Herb Pollen (花粉 huā fěn)

Pu Huang

Cattail pollen · 蒲黄

Typha angustifolia L. · Pollen Typhae

Pu Huang (Cattail pollen) plant

Images shown are for educational purposes only

Cattail pollen is a gentle but versatile herb best known for its dual ability to stop bleeding and dissolve blood clots at the same time. This means it can address bleeding problems without causing further complications from trapped old blood. It is commonly used for painful periods, postpartum pain, blood in the urine, and various types of internal bleeding.

Category Hemostatic herbs (止血药) Herbs that transform stasis and stop bleeding (化瘀止血药)
Therapeutic focus Menstrual Health Pain Management Urinary Health Cardiovascular Health

TCM Properties

Temperature

Neutral

Taste

Sweet (甘 gān)

Channels entered

Liver, Pericardium

Parts used

Pollen (花粉 huā fěn)

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Educational content • Consult qualified TCM practitioners for diagnosis and treatment

What This Herb Does

Every herb has a specific set of actions — here's what Pu Huang does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Pu Huang is primarily used to support these areas of health:

Menstrual Health Pain Management Urinary Health Cardiovascular Health

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Pu Huang performs to restore balance in the body:

Stops Bleeding Invigorates Blood and Dispels Stasis Promotes Urination and Relieves Stranguria

How these actions work

'Stops bleeding' means Pu Huang can help control various types of bleeding, including nosebleeds, vomiting blood, coughing blood, blood in the urine, heavy menstrual bleeding (崩漏 bēng lòu), and traumatic bleeding. Unlike some hemostatic herbs that simply constrict vessels, Pu Huang's special quality is that it stops bleeding without trapping old, stagnant blood inside the body. When charcoal-processed (蒲黄炭 Pú Huáng Tàn), this hemostatic action becomes significantly stronger and is preferred for acute bleeding without obvious stagnation.

'Resolves blood stasis' means Pu Huang can break up and move blood that has become stuck or stagnant. This is why it is used for sharp, stabbing pain in the chest or abdomen, painful periods, and postpartum abdominal pain caused by retained old blood. This action is strongest in the raw (生 shēng) form. It enters the Liver and Pericardium channels, which are closely connected to blood storage and blood circulation. The classical pairing with Wu Ling Zhi (flying squirrel feces) in the formula Shi Xiao San is the most famous application of this action.

'Promotes urination and frees strangury' means Pu Huang can help relieve painful, difficult, or bloody urination (a condition TCM calls 'blood strangury' or 血淋 xuè lín). By clearing stasis from the Bladder area and promoting urine flow, it addresses urinary tract conditions where blood appears in the urine alongside burning pain and urgency.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Pu Huang is used to help correct these specific patterns.

Why Pu Huang addresses this pattern

Pu Huang's sweet taste and neutral temperature allow it to gently enter the Liver and Pericardium channels, the two channels most closely tied to blood storage and circulation. Its core action of resolving blood stasis (化瘀) directly addresses the blocked blood flow that defines this pattern. When blood stagnates, it causes sharp, fixed, stabbing pain, and Pu Huang's ability to both invigorate blood movement and disperse accumulated stasis makes it particularly well-suited. Unlike warmer or harsher blood-movers, Pu Huang's neutral nature means it can be used whether the underlying stasis leans slightly warm or cold, making it flexible across a range of blood stasis presentations.

A practitioner would look for one or more of these signs

Amenorrhea

Painful periods with dark, clotted menstrual blood

Chest Pain

Sharp, stabbing chest or abdominal pain with fixed location

Prostate Disorders

Postpartum abdominal pain from retained lochia

Commonly Used For

These are conditions where Pu Huang is frequently used — but only when they arise from the specific patterns it addresses, not in all cases

Arises from: Blood Stasis

TCM Interpretation

TCM understands painful periods primarily through the principle 'where there is no free flow, there is pain' (不通则痛). When blood in the uterus and its connecting channels (the Chong and Ren vessels) becomes stagnant, it blocks the smooth flow of menstruation. This stagnation can arise from cold constricting the vessels, emotional stress causing Liver Qi to stagnate and impede blood flow, or simply from constitutional weakness. The key diagnostic signs that point to blood stasis as the cause include sharp or stabbing (rather than dull) pain, dark-colored menstrual blood with clots, and pain that improves once clots are passed.

Why Pu Huang Helps

Pu Huang enters the Liver and Pericardium channels, which directly connect to blood storage and circulation in the uterus. Its stasis-resolving action (化瘀) breaks up the clotted, stagnant blood causing the pain, while its gentle hemostatic property prevents excessive bleeding. The classic pairing with Wu Ling Zhi in Shi Xiao San is one of the most commonly prescribed combinations for this condition. Modern research has confirmed that Pu Huang can promote uterine contractions, helping to expel stagnant material and reduce pain. Its neutral temperature makes it appropriate whether the underlying cause leans warm or cold.

Also commonly used for

Postmenstrual Bleeding

Charcoal-processed form preferred for pure bleeding

Prostate Disorders

Retained lochia and postpartum abdominal pain

Gastritis

Chronic gastritis with blood stasis pattern

Nosebleeds

Various types of epistaxis

Urinary Tract Infection

With hematuria and strangury symptoms

Hyperlipidemia

Modern pharmacological application for lipid-lowering

Endometriosis

Blood stasis in the lower abdomen with pain

Herb Properties

Every herb has an inherent temperature, taste, and affinity for specific channels — these properties determine how it interacts with the body

Temperature

Neutral

Taste

Sweet (甘 gān)

Channels Entered

Liver Pericardium

Parts Used

Pollen (花粉 huā fěn)

Dosage & Preparation

These are general dosage guidelines for Pu Huang — always follow your practitioner's recommendation, as dosages vary based on the formula and your individual condition

Standard dosage

5-10g

Maximum dosage

Up to 30g per day has been used in clinical studies for lipid-lowering purposes, in divided doses and under practitioner supervision.

Dosage notes

The standard decoction dose is 5-10g. Raw Pu Huang (Sheng Pu Huang) is preferred when the goal is to invigorate Blood, dispel stasis, and relieve pain, or to promote urination for blood-strangury. Charred Pu Huang (Pu Huang Tan) is used when the primary goal is to stop bleeding, as charring enhances its astringent, hemostatic effect. However, modern clinical experience suggests that raw Pu Huang also possesses significant hemostatic activity. For external application to wounds or mouth ulcers, the powder is applied directly in appropriate amounts. When taken as a powder dissolved in liquid (rather than decocted), lower doses of 1.5-3g per dose are typical.

Preparation

Pu Huang must be wrapped in cloth (包煎, bao jian) when decocted. Because it is an extremely fine, lightweight powder, it will float on the surface and cannot be strained properly without wrapping. Failure to wrap it results in a cloudy, difficult-to-strain decoction and significant loss of material. For hemostatic purposes, it may also be taken directly as a fine powder mixed into warm water or wine (1.5-3g per dose), rather than decocted.

Processing Methods

In TCM, the same herb can be prepared in different ways to change its effects — here's how processing alters what Pu Huang does

Processing method

The raw pollen is stir-fried over high heat until it turns dark brown to black (charcoal-processing), then a small amount of clean water is sprinkled on to stop the burning. The pollen must retain some of its original properties ('cún xìng' 存性) and not be fully incinerated. The product is then cooled thoroughly for 1 to 2 days before storage, as it reignites easily.

How it changes properties

Charcoal processing significantly increases the astringent, hemostatic (止血) action. The raw form's blood-invigorating and stasis-dispersing properties are weakened, while the ability to stop bleeding becomes dominant. The temperature remains neutral, but the overall effect shifts from moving blood to holding blood.

When to use this form

Preferred for acute bleeding conditions where there is little or no underlying blood stasis, such as heavy uterine bleeding (崩漏), vomiting blood, nosebleeds, or blood in the stool. When the priority is to stop bleeding quickly rather than address stagnation, charcoal-processed Pu Huang is the better choice.

Common Herb Pairs

These ingredients are traditionally combined with Pu Huang for enhanced therapeutic effect

Wu Ling Zhi
Wu Ling Zhi 1:1 (equal parts, typically 6g each)

This is the most famous herb pair involving Pu Huang and forms the complete formula Shi Xiao San (Sudden Smile Powder). Together they create a powerful blood-stasis-resolving and pain-stopping combination. Pu Huang invigorates blood and resolves stasis while also having hemostatic properties. Wu Ling Zhi specializes in unblocking the blood vessels and stopping pain. The two herbs reinforce each other (相须 xiāng xū), producing a combined effect that is far stronger than either herb alone.

When to use: Sharp, stabbing pain in the chest, abdomen, or lower belly caused by blood stasis. Classic indications include dysmenorrhea with clots, postpartum abdominal pain from retained lochia, epigastric pain, and angina pectoris.

Yu Jin
Yu Jin 2:3 (Pu Huang 6g : Yu Jin 9g)

Pu Huang resolves blood stasis and stops bleeding while Yu Jin (Turmeric tuber) invigorates blood, moves Qi, and clears heat from the blood. Together they address hematuria by both stopping the bleeding and clearing the underlying heat and stasis. The classical formula Pu Huang San from the Sheng Ji Zong Lu pairs these two herbs specifically for bloody urine.

When to use: Blood in the urine (hematuria) from Bladder heat, especially when accompanied by painful or difficult urination.

Dang Gui
Dang Gui 1:1 (Pu Huang 9g : Dang Gui 9g)

Pu Huang resolves stasis and stops bleeding while Dang Gui (Chinese Angelica root) nourishes and invigorates blood. Together they address situations where blood loss has occurred alongside stasis. Dang Gui's blood-nourishing quality prevents the stasis-resolving herbs from depleting the blood further, and its warming nature supports circulation.

When to use: Menstrual disorders involving both blood deficiency and blood stasis, postpartum conditions where the patient is weak but still has retained stagnant blood that needs clearing.

Long Gu
Long Gu 6:5 (Pu Huang 90g : Long Gu 75g in classical Pu Huang Wan)

Charcoal-processed Pu Huang stops bleeding while Long Gu (Dragon bone / fossilized bone) astringes and consolidates. Together they powerfully arrest heavy or prolonged bleeding. The classical Pu Huang Wan from the Sheng Ji Zong Lu combines these two with Ai Ye for excessive menstrual bleeding.

When to use: Heavy, prolonged menstrual bleeding (崩漏) or chronic blood loss conditions where astringency and hemostasis are both needed. Uses the charcoal-processed form of Pu Huang.

Key Formulas

These well-known formulas feature Pu Huang in a prominent role

Shi Xiao San 失笑散 King

Shi Xiao San (Sudden Smile Powder) is the definitive showcase of Pu Huang's blood-stasis-resolving and pain-stopping actions. Consisting of just Pu Huang and Wu Ling Zhi in equal parts, this formula from the Tai Ping Hui Min He Ji Ju Fang demonstrates that Pu Huang's ability to invigorate blood and disperse stasis can, by itself, produce dramatic pain relief. The formula is used for all types of sharp, stabbing pain from blood stasis, including dysmenorrhea, postpartum pain, epigastric pain, and angina.

Shao Fu Zhu Yu Tang 少腹逐瘀汤 Deputy

In Wang Qingren's Shao Fu Zhu Yu Tang (Drive Out Blood Stasis from the Lower Abdomen Decoction), Pu Huang works alongside Wu Ling Zhi (as an embedded Shi Xiao San pair) within a larger formula that adds warming herbs to address cold-stasis in the lower abdomen. Pu Huang serves as Deputy, contributing its stasis-resolving and hemostatic actions to treat menstrual disorders, lower abdominal masses, and infertility from blood stasis with cold.

Xiao Ji Yin Zi 小蓟饮子 Assistant

In Xiao Ji Yin Zi (Minor Thistle Decoction), Pu Huang serves as an Assistant herb that contributes both hemostatic and stasis-resolving actions to treat blood strangury and hematuria from lower-burner heat. This formula showcases Pu Huang's unique strangury-freeing (通淋) action, stopping urinary bleeding while preventing stasis from forming where blood has leaked into the urinary tract.

Comparable Ingredients

These ingredients have overlapping uses — here's how to tell them apart

San Qi
Pu Huang vs San Qi

Both San Qi (Notoginseng) and Pu Huang are classified as blood-stasis-resolving hemostatic herbs, meaning they stop bleeding without trapping old blood. However, San Qi is significantly stronger in both hemostatic and stasis-resolving power and is considered the premier herb for bleeding and trauma. San Qi also excels at relieving pain from physical injury (making it the leading trauma herb), while Pu Huang is gentler and better suited for gynecological bleeding, menstrual pain, and urinary bleeding (blood strangury). San Qi is warm, while Pu Huang is neutral, making Pu Huang more versatile across hot and cold patterns.

Qian Cao
Pu Huang vs Qian Cao

Both resolve stasis and stop bleeding. However, Qian Cao (Madder root) is bitter and cold, giving it a distinct cooling and blood-cooling action that makes it especially suited for blood-heat patterns with stasis. Qian Cao also activates the channels and treats painful menstrual blockage (通经). Pu Huang, being neutral, is more flexible across temperature patterns and additionally promotes urination to treat blood strangury, an action Qian Cao lacks.

Xu
Pu Huang vs Xue Yu Tan

Both stop bleeding and resolve stasis. However, Xue Yu Tan (Charred human hair) is more astringent and is primarily used as a hemostatic for various bleeding conditions, with a secondary stasis-resolving effect. Pu Huang's stasis-resolving action is much stronger, and it has the additional ability to treat blood strangury and urinary conditions. Pu Huang is the better choice when active stasis with pain is the main concern.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Pu Huang

Pu Huang is frequently adulterated due to limited supply and high demand. Common adulterants include: (1) Pine pollen (松花粉, Song Hua Fen from Pinus species), which is similar in appearance but has a different taste and lacks Pu Huang's Blood-moving properties. The classical text Lei Gong Pao Zhi Lun specifically warns against this substitution. (2) Cattail fluff (蒲绒, Pu Rong), the non-medicinal fibrous down from the female flower spike, which is often ground up and mixed with genuine pollen to increase volume. The resulting product is called "Cao Pu Huang" (草蒲黄) and contains significant non-medicinal material. (3) Various fraudulent additions including cornstarch, wheat flour, talcum powder, limestone powder, fine sand, glass powder, sawdust, and yellow-dyed plant material. Genuine Pu Huang can be distinguished by its slippery feel, ability to float on water, and bright yellow colour that stains the fingers. The Chinese Pharmacopoeia specifies that material should pass through a No. 7 sieve to limit non-pollen content.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herb.

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Pu Huang

Non-toxic

Pu Huang is classified as non-toxic in the Chinese Pharmacopoeia. No toxic components or toxicity symptoms have been reported at standard dosages. However, because it is a pollen product, it may cause allergic reactions (sneezing, skin rash) in pollen-sensitive individuals. Adulteration is a more significant safety concern than intrinsic toxicity: Pu Huang has been found adulterated with pine pollen, cornstarch, talcum powder, limestone dust, sawdust, or excessive amounts of non-medicinal cattail fluff (蒲绒), all of which can compromise efficacy and safety.

Contraindications

Situations where Pu Huang should not be used or requires extra caution

Avoid

Pregnancy. Raw Pu Huang has a documented ability to stimulate uterine smooth muscle contraction, which may promote miscarriage or premature labor.

Caution

Active hemorrhage without blood stasis. In cases of bleeding caused purely by Qi deficiency failing to hold Blood (with no underlying stasis), raw Pu Huang's blood-moving properties may worsen the bleeding.

Caution

Patients taking anticoagulant or antiplatelet medications (e.g. warfarin, aspirin, clopidogrel). Pu Huang contains flavonoids and other compounds with both pro-coagulant and antiplatelet activity, potentially altering coagulation status unpredictably.

Caution

Scheduled surgery. Should be discontinued at least 1-2 weeks before any surgical procedure due to its effects on platelet aggregation and bleeding time.

Caution

Individuals with known pollen allergies. As a pollen product, Pu Huang may trigger allergic reactions in sensitive individuals.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. Pharmacological studies have demonstrated that Pu Huang directly stimulates uterine smooth muscle contraction and increases uterine tone. Clinical observations in postpartum women showed accelerated uterine involution and reduced lochia after oral administration, confirming its uterotonic effect. Classical sources also note that it can "cause descent of the fetus" (下血坠胎). This uterine-stimulating action poses a risk of miscarriage or premature labor.

Breastfeeding

No specific safety data exists for Pu Huang during breastfeeding. While it is not traditionally listed as contraindicated during lactation (and is in fact noted in some classical sources as promoting milk flow), its Blood-moving properties warrant caution. Use only under practitioner supervision during breastfeeding.

Children

No specific pediatric dosage guidelines are established in classical or modern texts. Pu Huang should be used in children only under qualified practitioner supervision, at reduced dosages proportional to body weight (typically one-third to one-half of the adult dose for older children). Classical sources note that cattail pollen mixed with honey was considered beneficial for children as a food supplement.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Pu Huang

Anticoagulant and antiplatelet medications (warfarin, heparin, aspirin, clopidogrel): Pu Huang contains flavonoids (such as isorhamnetin glycosides and quercetin derivatives) and sitosterol glucoside that have demonstrated both antiplatelet and fibrinolytic activity in laboratory studies. Concurrent use may unpredictably alter coagulation parameters, potentially increasing bleeding risk. Monitoring of INR or bleeding time is advised if co-administration is unavoidable.

Blood pressure medications: Some sources suggest Pu Huang may have mild hypotensive effects through its vascular actions. Caution is warranted when combining with antihypertensive drugs, though clinical evidence is limited.

Dietary Advice

Foods and dietary considerations when taking Pu Huang

When using Pu Huang to stop bleeding, avoid spicy, hot, and pungent foods (chilli peppers, alcohol, fried foods) that may aggravate Blood Heat and counteract its hemostatic action. When using it to invigorate Blood and relieve pain, avoid excessive cold and raw foods that may impede Blood circulation. In general, a bland, easily digestible diet supports the herb's therapeutic effects.

Botanical Description

Physical characteristics and morphology of the Pu Huang source plant

Pu Huang is the dried pollen of cattail plants in the family Typhaceae, primarily Typha angustifolia L. (narrowleaf cattail) and Typha orientalis Presl (Oriental cattail), along with closely related species. These are perennial, rhizomatous, herbaceous aquatic plants that grow 1.5 to 3 metres tall in shallow freshwater marshes, lake edges, river banks, ponds, and irrigation ditches.

The plants are monoecious, bearing separate male and female flower spikes on the same stem. The male (staminate) spike sits at the top of the flowering stalk above the larger, brown, cigar-shaped female spike. The narrow, linear leaves are 3 to 12 mm wide, distinctly slenderer in T. angustifolia than in the broad-leaved T. latifolia. In summer (typically June to July), the male flowers release vast quantities of fine golden-yellow pollen, which is collected, dried, and sifted to produce the medicinal material.

Sourcing & Harvesting

Where Pu Huang is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Summer (June to July), when the male flower spikes are just beginning to open and pollen has not yet dispersed.

Primary growing regions

Pu Huang is primarily produced in the provinces of Zhejiang, Jiangsu, Shandong, Anhui, and Hubei in China. It is also found across northeast China, north China, and parts of the southwest. The species grows widely in marshes, shallow ponds, lake margins, and irrigation ditches throughout the temperate and subtropical regions of Eurasia. Classical sources note that the herb from Mount Tai (Taishan) in Shandong was considered of superior quality.

Quality indicators

Good quality Pu Huang is a fine, bright golden-yellow powder that is extremely light and floats when placed on water. When rubbed between the fingers, it feels smooth and slippery and easily adheres to the skin, staining it yellow. It has a very faint aroma and a bland taste. Under magnification, the pollen grains should appear as roughly spherical to elliptical particles, approximately 17 to 29 micrometres in diameter, with a characteristic net-like (reticulate) surface pattern. The best quality herb is pure, free from impurities, and sinks minimally in water. Avoid material that is brownish, coarse, gritty, or that sinks rapidly in water, which may indicate adulteration with non-pollen material.

Classical Texts

Key passages from the classical Chinese medical texts that describe Pu Huang and its therapeutic uses

Shen Nong Ben Cao Jing (《神农本草经》, The Divine Farmer's Classic of Materia Medica)

Original: 蒲黄，味甘，平。主心腹膀胱寒热，利小便，止血，消瘀血。久服轻身，益气力，延年神仙。

Translation: Pu Huang, sweet in flavour, neutral in nature. Treats cold and heat conditions of the Heart, abdomen, and Bladder. Promotes urination, stops bleeding, and disperses stagnant blood. Long-term use lightens the body, strengthens Qi, and prolongs life.

Ben Cao Gang Mu (《本草纲目》, Compendium of Materia Medica, Li Shizhen)

Original: 蒲黄，手足厥阴血分药也，故能治血治痛。生则能行，熟则能止……凉血，活血，止心腹诸痛。

Translation: Pu Huang is a Blood-level medicine for the hand and foot Jueyin channels, hence it can treat Blood disorders and pain. Used raw it can move [Blood]; prepared it can stop [bleeding]... It cools Blood, invigorates Blood, and stops various pains of the chest and abdomen.

Ben Cao Hui Yan (《本草汇言》)

Original: 蒲黄，性凉而利……至于治血之方，血之上者可清，血之下者可利，血之滞者可行，血之行者可止。凡生用则性凉，行血而兼消；炒用则味涩，调血而且止也。

Translation: Pu Huang is cool in nature and promotes flow... As for treating Blood conditions: Blood rising above can be cleared, Blood sinking below can be drained, stagnant Blood can be moved, and flowing Blood [hemorrhage] can be stopped. Used raw it is cool in nature, moves Blood and also disperses; stir-fried it becomes astringent, regulates Blood and stops bleeding.

Historical Context

The history and evolution of Pu Huang's use in Chinese medicine over the centuries

Pu Huang was first recorded in the Shen Nong Ben Cao Jing (《神农本草经》), where it was classified as a "superior" (上品) herb, indicating that it was considered safe for long-term use. The classical name literally means "cattail yellow," referring to the bright golden-yellow pollen of the cattail plant (蒲, the cattail; 黄, yellow).

A famous historical anecdote involves Emperor Duzong of the Southern Song Dynasty, who developed a severe, sudden swelling of the tongue that filled his entire mouth, leaving him unable to speak or eat. The imperial physician Cai prescribed a simple powder of equal parts Pu Huang and dried ginger (Gan Jiang) applied directly to the swollen tongue, which rapidly cured the condition. Li Shizhen later cited this case in the Ben Cao Gang Mu as evidence of Pu Huang's ability to cool and invigorate Blood. A similar earlier account in Xu Shuwei's Ben Shi Fang (《本事方》) tells of a woman whose swollen tongue was cured by frequent application of Pu Huang powder alone.

The distinction between raw and charred forms was first clearly articulated in the Song Dynasty's Da Ming Ben Cao (《日华子本草》), which stated: "to break Blood and reduce swelling, use it raw; to supplement Blood and stop bleeding, stir-fry it." This principle of "生用行血，炒用止血" (raw to move Blood, charred to stop bleeding) has been a cornerstone of Pu Huang's clinical use ever since, though modern clinical experience suggests that even the raw form has significant hemostatic properties.

Modern Research

2 published studies investigating the pharmacological effects or clinical outcomes of Pu Huang

1

Experimental study on the hemostatic activity of Pollen Typhae (in vitro and animal study, 2011)

Ohkura N, et al. Journal of Ethnopharmacology, 2011, 136(1), 254-260

This study demonstrated that an acidic polysaccharide fraction from Pu Huang activated coagulation factor XII in vitro, contributing to its external hemostatic properties. In a mouse tail-bleeding model, oral administration of the whole pollen extract reduced bleeding time, but the acidic polysaccharide alone did not, suggesting that the oral hemostatic effect depends on other constituents such as flavonoids with anticoagulant and fibrinolytic activity.

PubMed
2

Comprehensive quality evaluation and botanical differentiation of Typhae Pollen using UHPLC-DAD/Q-TOF-MS (analytical study, 2025)

Xu XL, et al. Phytochemical Analysis, 2025

This study developed methods to distinguish pollen from the two official Pharmacopoeia source species (T. angustifolia and T. orientalis) using scanning electron microscopy and chemical profiling. It identified 17 flavonoids and phenolic acids, demonstrating distinct chemical profiles between the two species. The findings provide a foundation for improved quality control of Pu Huang.

PubMed

Research on individual TCM herbs is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.