Herb

Gou Qi Zi

Goji berry | 枸杞子

Also known as:

Chinese wolfberry , Lycii berry

Gou Qi Zi

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Properties

Yin-tonifying herbs (补阴药) · Neutral

Traditionally supports*

Eye Health and Vision Kidney Health Healthy Aging Fertility Immune Support

Parts Used

Fruit (果 guǒ / 果实 guǒ shí)

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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About This Herb

Traditional Chinese Medicine background and properties

Herb Description

Goji berry is one of the most popular herbs in Chinese medicine, prized for nourishing the Liver and Kidneys, supporting healthy vision, and promoting vitality. It is mild and gentle enough for everyday use and is commonly added to teas, soups, and porridges. People often turn to it for tired or dry eyes, lower back soreness, fatigue, and general anti-aging support.

Herb Category

Yin-tonifying herbs (补阴药) Tonifying herbs (补虚药)

Main Actions

  • Nourishes Liver and Kidney Yin
  • Benefits Essence and Fills the Marrow
  • Brightens the Eyes
  • Nourishes Lung Yin
  • Nourishes Blood

How These Actions Work

'Nourishes and tonifies the Liver and Kidneys' refers to Gou Qi Zi's core ability to replenish the Yin and Blood of the Liver and Kidneys. These two organ systems share a common root in TCM ('Liver and Kidney share the same source'), and when their Yin is depleted, a person may experience lower back soreness, weak knees, dizziness, tinnitus, premature greying, or sexual dysfunction such as impotence or nocturnal emissions. Because Gou Qi Zi is neutral in temperature and sweet in taste, it gently nourishes without being too hot or too cold, making it suitable for long-term use. It is one of the few tonic herbs that can support both Yin and Yang to some degree, though its Yin-nourishing action predominates.

'Benefits Essence (Jing)' means this herb helps replenish the body's fundamental reserve substance, which governs growth, reproduction, and aging. This is why Gou Qi Zi appears in many formulas for male and female fertility, premature aging, and general constitutional weakness. Classical texts describe it as helping the body 'generate essence and fill the marrow.'

'Brightens the eyes' is one of the best-known actions of Gou Qi Zi. In TCM, the Liver 'opens into the eyes,' and the Kidneys provide the deep nourishment (Essence) that supports vision. When Liver Blood or Kidney Essence is insufficient, blurred vision, dry eyes, diminished visual acuity, or night blindness may result. Gou Qi Zi addresses the root cause by nourishing both Liver and Kidney. It is very commonly paired with chrysanthemum flower (Ju Hua) for this purpose.

'Enriches Yin and moistens the Lungs' means Gou Qi Zi can address dry, unproductive cough caused by Lung Yin deficiency. This is a secondary action but clinically relevant, especially in chronic conditions where the Kidneys fail to send moisture upward to the Lungs.

'Nourishes Blood' describes the herb's ability to supplement the Blood, particularly Liver Blood, which helps address a sallow complexion, dizziness, and pale lips associated with Blood deficiency.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Gou Qi Zi is traditionally associated with these specific patterns.

The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.

Why Gou Qi Zi addresses this pattern

Gou Qi Zi directly nourishes the Yin of both the Liver and Kidneys, which share a common root. Its sweet taste tonifies and its neutral temperature means it can replenish depleted Yin without generating unwanted Heat or Cold. When Liver and Kidney Yin are deficient, the body loses its moistening, cooling, and anchoring capacity, leading to dizziness, blurred vision, tinnitus, and lower back weakness. By entering the Liver and Kidney channels and enriching Yin and Essence, Gou Qi Zi addresses the core deficiency that drives this pattern.

A practitioner would look for one or more of these signs

Blurry Vision

From Liver Blood and Kidney Essence failing to nourish the eyes

Dizziness

Chronic, mild dizziness from Yin deficiency

Tinnitus

Low-pitched buzzing or ringing from Kidney Yin depletion

Lower Back Pain

Dull, chronic soreness of the lumbar region

Premature Greying Of Hair

Essence and Blood unable to nourish the hair

TCM Properties

Temperature

Neutral

Taste

Sweet (甘 gān)

Channels Entered
Liver Kidneys Lungs
Parts Used

Fruit (果 guǒ / 果实 guǒ shí)

This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page

Product Details

Manufacturing, supplier, and product specifications

Product Type

Granules

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Botanical & Sourcing

Quality Indicators

Good quality Gou Qi Zi berries are spindle-shaped (like a small date pit), 6-20mm long and 3-10mm in diameter. They should be red to dark red in colour with a slight natural lustre. The skin should be soft, pliable, and wrinkled but not brittle or overly sticky. The flesh should be thick and fleshy with relatively few seeds. Top-grade Ningxia berries are notably loose and non-clumping when handled (a distinguishing feature from other regional varieties, which tend to stick together). The taste should be distinctly sweet with a very mild sour note and no bitterness. Avoid berries that are overly bright or unnaturally red (may indicate sulfur fumigation), have a pungent sulfurous smell, or taste sour and astringent (signs of sulfur processing or alum soaking). Berries that feel hard and crystalline on the surface or poke the hand when gripped may have been soaked in alum solution. Quality Ningxia berries, when placed in water, will float initially due to their low density.

Primary Growing Regions

The classic terroir region (dao di yao cai) for Gou Qi Zi is Ningxia province, China, with Zhongning County (中宁县) as the core production area. Zhongning's unique combination of large day-night temperature differences, alkaline sandy soil, and irrigation from the Yellow River mixed with mineral-rich Qingshui River water produces berries of superior quality. Ningxia has cultivated Gou Qi Zi for over 500 years and remains the only region recognised by China's National Medical Products Administration as the official medicinal source. Other major production regions include Qinghai (particularly the Qaidam Basin/Nuomuhong area), Gansu, Xinjiang, Inner Mongolia, and Hebei. While these regions produce large volumes, Ningxia-sourced berries from the Zhongning core area are traditionally considered the highest quality for medicinal use, with higher polysaccharide and protein content.

Harvesting Season

Summer to autumn (June through October), harvested in multiple batches as the berries ripen to bright red. The first harvest ('head crop') is generally considered the highest quality.

Supplier Information

Treasure of the East

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Miscellaneous Info

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Usage & Safety

How to use this herb and important safety information

Important Medical Disclaimer

The information provided here is for educational purposes only and is not intended as medical advice or to replace consultation with a qualified healthcare professional. This herb is a dietary supplement and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease.

Always consult with a qualified healthcare provider, particularly if you are pregnant, nursing, have a medical condition, or are taking other medications. Discontinue use and consult your healthcare provider if you experience any adverse reactions.

Recommended Dosage

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Instructions for safe storage and consumption

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Traditional Dosage Reference

Standard

6-12g

Maximum

Up to 15-20g in decoction for therapeutic purposes. When used as a food supplement (chewed or in porridge), moderate daily amounts of 10-15g are common and well-tolerated. Doses significantly exceeding the pharmacopoeia range (especially in concentrated juice or wine form) should be avoided, particularly by patients on anticoagulant therapy.

Notes

Standard decoction dose of 6-12g is appropriate for most therapeutic purposes including nourishing Liver and Kidney Yin, brightening the eyes, and tonifying Blood. When used primarily for eye health (paired with Ju Hua/chrysanthemum), 6-10g is typical. For more pronounced Kidney Essence and Blood deficiency, doses toward the upper range (10-15g) may be used. As a daily health food (chewed directly, added to porridge, or steeped in tea), 10-15 berries (approximately 5-10g) is a common maintenance amount. The herb can also be soaked in wine for tonic preparations, though the enhanced extraction may increase its potency and potential for drug interactions. Decoction is the standard method, but direct consumption (chewing) is very common since the herb is a recognised food item.

Processing Methods

Processing method

Dry-fried until slightly darkened and fragrant.

How it changes properties

The temperature shifts from neutral to slightly warm, making the herb easier to digest and less likely to cause loose stools. The moistening quality is slightly reduced, decreasing the risk of stagnation in people with weak digestion.

When to use this form

For patients with weak Spleen and Stomach function who need Liver-Kidney tonification but tend toward loose stools or bloating when taking the raw herb.

Toxicity Classification

Non-toxic

Gou Qi Zi is classified as non-toxic in the Chinese Pharmacopoeia and has a very high safety margin. Animal studies determined an LD50 of approximately 83.2 g/kg for the water-soluble extract by injection in mice, indicating extremely low acute toxicity. Its betaine component has an LD50 of approximately 18 g/kg in mice. At normal dietary and decoction doses (6-12g), no toxic effects are expected. However, due to its high sugar content, excessive consumption can produce mild upper digestive discomfort or a sensation of internal Heat (perceived as 'getting hot'). No special processing is required for safe use.

Contraindications

Caution

Active external pathogenic invasion with excess Heat (exterior syndrome with fever). Gou Qi Zi is a tonifying herb and should not be used during acute illness with fever or inflammatory conditions, as nourishing herbs can trap the pathogen inside the body.

Caution

Spleen deficiency with Dampness causing loose stools or diarrhea. Classical sources warn that the herb's moist, nourishing nature can worsen digestive weakness and cause further loose stools. As the Ben Cao Jing Shu states, one should first treat the Spleen and Stomach before using Gou Qi Zi.

Caution

Spleen and Stomach accumulation of cold Phlegm (cold-type digestive stagnation). The Ben Cao Hui Yan specifically cautions against use in patients with cold Phlegm in the digestive system.

Avoid

Concurrent use with warfarin or other anticoagulant medications. Multiple case reports document that Gou Qi Zi (especially in juice or wine form, or in doses exceeding the standard 6-12g range) can significantly potentiate warfarin's anticoagulant effect, leading to dangerously elevated INR values and bleeding.

Caution

Kidney failure or significantly impaired renal function. Gou Qi Zi has a high potassium content, and excessive intake may pose risks for individuals who cannot properly regulate potassium levels.

Special Populations

Pregnancy

Generally considered safe at standard dietary and decoction doses during pregnancy. Gou Qi Zi is a gentle tonifying herb with no known uterine-stimulating, abortifacient, or teratogenic properties. It is included in some classical formulas used during pregnancy for nourishing Liver and Kidney Yin. However, as with any herb during pregnancy, it should be used under guidance from a qualified practitioner and in moderate doses. Excessive consumption may generate internal Heat due to its high sugar content.

Breastfeeding

Gou Qi Zi is generally considered safe during breastfeeding at standard doses. It is a common food-grade herb in China regularly consumed by nursing mothers as part of postpartum dietary therapy. There are no known adverse effects on lactation or transfer of harmful substances through breast milk. Its nourishing properties (tonifying Liver Blood and Kidney Essence) are traditionally considered beneficial during the postpartum period. Use at standard food or decoction doses.

Pediatric Use

Gou Qi Zi is generally suitable for children in appropriately reduced doses, given its mild nature and food-grade safety status. Dosage should be reduced proportionally by age and body weight. For young children (under 6), a few berries daily (2-5g) as food is common practice in China. As a medicinal herb in decoction, children's doses typically range from 3-6g. There are no specific age contraindications, though use in very young infants should be avoided without professional guidance.

Drug Interactions

Warfarin and other anticoagulants: Multiple published case reports document a clinically significant interaction between Gou Qi Zi and warfarin. Patients have presented with markedly elevated INR values and bleeding episodes (nosebleeds, bruising, rectal bleeding) after consuming goji berry tea, juice, or wine while on stable warfarin doses. The proposed mechanism involves inhibition of cytochrome P450 enzymes (particularly CYP2C9) involved in warfarin metabolism. Patients taking warfarin or other vitamin K antagonists should avoid Gou Qi Zi, or if they wish to use it, should do so only under close medical supervision with frequent INR monitoring.

Hypoglycaemic medications: Animal and preliminary human studies suggest Gou Qi Zi may lower blood glucose levels. Patients on insulin or oral hypoglycaemic agents (such as metformin or sulfonylureas) should monitor blood sugar more closely when consuming significant amounts of goji berries, as additive effects could increase the risk of hypoglycaemia.

Antihypertensive medications: Although the clinical evidence is limited, some research suggests goji berries may have mild blood pressure-lowering effects. Patients on antihypertensive drugs should be aware of potential additive hypotensive effects.

Dietary Advice

Gou Qi Zi is a warming, nourishing herb best supported by a diet that includes other Blood- and Yin-nourishing foods such as dark leafy greens, black sesame, walnuts, and bone broth. Avoid excessive cold, raw foods when taking Gou Qi Zi for Kidney and Liver tonification, as these can impair the Spleen's ability to absorb the herb's benefits. Limit greasy, heavy foods that produce Dampness, particularly if using the herb to address digestive weakness alongside deficiency. Avoid excessive alcohol, which generates Heat and may counteract the herb's gentle nourishing properties (though small amounts of medicinal wine with goji are a traditional preparation).

Cautions & Warnings

Although this herb is typically safe for most individuals, it may cause side effects in some people. Pregnant women, nursing mothers, postpartum women, and those with liver disease should use the formula with caution.

As with any Chinese herbal remedy, it is advisable to seek guidance from a qualified TCM practitioner before beginning treatment.