Whole herbsTonifyingEpimedii Folium

Yin Yang Huo (Short-horned Epimedium Herb)

Q: What is Yin Yang Huo? Are curculigo and morinda the same?

Official Yin Yang Huo (淫羊藿) is the dried leaf of Epimedium brevicornu, E. sagittatum, E. pubescens or E. koreanum . The pharmacopoeial name is Epimedii Folium . Curculigo is acrid-hot and toxic: tonifies Kidney yang, strengthens sinews and bones, dispels cold-damp. Morinda is sweet-acrid and slightly warm: tonifies Kidney yang, strengthens sinews and bones, dispels wind-damp. The three cannot be interchanged by equal weight. Write Yin Yang Huo. Yin vacuity with fire is contraindicated.

Q: What are the TCM properties and traditional uses of Yin Yang Huo?

According to the Chinese Pharmacopoeia, Yin Yang Huo is acrid, sweet and warm , enters the Liver and Kidney channels, and acts to tonify Kidney yang, strengthen sinews and bones, and dispel wind-damp . It is used for Kidney yang decline, impotence with seminal emission, flaccid sinews and bones, wind-damp bi pain, and numbness with contracture. Acrid-sweet and warm, it suits Kidney yang vacuity and wind-damp—not yin vacuity with fire, or absence of cold.

Q: What is the usual dosage? Can it be drunk daily as a yang tea?

The pharmacopoeial decoction dose is 6–10 g . It is not a four-season “epimedium yang tea.” Yin vacuity with fire only dries further as it warms. Impotence needs a practitioner to name a short course; it does not replace assessment.

Q: How do you choose and store Yin Yang Huo?

Choose intact leaves, leathery, the lower surface sparsely hairy or nearly hairless, odorless and a slightly bitter taste . Moldy, dirty or leafless lots are discarded. Store ventilated and dry. Buy pharmacopoeial Yin Yang Huo; do not replace tonifying Kidney yang, strengthening sinews and bones and dispelling wind-damp with curculigo or morinda by equal weight.

A practical guide to Yin Yang Huo: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.

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Last reviewed Oct 13, 2026

Quick Facts

Latin Name	Epimedii Folium
Chinese Name & Pinyin	淫羊藿 · Yin Yang Huo
Medicinal Part	Whole herbs
The herb	Yin Yang Huo is the dried leaf of the epimedium species above. Ba Ji Tian and Xian Mao are different official drugs. Common forms: raw and honey-fried.
Nature and channels	Acrid, sweet, warm. Enters the Liver and Kidney. Acrid sweet warmth tonifies Kidney yang, strengthens sinew and bone, and dispels wind-damp.
Pharmacopoeia line	Tonifies Kidney yang. Strengthens sinew and bone. Dispels wind-damp. Used for Kidney yang decline, impotence and seminal emission, wilting sinew and bone, wind-damp bi, and numbness and spasm.
Pattern cues	Impotence. Seminal emission. Wilting sinew and bone. Wind-damp bi. Sore lumbar region and knees. Pale tongue.
In this article	Yin Yang Huo versus Ba Ji Tian, Xian Mao, and Du Zhong. Raw versus honey-fried. Why yin-deficiency fire should skip it. Who should skip it.

What Is Yin Yang Huo?

Yin Yang Huo, also called Xian Ling Pi (仙灵脾; Yín Yáng Huò; Latin: Epimedii Folium; English: epimedium leaf), is the dried leaf of Epimedium brevicornu Maxim., Epimedium sagittatum, Epimedium pubescens, Epimedium wushanense, or Epimedium koreanum. In Chinese medicine it is a yang-tonifying herb. It is acrid, sweet, and warm, enters the Liver and Kidney channels, and its core actions are to tonify Kidney yang, strengthen sinew and bone, and dispel wind-damp. Honey-fried Yin Yang Huo is slightly less warm and dry, and is used more for tonifying the Kidney. The teaching point is impotence from Kidney yang decline, with wilting sinew and bone and wind-damp bi beside it.

It is not Ba Ji Tian. Morinda root is sweet, acrid, and slightly warm. It tonifies Kidney yang, strengthens sinew and bone, and dispels wind-damp, and warms without being very dry. It is not Xian Mao. Curculigo is acrid-hot and toxic. Tonifying Kidney yang is fiercer. A practitioner controls it. Yin Yang Huo is acrid, sweet, and warm. The leaf is the part used, and it also dispels wind-damp. Yin-deficiency fire, and ministerial fire that moves easily, are a poor match. Impotence and wind-damp bi need pattern diagnosis. This is not a sexual-function or testosterone product claim.

It is used most often for three patterns:

Kidney yang decline — impotence, seminal emission; this needs pattern diagnosis
Wilting sinew and bone — wind-damp bi, numbness and spasm
Menopausal hypertension — listed in some sources; seek care

The usual decoction dose is 6–10 g. Acrid, sweet, and warm, it is not a daily “Kidney epimedium” to keep increasing. A dry red tongue and dark urine get hotter if more warmth is added.

When Kidney yang is insufficient, or wind-damp blocks the collaterals, sore lumbar region, impotence, and bi pain are common. Yin Yang Huo is acrid, sweet, and warm. It tonifies, strengthens sinew, and dispels wind-damp, which is why it appears in Kidney-yang warming formulas. It warms and dries more than it clears. Yin-deficiency fire gets drier if more tonification is added.

Yin Yang Huo is not a catch-all Kidney or sinew leaf. In yin-deficiency fire, or when there is no yang deficiency, using it alone can warm, dry, and assist fire. Raw or honey-fried should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Yin Yang Huo: Materia Medica Profile

Identification & Quality Standard

Epimedii Folium

Botanical Origin

The dried aerial portion of Epimedium brevicornum Maxim., Epimedium sagittatum (Sieb.et Zucc.) Maxim., Epimedium pubescens Maxim., Epimedium wushanense T. S.Ying, Epimedium koreanum Nakai.(Beriberidaceae).

Production Regions

Primarily produced in the Chinese provinces of Anhui, Hubei, Shaanxi, Zhejiang.

Quality Requirements

Superior medicinal material has numerous, unbroken, yellowish-green leaves.

Macroscopic Features

Epimedium brevicornum Maxim.: Stem is thin cylindrical, about 20cm long, externally yellowish-green or pale yellow, lustrous. Opposing leaves, biternate compound leaves; leaflets are oval, 3~8cm long, 2~6cm wide; tip is slightly pointed, heart-shaped leaflet grows from the tip; leaflets on both sides have a flat heart shape, the outer side is relatively large, with an ear-like shape; edge has yellow spiny thin saw-teeth; upper surface is yellowish-green, lower surface is grayish-green, 7~9 main veins, base has loose thin and long hairs, two sides of thin vein are raised, obvious reticular veins; leaflet stem is 1~5cm long. Leaf is nearly leathery. faint odor, slightly bitter taste. Epimedium sagittatum (Sieb.et Zucc.) Maxim.: Ternately compound leaf, leaflet is long oval to oval-lanceolate shape, 4~12cm long, 2.5~5cm wide; tip is gradually pointed, leaflet of both sides are obviously sloped, outer side is arrow-shaped. Lower surface loosely covered thick and short downy hair or nearly no hairs. Leaf is leathery. Epimedium pubescen s Maxim.: Lower surface of leaf and leaf stem all covered tuft-like soft hairs. Epimedium wushanense T. S.Ying: Leaflet is lanceolate to narrow lanceolate shape, 9~23cm long, 1.8~4.5cm wide; tip is gradually pointed or gradually long pointed, edge has spiny teeth, side growing leaflet base has sloped lobe, inner side lob is small, round, outer side lobe is large, triangular, gradually pointed. Lower surface covered cotton-like hairs or no hairs. Epimedium koreanum Nakai.: Leaflet is relatively large, 4~10cm long, 3.5~7cm wide, tip is long and pointed. Leaf is relatively thin.

Authentic Regions and Quality Identification

Quality depends heavily on the harvest time, processing, and growing environment.

Top regions (Dao Di): Traditionally, herbs from Sichuan and Shaanxi provinces are highly regarded.
How to spot good quality: Look for intact leaves with a yellowish-green or light brownish-green color. The stems should be thin but tough, with no dirt or impurities. The raw herb is dry, while the processed Zhi Yin Yang Huo has a slightly darker color and a faint oily sheen from the sheep fat.
Common lookalikes: It is sometimes confused with similar plants like Baoxing Epimedium, which has thicker, darker leaves and almost no scent. Authentic Yin Yang Huo (Horny Goat Weed) has a distinct, mild herbal fragrance.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Acrid, Sweet; WarmLiverKidney

1. Historical Records

Classic TCM texts highlight its warming and strengthening benefits:

Shen Nong Ben Cao Jing first recorded its use for issues linked to severe Yang deficiency, such as reproductive weakness and extreme physical fatigue.
Ming Yi Bie Lu noted it could "strengthen bones and tendons," and even mentioned it could be used externally as a wash for certain skin issues.
Ben Cao Gang Mu expanded its use to tonify the lower back and knees, and to boost heart energy.
Note: These historical texts reflect traditional clinical observations, not modern medical diagnoses.

2. Evolution of TCM Understanding

Ancient physicians had nuanced views on how to properly use this herb:

Tonifying focus: Some doctors combined it with other Yang-boosting herbs to treat chronic cold and weakness.
Usage limits: Many emphasized that it is specifically for "cold-deficiency" body types. People with Yin deficiency (who easily get "hot" or inflamed) should avoid it to prevent internal heat flare-ups.
Clearing effects: Early records also noted it helps promote urination, showing that it provides a slight clearing action alongside its warming tonic effects.

Core Efficacies & Traditional Applications

Traditional Functions

Supplements kidney yang, strengthens sinew and bone, and dispels wind-damp. Apply to kidney-yang deficiency with impotence, lumbar weakness, and wind-damp bi.

1. Primary Focus: Warming and Tonifying Yang

The primary traditional function of Yin Yang Huo (Horny Goat Weed) is to gently warm and replenish the body's Yang energy, preventing the coldness and weakness associated with Yang deficiency.

Common signs of Yang deficiency: Frequent chills, cold hands and feet (especially cold lower back and knees), general fatigue, lack of energy, frequent and clear urination, or excessive night urination. Men might experience weakened reproductive function, while women may have cold-related abdominal pain or delayed periods.
Common pairings: It is often combined with other warming herbs like Ba Ji Tian (Morinda Root) or Du Zhong (Eucommia Bark) to enhance the tonifying effect. If the body has excess dampness, it is paired with Fu Ling (Poria) and Bai Zhu (Atractylodes) to help process the moisture and prevent the warming herbs from causing dampness buildup.
Caution: People with "Yin deficiency and hyperactive fire" (characterized by dry mouth, hot palms and soles, and frequent insomnia) should not use this herb on their own, as it can worsen these "heat" symptoms.

2. Secondary Focus: Strengthening Bones and Tendons

Its second core function is to support and maintain the structural health of bones and tendons.

Common indications: Soreness and weakness in the lower back and knees, joint stiffness, or aches that worsen in cold or damp weather. Some may also experience lower limb weakness or a tendency to stumble, which TCM attributes to the Liver and Kidneys failing to nourish the tendons and bones.
Common pairings: It is frequently used with Niu Xi (Achyranthes Root) and Xu Duan (Teasel Root). Niu Xi (Achyranthes Root) directs the healing properties downward to the knees and lower back, while Xu Duan (Teasel Root) nourishes the liver/kidneys and promotes blood flow. If there is a Qi and Blood deficiency, herbs like Huang Qi (Astragalus) and Dang Gui (Angelica Sinensis) are added.
Caution: It is not suitable for self-medication if you have "damp-heat" joint issues (joints that are red, swollen, and hot to the touch) or if you experience dry mouth and a bitter taste.

3. Common Single-Herb Pairings: Synergistic Effects

Yin Yang Huo + Ba Ji Tian (Morinda Root): Both warm the Liver and Kidneys. Yin Yang Huo naturally rises and disperses to warm the limbs, while Ba Ji Tian sinks and stores energy in the lower body. Together, they create a balanced synergy for lower back soreness and cold limbs caused by Yang deficiency.
Yin Yang Huo + Du Zhong (Eucommia Bark): Du Zhong excels at strengthening bones and calming the womb. Paired with Yin Yang Huo, the combination powerfully targets lower back and knee pain, as well as lower limb weakness. Professional TCM guidance is highly recommended for both pairings to ensure proper dosage.

Modern Research

Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.

1. Main Chemical Components

Modern science has identified flavonoids as the primary active compounds in Yin Yang Huo (Horny Goat Weed), such as icariin, along with trace amounts of alkaloids, polysaccharides, and essential oils.

While lab tests show these flavonoids exhibit some cellular activity, we still lack comprehensive human clinical trials to verify these exact effects in people.

2. Modern Pharmacological Focus

Western research on this herb is brief and mostly limited to animal models, focusing on:

Bone metabolism (potential effects on maintaining bone density)
Energy metabolism regulation
Potential neurological effects
Note: These findings cannot directly serve as medical advice or be treated as cures for human diseases.

3. Limitations of Modern Research

When reading about modern studies on this herb, keep a few things in mind:

Lab vs. Life: Results from cell cultures and mice do not automatically translate to human clinical success.
Extracts vs. Whole Herbs: Lab studies often use highly concentrated single extracts (like isolated icariin), which behave very differently from the traditionally brewed whole plant.
Inconsistency: Different studies use varying dosages, plant varieties, and prep methods, making it hard to draw a single conclusion.
Holistic effect: In TCM, the herb's benefits come from all its compounds working together. Isolating a single chemical doesn't capture the true effect of the whole herb.

Comparing Similar Herbs

1. Common Ground with Similar Herbs

When comparing Yin Yang Huo (Horny Goat Weed) with Ba Ji Tian (Morinda Root), they share three main traits:

Both are primary herbs for warming and tonifying Kidney Yang.
Both treat traditional syndromes like lower back soreness and cold extremities caused by Yang deficiency.
Both require careful dosage and are strictly contraindicated for individuals with Yin deficiency (internal heat).

2. Core Differences

Energetic Nature: Yin Yang Huo is warm, spicy, and sweet, with an "ascending and dispersing" nature (moving upward and outward). Ba Ji Tian is also warm but is sweet and spicy with a "descending and consolidating" nature (moving downward and inward).
Therapeutic Focus: Yin Yang Huo focuses on warming the surface and limbs, while strengthening bones and improving reproductive Yang. Ba Ji Tian focuses on warming the lower abdomen (lower Jiao) and deeply relieving rheumatic joint pain.
Target Symptoms: Yin Yang Huo is best for general chilliness, cold limbs, and frequent night urination. Ba Ji Tian is better suited for lower back soreness mixed with rheumatic pain, or female abdominal coldness and severe lower abdominal weakness.

3. One-Sentence Summary

Yin Yang Huo (Horny Goat Weed) excels at moving upward and outward to warm the limbs and surface, whereas Ba Ji Tian (Morinda Root) excels at moving downward to deeply warm the lower body and treat rheumatic pain; they cannot simply replace one another.

Classical Formulas Containing Yin Yang Huo

Formulas vs. Single Herbs

Synergy is Key: A formula is a balanced team. The healing power comes from how the herbs interact, so a single herb cannot simply replicate a full formula's effects.
Holistic Balance: The exact dosage and combination in a formula affect the entire body. Never try to mix or alter these formulas at home based on internet articles.

Diet & Daily Home Use

1. Home Herbal Meals and Teas

Here are two low-risk, mild options for suitable constitutions:

Yin Yang Huo and Goji Berry Tea:
- Ingredients: 3g Zhi Yin Yang Huo (Processed Horny Goat Weed), 5g Goji berries, warm water.
- Method: Steep in boiling water in a covered mug for 10 minutes. Can be refilled until flavorless.
- Best for: People who easily feel cold with mild lower back soreness, especially in autumn and winter (2-3 times a week). Do not use if pregnant, a child, or prone to internal heat.
Yin Yang Huo and Lamb Porridge:
- Ingredients: 5g Zhi Yin Yang Huo (Processed Horny Goat Weed), 30g lamb, 50g rice, 2 slices of ginger, a pinch of salt.
- Method: Put the herb in a cheesecloth bag. Simmer with the diced lamb, ginger, and rice for 30 minutes. Remove the herb bag and add salt.
- Best for: Warming up during cold months (1-2 times a month). Do not eat frequently. Always consult a professional before adding medicinal herbs to your daily diet.

2. Decoction and Processing Differences

Raw vs. Processed: The raw herb is better at dispersing surface cold, while the processed version (Zhi Yin Yang Huo, stir-fried with sheep fat) is much better at warming the lower body and kidneys.
Brewing: For home decoctions, it can be boiled normally with other ingredients. For teas, simply steeping it in boiling water is sufficient. Remember, dietary dosages are much smaller than clinical prescription dosages.

3. Dosage and Usage Cycle

Standard clinical dose: Usually 6-10 grams daily, adjusted by a practitioner.
Dietary dose: Keep it low—about 3 grams for tea, and 5 grams for cooking.
Cycle: Do not use continuously for more than 2 weeks. For long-term care, consult a TCM doctor. Special populations (pregnant/nursing women, children, those with liver/kidney issues) must seek professional advice first.

Contraindications & Safety Warnings

1. Who Should Avoid It

Yin Deficiency / Internal Heat: People who suffer from dry mouth, hot hands/feet, insomnia, or night sweats.
Damp-Heat Body Types: Those with a thick greasy tongue coating, bitter taste in the mouth, or sticky stools.
Pregnant and Nursing Women: Lacks sufficient safety data for self-use.
Children: Their bodies are still developing and should only take herbs under strict medical supervision.
Allergies: Anyone allergic to plants in the Berberidaceae family.

2. Drug Interactions and Dietary Notes

Blood Thinners (Anticoagulants): May affect the efficacy of the medication. Consult your doctor.
Blood Pressure Medications: May enhance the blood-pressure-lowering effect, risking hypotension.
Diabetes Medications: May interfere with blood sugar control.
Sedatives: May increase drowsiness.
Note: Always consult your doctor or pharmacist before mixing this herb with any Western medications.

3. Adverse Reactions and Overdose Risks

Signs of "Heat" (Overuse): Improper use can lead to dry mouth, sore throat, constipation, dizziness, or nausea.
Allergic Reactions: Rashes or itching may occur in sensitive individuals.
Emergency: If you experience severe allergic reactions, continuous vomiting, difficulty breathing, or sudden worsening of symptoms, stop using it immediately and seek emergency medical care.

Frequently Asked Questions About Yin Yang Huo

What is Yin Yang Huo? Are curculigo and morinda the same?

Official Yin Yang Huo (淫羊藿) is the dried leaf of Epimedium brevicornu, E. sagittatum, E. pubescens or E. koreanum. The pharmacopoeial name is Epimedii Folium. Curculigo is acrid-hot and toxic: tonifies Kidney yang, strengthens sinews and bones, dispels cold-damp. Morinda is sweet-acrid and slightly warm: tonifies Kidney yang, strengthens sinews and bones, dispels wind-damp. The three cannot be interchanged by equal weight. Write Yin Yang Huo. Yin vacuity with fire is contraindicated.

What are the TCM properties and traditional uses of Yin Yang Huo?

According to the Chinese Pharmacopoeia, Yin Yang Huo is acrid, sweet and warm, enters the Liver and Kidney channels, and acts to tonify Kidney yang, strengthen sinews and bones, and dispel wind-damp. It is used for Kidney yang decline, impotence with seminal emission, flaccid sinews and bones, wind-damp bi pain, and numbness with contracture. Acrid-sweet and warm, it suits Kidney yang vacuity and wind-damp—not yin vacuity with fire, or absence of cold.

How do you choose raw versus honey-fried leaf? Can curculigo replace it?

Raw leaf is stronger for dispelling wind-damp. Honey-frying leans to tonifying Kidney yang. Curculigo is acrid-hot and toxic; it cannot replace strengthening sinews and bones by equal weight. Commercial epimedium tea is not equal-weight pieces.

What is the usual dosage? Can it be drunk daily as a yang tea?

The pharmacopoeial decoction dose is 6–10 g. It is not a four-season “epimedium yang tea.” Yin vacuity with fire only dries further as it warms. Impotence needs a practitioner to name a short course; it does not replace assessment.

What are the contraindications? Can it be used in pregnancy?

Contraindicated in yin vacuity with easily stirred ministerial fire. Pregnancy needs a practitioner’s assessment. Stop if dry mouth or irritability appears. Impotence and bi pain need medical care.

Can Yin Yang Huo tonify Kidney yang, strengthen sinews and bones, and dispel wind-damp?

It can help Kidney yang decline with impotence and wind-damp bi pain. It joins morinda and curculigo after pattern differentiation. It tonifies Kidney yang, strengthens sinews and bones, and dispels wind-damp—not a specific for every impotence or every bi pain.

Can Yin Yang Huo be drunk daily as a yang, sinew or wind-damp tea?

Kidney yang vacuity may enter a short formula; yin vacuity with fire only dries further as it warms. “Epimedium must tonify yang” does not replace assessment. Tonifying Kidney yang and strengthening sinews and bones should name 6–10 g.

How do you choose among Yin Yang Huo, curculigo, morinda, eucommia and cistanche?

Epimedium is acrid-sweet and warm: tonifies Kidney yang, strengthens sinews and bones, dispels wind-damp—Kidney yang vacuity and wind-damp. Curculigo is acrid-hot and toxic: tonifies Kidney yang, strengthens sinews and bones, dispels cold-damp—yang vacuity with cold-damp. Morinda is sweet-acrid and slightly warm: tonifies Kidney yang, strengthens sinews and bones, dispels wind-damp—Kidney vacuity with wind-damp. Eucommia is sweet-warm: tonifies the Liver and Kidney, strengthens sinews and bones, calms the fetus—Liver-Kidney vacuity with low back pain. Cistanche is sweet-salty and warm: tonifies Kidney yang, benefits essence and Blood, moistens the intestines—Kidney vacuity with essence depletion. Wind-damp favors Yin Yang Huo; cold-damp favors curculigo; Kidney vacuity favors morinda; low back pain favors eucommia; essence depletion favors cistanche. They may be paired after pattern differentiation; yin vacuity with fire forbids large Yin Yang Huo and curculigo.

Which herbs is Yin Yang Huo combined with? What are the representative formulas?

Kidney yang vacuity joins morinda, curculigo and eucommia. Write Yin Yang Huo 6–10 g; do not replace dispelling wind-damp with curculigo by equal weight.

How do you choose and store Yin Yang Huo?

Choose intact leaves, leathery, the lower surface sparsely hairy or nearly hairless, odorless and a slightly bitter taste. Moldy, dirty or leafless lots are discarded. Store ventilated and dry. Buy pharmacopoeial Yin Yang Huo; do not replace tonifying Kidney yang, strengthening sinews and bones and dispelling wind-damp with curculigo or morinda by equal weight.

Related Products

Nong's Yin Yang Huo (Epimedium) Single Herb 5:1 Concentrated Granules $105.82

Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.