus with swine trotters) is regarded as a classic “postpartum restorative soup,” believed to help parturients supplement Qi and Blood (tonify Qi and nourish Blood) and promote lactation (enhance milk secretion). Additionally, for those who frequently stay up late, suffer from mental overexertion (overthinking consuming Heart and Spleen Qi), or are recovering from a serious illness (convalescence from severe disease), this soup can also provide gentle restorative effects. As a result, it has become widely popular, serving as a vivid embodiment of the TCM dietary therapy principles of “like treats like” (correspondence of substances) and “organ to organ” (organ-specific nourishment).

Medicinal Diet Efficacy

The core efficacy of Peanut (Arachis hypogaea), Astragalus membranaceus (Astragalus), and Pig’s Trotters Soup lies in supplementing qi and nourishing blood, nourishing and strengthening the sinews and tendons, moistening the skin, and promoting lactation. Astragalus membranaceus excels at supplementing the qi of the spleen and lung, securing the exterior, and stopping sweating. Peanuts (Arachis hypogaea) strengthen the spleen, nourish the stomach, moisten the lung, and transform phlegm; the peanut skin has the effect of arresting bleeding and supplementing blood. Pig’s trotters are rich in collagen and elastin, which can improve skin elasticity and delay aging. When stewed together, these three ingredients allow qi deficiency to be tonified, blood deficiency to be nourished, and fluid depletion to be moistened.

Specifically, this decoction effectively alleviates sallow complexion, dizziness, fatigue, and soreness of the limbs due to qi and blood deficiency. It also improves postpartum insufficient lactation or thin breast milk, as well as poor appetite and indigestion caused by spleen-stomach deficiency. When taken regularly in appropriate amounts over the long term, it can enhance the body’s immune function and help repair damaged joints and cartilage tissue.

Modern nutritional perspective

From a modern nutritional perspective, the collagen in pig trotters (pig’s feet) is partially hydrolyzed into gelatin during slow cooking, which helps promote skin cell metabolism. Peanuts provide high-quality plant protein, unsaturated fatty acids, as well as vitamin E and B vitamins. Astragalus (Astragalus membranaceus) is rich in active ingredients such as Astragalus polysaccharides and Astragalosides, exerting antioxidant, immunomodulatory, and anti-aging effects. The combination of these three ingredients achieves a complementary advantage of animal and plant nutrition with phytochemicals.

The Role of Traditional Chinese Medicine

According to Traditional Chinese Medicine, Astragalus (Huáng Qí, *Astragalus membranaceus*) is warm in nature with a sweet taste. It enters the Spleen (SP) and Lung (LU) meridians and is known as the “sage herb for tonifying qi.” It greatly tonifies the qi of the Spleen and Lung, raises sunken yang, secures the exterior, and stops sweating. Peanut (Huā Shēng, *Arachis hypogaea*) is neutral in nature with a sweet taste. It enters the Spleen (SP) and Lung (LU) meridians and has the actions of fortifying the Spleen and harmonizing the Stomach, moistening the Lungs and transforming phlegm, regulating qi and promoting lactation. Notably, the peanut skin (peanut coat) has a significant hemostatic effect. Pig’s trotter (Zhū Jiǎo) is neutral in nature with sweet and salty tastes. It enters the Stomach (ST) and Kidney (KI) meridians, tonifies blood and promotes lactation, moistens and smoothens the skin, and strengthens the lower back and knees.

The three ingredients work in synergy to achieve the effect of “supplementing Qi to engender Blood, and nourishing Blood to carry Qi.” Qi is the commander of Blood, and Blood is the mother of Qi. *Astragalus membranaceus* (Astragalus) supplements Qi to promote Blood circulation, *Arachis hypogaea* (Peanut) nourishes Blood while also stopping bleeding, and Pig’s trotters nourish Yin and moisten dryness. Together, they ensure the generation and orderly movement of Qi and Blood. This combination is therapeutically effective for patterns such as dual deficiency of Qi and Blood, Qi failing to contain Blood, and postpartum depletion of Fluids and Blood.

The Wisdom of Classic Herb Pairings

In the formula, the dosage of Huangqi (Astragalus membranaceus) is typically controlled between 15–30 g to harness its qi-supplementing property without causing stagnation. Peanuts are used with their skins intact to enhance the targeted effect of enriching blood and stanching bleeding. For pig’s trotters, the front ones are preferred due to their richer gelatin content. These three ingredients—one for supplementation, one for nourishment, and one for moisturization—not only avoid the potential “heat” issue that may arise from pure qi supplementation but also strengthen the action of replenishing essence and generating marrow. This fully embodies the essence of Chinese medicinal cuisine: “Medicines borrow the power of food, and food reinforces the efficacy of medicines.”

Indications

Those with qi and blood deficiency, presenting with a pale or sallow complexion, dizziness, and mental fatigue, are most suitable—especially urban white-collar workers under high stress and those who frequently stay up late, as well as adolescents in their growth and development phase and middle-aged and elderly individuals with declining constitution. For postpartum women with insufficient lactation or poor milk quality, consuming this soup can promote lactation while aiding uterine involution and physical recovery.

Additionally, individuals with dry skin, premature wrinkles, and impaired joint mobility, as well as those with Lung and Spleen deficiency manifesting as susceptibility to colds, spontaneous sweating, and night sweating, are also suitable candidates for Peanut and Astragalus Pig Trotter Soup (花生黄芪猪脚汤) as a daily therapeutic diet. After surgery or recovery from a serious illness, when healthy qi has not yet been restored and there is depletion of fluids and blood, this soup can help restore healthy qi and accelerate wound healing.

Contraindicated Populations

Excess patterns, heat patterns, dampness exuberance with middle fullness, or unresolved exterior pathogen are contraindications for use. Specific conditions include: wind-heat common cold or wind-cold common cold during the febrile phase, with sore throat, cough productive of yellow phlegm, and a yellow, thick, greasy tongue coating; also those with internal accumulation of damp-heat, characterized by sticky, difficult stools and dark yellow urine. Individuals with internal excess fire or liver yang ascending causing headache and dizziness should likewise avoid use.

Additionally, for patients with severe hyperlipidemia, arteriosclerosis, cholecystitis, or pancreatitis, due to the high fat content of pig trotters in the soup, it should be consumed with caution or after removing the fat, and only in small amounts. It is absolutely contraindicated for those allergic to peanuts. Excessive dosage of Astragalus membranaceus (Astragalus root) may cause abdominal distension or blood pressure fluctuations. For individuals with Spleen and Stomach Deficiency Cold pattern presenting with diarrhea, it is recommended to reduce the dosage of Astragalus and combine it with Zingiber officinale (ginger) to harmonize the Stomach.

Proportions of Ingredients in the Formula

Pig trotters (front preferred) 1 piece, approx. 400-500 g; Raw Astragalus membranaceus (Astragalus root) 20 g, choose those with thick roots, yellow-white cross-section, and sweet taste; Red-skinned peanuts 100 g, select plump, non-moldy ones; Chinese red dates (jujube, Ziziphus jujuba) 6-8 pieces, pitted, approx. 30 g; Fresh ginger (Zingiber officinale) 3-4 slices, approx. 10 g; Salt to taste, approx. 3-5 g; Clean water 2000-2500 ml.

To enhance the blood-tonifying effect, add 5–8 g of Dang Gui (Angelica sinensis); if Yin deficiency is prominent, add 10 g of Mai Dong (Ophiopogon japonicus); if Qi stagnation with abdominal distension is present, add one segment of Chen Pi (Citri Reticulatae Pericarpium). The ratio of peanuts to pig trotters should be approximately 1:4, and the amount of Huang Qi (Astragalus membranaceus) should be controlled between 1/20 and 1/15 of the weight of the pig trotters. Such proportions ensure the medicinal effects are exerted without making the taste too strong and affecting the flavor.

Decoction Method

Step 1: Pig trotter preparation. Singe the pig trotters over a flame to remove residual hair, then soak in cold water for 30 minutes. Scrub thoroughly and cut into evenly sized chunks. Place in a pot of cold water, add cooking wine and a few slices of Zingiber officinale (ginger). Bring to a boil over high heat, skim off any foam, and continue blanching for 3-5 minutes. Remove, rinse with warm water, drain, and set aside.

Step 2: Preparing the peanuts and Astragalus root. Rinse the peanuts thoroughly, then soak them in warm water for 2 hours to allow full absorption, making them easier to soften during simmering. Quickly rinse the Astragalus root (Astragalus membranaceus, Huang Qi) under clean water to remove surface dust, then soak it in warm water for 15 minutes; retain the soaking water to avoid loss of medicinal efficacy.

Step 3: Simmering. Place the blanched pork trotter pieces, soaked peanuts, *Astragalus membranaceus* (Huangqi, milkvetch root) along with its soaking water, red jujube dates (Fructus Jujubae), and fresh ginger into a clay pot or double-boiler. Add sufficient water (enough to fully submerge the ingredients with an extra 3 cm above). Bring to a boil over high heat, then reduce to low heat and simmer for 2.5–3 hours, until the trotters are tender, the peanuts are soft, and the broth becomes thick and milky white.

Step 4: Seasoning and Finishing. 15 minutes before turning off the heat, add 10g of Lycium barbarum (wolfberry, Gouqi) (optional). Finally, season with an appropriate amount of salt according to personal taste, stir well, and continue to simmer for another 5 minutes. Before serving, skim off any excess oil on the surface to make the soup lighter and less greasy. Ladle into bowls and serve hot. The pig trotters can be dipped in a small amount of light soy sauce or vinegar sauce when eating.

Drinking Tips

First, this soup should be consumed warm, ideally 1–2 hours after meals for best results. Avoid taking it on an empty stomach in large amounts, as its cloying nature may obstruct the Stomach (Wei). Each serving: 3–5 pieces of pig trotters (Zhu Jiao) with 200–300 ml of soup, 2–3 times per week. Do not consume continuously for more than 4 weeks; observe the body’s response and adjust accordingly.

Second, please suspend consumption during episodes of common cold with fever, sore throat, or thick, greasy tongue coating; resume only after the external pathogen has been expelled and the spleen and stomach’s transformation and transportation functions have normalized. This decoction may be taken normally alongside qi‑tonifying herbs such as Ren Shen (Panax ginseng) and Dang Shen (Codonopsis pilosula), but concurrent overuse may lead to stagnation of the qi mechanism. It is advisable to stagger the intake times or appropriately reduce the dosage of Huang Qi (Astragalus membranaceus).

Third, note that the peanut skin in the soup has hemostatic effects; women with menorrhagia may consume it with the skin, while those with scanty menstruation or a tendency toward blood stasis are advised to remove the peanut skin before stewing. Additionally, patients with elevated uric acid levels or those in the acute phase of gout should avoid this soup, as pig trotters are high in purines, which may trigger joint pain.