Prinsepia Seed and Beef Liver Soup for Eye Health and Liver Nourishment

Introduction to Medicinal Diet

Prinsepia Seed and Beef Liver Soup is a traditional medicinal dish that blends delicious taste with health benefits. It originated from Lingnan folk dietary remedies and was later systematized and promoted by TCM food therapy experts. Prinsepia seed (dry mature kernel of *Prinsepia uniflora* Batal., shell removed for culinary use) is slightly cold in nature and sweet in flavor. In the *Shennong Bencao Jing* (Divine Farmer’s Materia Medica), it is listed as a top-grade herb, primarily indicated for red, swollen, and painful eyes, blurred vision, and excessive lacrimation. Beef liver is taken from fresh bovine liver (from *Bos taurus* or *Bos indicus*), rich in protein, vitamin A, and various trace elements. Since ancient times, it has been a representative ingredient for the “like replenishes like” (organ–organ) approach. When combined, the soup presents a clear, slightly yellow broth with a rich, mellow flavor and a lingering sweetness. It is smooth, refreshing, and not greasy, making it an excellent seasonal dish for nourishing the Liver in spring and brightening the eyes in autumn and winter.

The concept behind this medicinal diet is rooted in the TCM theory that “the Liver opens to the eyes,” emphasizing improvement of visual function by tonifying Liver blood and clearing Liver heat. *Semen Prinsepiae* (蕤仁肉, Prinsepia seed) enters the Liver Meridian (LR), capable both of dispersing wind-heat to remove nebula and nourishing Liver yin to arrest lacrimation; beef liver (牛肝) directly supplements Liver blood and promotes ocular microcirculation. In combination, one clears while the other tonifies, one disperses while the other nourishes, achieving a balanced effect of “clearing Liver fire without damaging vital qi, and tonifying Liver blood without causing congestion.” Modern nutritional science also confirms that *Semen Prinsepiae* contains active components such as prinsepia glycoside and B vitamins, while beef liver is rich in retinol, iron, zinc and other eye-nourishing nutrients. Their synergy can relieve visual fatigue and improve dark adaptation ability.

Efficacy of Medicinal Diet

The core efficacy of *Prinsepia Seed* (*Prinsepiae Nux*) cooked with beef liver centers on the principle of “nourishing the Liver and brightening the eyes.” For modern individuals who spend prolonged periods facing electronic screens such as computers and mobile phones, regular consumption can significantly alleviate symptoms of visual fatigue, including dry eyes, photophobia with tearing, and blurred vision. When Liver Blood is replenished, the eyes receive nourishment and can see clearly; when Liver Heat is cleared, the eye orifices become unobstructed. Therefore, this recipe serves as an adjunctive treatment for chronic conjunctivitis and early cataracts presenting with patterns of Liver Heat ascending or Liver Blood insufficiency. Furthermore, the high-quality protein and heme iron in beef liver help improve manifestations of Blood deficiency such as sallow complexion, dizziness, and palpitations. The heat-clearing property of *Prinsepia Seed* also aids in reducing “excessive heat” reactions—such as red and painful eyes, bitter taste in the mouth, and dry throat—that often follow staying up late.

From a holistic health perspective, this medicinal food also leverages the principle that the Liver and Kidney share the same origin. Prinsepia Seed (Rui Ren rou) not only nourishes the Liver but also provides a mild astringent effect on essence, while Beef Liver (niu gan) enriches the Blood and assists in transforming essence. Consequently, this formula is beneficial for early-stage Liver and Kidney Deficiency patterns, such as lumbar and knee soreness and weakness, as well as premature graying of hair. In spring, excessive ascending of Liver Qi can predispose to eye disorders; in autumn and winter, the Dryness pathogen often injures Yin, aggravating dry eyes. Taking this formula in moderation throughout all four seasons can serve as a preventive and health-maintaining measure. Notably, the prinsepia glycoside found in Prinsepia Seed (Rui Ren) exhibits mild anti-inflammatory activity. When combined with the zinc content in Beef Liver, it strengthens the immune barrier function of the ocular mucosa, thereby reducing the risk of infectious eye diseases.

Functions of Traditional Chinese Medicine

In the TCM system of nature, flavor, and meridian entry, *Prinsepia uniflora* (Prinsepia kernel) is sweet in flavor and slightly cold in nature, entering the Liver (LR) and Heart (HT) meridians. It excels at dispersing wind-heat, abating nebula and brightening vision, as well as nourishing the liver to stop lacrimation. The *Bencao Shu* (Comprehensive Herbology) records: “It treats eye disorders regardless of deficiency or excess, but must be paired with blood-tonifying herbs as an adjuvant,” forming an excellent combination with ox liver. Ox liver is sweet and neutral, entering the Liver meridian, and is skilled at tonifying the liver and nourishing blood, brightening the eyes and benefiting the orifices. The *Riyong Bencao* (Daily Materia Medica) states: “It brightens the eyes and pacifies liver qi.” When both are decocted together, the medicinal soup uses the qi of water and grains to carry the medicinal potency into the blood aspect of the Liver meridian. This not only clears and drains stagnated heat in the Liver meridian to relieve red eyes and nebula, but also enriches and supplements liver blood deficiency to moisten the eye orifices and stop lacrimation.

Taking a deeper perspective, this medicinal food embodies the TCM principle of “interdependence of ascending and descending (升降相因)” in herb pairing. Prinsepia seed kernel (蕤仁肉, *Prinsepia uniflora*) is light and ascending, specifically targeting the head and eyes to disperse wind-heat pathogens. Ox liver (牛肝), being thick and heavy in quality, supplements the lower burner, specifically addressing Liver blood deficiency. This ascending-descending dynamic allows clear yang to rise through the upper orifices, brightening the eyes, while turbid yin descends through the lower orifices, calming the Liver. It is especially suitable for the complex pattern of Liver blood deficiency with Liver heat—manifestations include dizziness, blurred vision, night blindness (blood deficiency signs) accompanied by excessive eye discharge, distension, and pain (heat signs). This strategy of “simultaneously attacking and supplementing (攻补兼施)” avoids the pitfalls of purely clearing heat (which may damage Liver yang) or solely supplementing blood (which may fuel stagnant heat), making it a classic example of TCM pattern-based diet therapy (辨证施膳).

Target Population

This medicated diet is most suitable for office workers and students who overuse their eyes and suffer from consumption of Liver blood (gan xue hao). For those who use computers or smartphones for more than 8 hours daily and present with declining vision, dry and gritty eyes, frequent blinking, photophobia with preference for dim lighting, continuous consumption for 2–3 weeks can bring marked improvement. Secondly, middle-aged and elderly individuals with gradual decline of Liver and Kidney (gan shen jian shuai), insufficiency of essence and blood (jing xue bu zu) who tend to develop early-stage senile cataract or early macular degeneration (manifesting as blurred vision, epiphora induced by wind, better vision by day than night), can enhance the therapeutic effect by combining this diet with medical treatment. Women with heavy menstruation or postpartum blood loss, who due to Liver blood deficiency (gan xue kui xu) present with pale complexion, brittle and thin nails, dim vision with excessive eye discharge, should also begin taking this diet after menstruation or starting from the third week postpartum.

Additionally, for patients with chronic hepatitis and mild fatty liver presenting with the pattern of liver yin deficiency and deficiency heat internally harassing—manifesting as dull pain in the hypochondrium, dry mouth and eyes, irritability, red tongue with scant coating—this medicinal diet may be consumed once weekly as a dietary therapy. It also provides preventive and alleviating effects for red eyes and visual fatigue caused by chronic sleep deprivation or excessive smoking and alcohol consumption, as well as for chronic conjunctivitis resulting from dry environments (e.g., air-conditioned rooms or windy, sandy areas). For children with pseudomyopia due to liver blood deficiency, a reduced dose may be taken short-term under the guidance of a qualified practitioner.

Contraindicated Populations

For those with excess patterns due to exuberant internal damp-heat, use cautiously or avoid altogether. Specific situations include: the acute stage of conjunctivitis (red-eye disease), presenting with yellow, thick eye discharge, red, swollen, hot, and painful eyelids, and a yellow, greasy tongue coating. In such cases, cow liver is cloying and nourishing, while Prinsepia kernel (Prinsepia uniflora) is slightly cold in nature, which may retain pathogenic factors and obstruct the stomach, instead making the damp-heat difficult to resolve. Secondly, in those with spleen-stomach deficiency-cold and insufficiency of middle yang, manifested as cold pain in the epigastrium, preference for hot drinks, loose stools, and a pale, puffy tongue with teeth marks, cow liver is relatively tonifying and Prinsepia kernel is slightly cold, easily inducing abdominal pain or diarrhea. In these cases, ginger (Zingiber officinale) and tangerine peel (Citri Reticulatae Pericarpium) can be added to the decoction to counteract the cold nature.

Patients with hypercholesterolemia or acute gout attacks should not consume this in large quantities. Beef liver is relatively high in cholesterol (approximately 300–400 mg per 100 g) and contains moderate levels of purines. Therefore, individuals with hyperlipidemia, arteriosclerosis, or gout should limit their intake, or only consume the broth and eat little of the liver under medical supervision. It is contraindicated in those allergic to animal liver. Pregnant women may consume a small amount only if a TCM practitioner has diagnosed Liver Blood deficiency without Internal Heat or Food Stagnation—blind supplementation is not advised. Additionally, individuals taking anticoagulant medications (such as warfarin) should consult their doctor before consuming beef liver, as its high vitamin K content may interfere with the drug’s efficacy.

Food ingredient formulation ratio

Main ingredients: 250 g fresh beef liver (approximately half a liver), 15 g Prinsepia uniflora seed (dried product).

Supporting ingredients: 50 g pork lean meat (to enhance flavor and freshness), 3 slices fresh ginger (about 6 g), 3 pitted red dates (about 10 g), 10 g goji berries (added later).

Seasonings: 10 ml yellow wine, 2–3 g salt (for final seasoning), 0.5 g white pepper (to remove fishy smell and enhance aroma, optional).

Total water volume: It is recommended to use 1500 ml of purified water or mountain spring water. After decoction, approximately 800–1000 ml of soup is obtained, serving 2–3 people.

Preparation method

Step 1: Ingredient Preparation

Soak fresh beef liver in clean water for 30 minutes, changing the water twice during this time to remove blood and any fishy odor. Remove and slice into pieces about 0.5 cm thick, then cut into 3 cm square pieces. Marinate with cooking wine (Shaoxing wine) and a pinch of salt for 10 minutes. Rinse *nux prinsepiae* (蕤仁, kernel of *Prinsepia uniflora*) once with warm water, then soak in clean water for 20 minutes until slightly softened; reserve the soaking water. Cut lean pork into 2 cm square pieces. Place in a pot with cold water, bring to a boil, and cook for 2 minutes. Remove and rinse off any foam. Slice fresh ginger and remove pits from red dates (jujubes). Set aside.

Step 2: Blanching and Adding to the Decoction Pot

Place a clay pot or ceramic casserole on the stove. Pour the pre-soaked Prinsepia seed kernels (Semen Prinsepiae) along with the soaking water into the pot, then add enough additional water to reach 1500 ml (total volume). Bring to a boil over high heat, then reduce to low heat and simmer for 20 minutes to fully extract the medicinal properties of the Prinsepia seeds. Next, add the blanched lean pork pieces, ginger slices, and jujubes (Fructus Ziziphi Jujubae). Continue to simmer over low heat for another 30 minutes. Finally, lay the marinated beef liver slices one by one on the surface of the soup, taking care not to stack them. Bring back to a boil over high heat, then immediately reduce to low heat and simmer for an additional 15 minutes. Sprinkle in the goji berries (Fructus Lycii) 5 minutes before the end of cooking to avoid prolonged boiling, which can cause sourness and spoilage.

Step 3: Flavor Adjustment and Straining the Decoction

Before turning off the heat, remove the ginger slices. Add 2–3 grams of salt for seasoning. If a slight spiciness is preferred, sprinkle 0.5 grams of white pepper powder. Use a fine mesh strainer to skim off any oil and impurities from the soup surface, leaving the broth clear. The ox liver slices can be eaten with the soup; they have a smooth, tender texture like tofu. The pork lean meat and Prinsepia uniflora (Prinsepia kernel) can also be chewed and eaten. The Prinsepia kernel is slightly bitter; if not liked, it can be removed and discarded. The soup is best consumed warm, not stored for long. It is recommended to finish it in 1–2 servings on the same day.

Drinking Tips

1. Optimal Frequency and Time of Administration: It is recommended to take once or twice a week, with a course of three consecutive weeks as one regulation cycle. For best results, take on an empty stomach in the morning or before noon, as this is the time when yang qi is rising, and the qi and blood of the Liver Meridian (LR) are abundant, allowing for more complete absorption of the medicinal effects. Avoid taking too late in the evening, as the rich B vitamins in beef liver may disturb sleep in some individuals.

2. Key points for preparing beef liver: Do not slice the liver too thin (no less than 0.5 cm), otherwise it will easily break into pieces during simmering. Adding yellow wine during marination effectively removes the gamey smell, and do not simmer for more than 20 minutes, otherwise the liver will become tough, dry, and lose nutrients. If sensitive to the gamey odor, you can add a slice of lemon or 2 grams of Sichuan peppercorn when blanching.

3. Compatibility Variations and Seasonal Adjustments: In spring, add 5 g of Chrysanthemum morifolium (Ju Hua) while decocting to enhance the effect of clearing the Liver and brightening the eyes. In autumn, add 10 g of Ophiopogon japonicus (Mai Dong) to moisten the Lung and nourish Yin, as the Lung Metal generates Kidney Water, indirectly benefiting the Liver. During summer, when Dampness-Heat is predominant, reduce the beef liver to 150 g and add 200 g of wax gourd (Dong Gua) while decocting to drain Dampness without damaging Yin. In winter, add 6 g of processed Polygonum multiflorum (Zhi He Shou Wu) to strengthen the actions of tonifying the Liver and Kidney, and benefiting Essence and Blood.

4. Reduced dosage for special populations: For children (7–12 years old), reduce beef liver to 100 g and Prinsepia uniflora (蕤仁肉, Prinsepia seed) to 8 g, shorten the simmering time to 30 minutes, and only take the decoction, discarding the liver. For elderly patients with diminished digestive function, the beef liver can be mashed into a paste before adding to the soup, or alternatively, replace it with quail liver (which is milder in nature), while keeping the dosage of Prinsepia uniflora unchanged.