Herb Flower (花 huā)

Hong Hua

Safflower · 红花

Carthamus tinctorius L. · Flos Carthami

Also known as: Carthamus flower, Flos Carthami Tinctorii, Grass safflower (草红花 Cǎo Hóng Huā),

Hong Hua (Safflower) plant

Images shown are for educational purposes only

Safflower is one of the most widely used Blood-moving herbs in Chinese medicine. It is best known for promoting circulation and relieving pain caused by Blood stasis, making it a go-to herb for menstrual problems (painful or absent periods), traumatic injuries with bruising, and chest pain from poor circulation. It should not be used during pregnancy.

Category Blood-invigorating and stasis-dispelling herbs (活血化瘀药) Blood-invigorating and menstruation-regulating herbs (活血调经药)
Therapeutic focus Menstrual Health Pain Management Cardiovascular Health Injury and Trauma Recovery

TCM Properties

Temperature

Warm

Taste

Acrid / Pungent (辛 xīn)

Channels entered

Heart, Liver

Parts used

Flower (花 huā)

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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 Hong Hua does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Hong Hua is primarily used to support these areas of health:

Menstrual Health Pain Management Cardiovascular Health Injury and Trauma Recovery

TCM Actions

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

Invigorates Blood and Regulates Menstruation Invigorates Blood and Alleviates Pain Disperses Fixed Masses Promotes Tissue Regeneration and Heals Sores

How these actions work

'Invigorates Blood and unblocks menstruation' means Hóng Huā actively promotes the flow of Blood through the vessels and the uterine channels. Its acrid taste disperses stagnation while its warm nature drives movement through the Blood level. This is the herb's primary action, and it is used whenever menstrual flow is blocked or scanty due to Blood stasis, including absent periods, painful periods, and retained postpartum lochia (the normal discharge after childbirth that should clear within a few weeks).

'Dispels Blood stasis and alleviates pain' means Hóng Huā breaks up areas where Blood has become stuck and pooled, which in TCM is the root cause of many types of fixed, stabbing pain. This applies broadly: chest pain with a stabbing quality (as in angina), pain from traumatic injuries with bruising and swelling, and pain in the flanks or abdomen from internal stasis. In small doses (3 to 5 grams), Hóng Huā gently nourishes and moves Blood; in larger doses (6 to 10 grams), its stasis-dispelling power becomes more pronounced.

'Resolves masses and abdominal accumulations' refers to the herb's ability to gradually break down firm, palpable lumps in the abdomen (called zhēng jiǎ in TCM), which are understood as congealed Blood. This includes conditions such as uterine fibroids or other pelvic masses when they present with Blood stasis signs. For this purpose it is typically combined with stronger stasis-breaking herbs.

'Promotes healing of sores and carbuncles' reflects its ability to move Blood to areas of local stagnation. When an abscess or sore fails to resolve, Blood stasis is often the underlying obstruction. Hóng Huā helps restore circulation to the affected area, reducing swelling and pain, and is typically combined with heat-clearing and toxin-resolving herbs for this purpose.

Patterns Addressed

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

Why Hong Hua addresses this pattern

Hóng Huā is one of the most direct and representative herbs for treating Blood stasis. Its acrid taste disperses congealed Blood, while its warm nature activates circulation through the Heart and Liver channels, the two organ systems most closely tied to Blood flow. The Heart governs the blood vessels, and the Liver stores Blood and ensures its smooth flow. When Blood stasis obstructs these channels, fixed stabbing pain, dark complexion, and purple tongue appear. Hóng Huā enters both channels to break up stagnation at its source, restoring smooth Blood circulation and relieving pain.

A practitioner would look for one or more of these signs

Chest Pain

Fixed, stabbing chest pain that worsens at night

Abdominal Pain

Abdominal pain with palpable masses, worse with pressure

Bruising

Easy bruising or dark purple bruises slow to resolve

Dark Complexion

Dark or dusky facial complexion, dark lips

Commonly Used For

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

Arises from: Blood Stasis in the Uterus

TCM Interpretation

TCM understands painful menstruation primarily through the principle 'when there is obstruction, there is pain' (不通则痛). When Blood stasis blocks the uterus and the Chōng and Rèn vessels, the menstrual blood cannot flow freely, causing cramping, stabbing lower abdominal pain that typically worsens before and during the period. The blood itself appears dark, purplish, and clotted. Cold congealing in the uterus, Liver Qi stagnation, or trauma can all lead to this stasis. The Liver channel, which passes through the lower abdomen and governs the smooth flow of Blood, is the key organ system involved.

Why Hong Hua Helps

Hóng Huā's acrid, warm nature makes it ideally suited for menstrual pain caused by Blood stasis. It enters the Liver and Heart channels and works directly in the Blood level to break up clotted, stagnant Blood in the uterus. Its warmth counteracts the cold that often contributes to congealing, while its acrid taste disperses the stagnation. It is typically paired with Táo Rén (peach kernel) for stronger stasis-breaking power, or with Dāng Guī (Angelica root) to simultaneously nourish the Blood so that dispelling stasis does not leave the body depleted.

Also commonly used for

Postpartum Abdominal Pain

Pain from retained lochia after childbirth

Uterine Fibroids

Abdominal masses with Blood stasis signs

Coronary Artery Disease

Support for cardiovascular circulation alongside standard treatment

Stroke

Post-stroke recovery with hemiplegia from Qi deficiency and Blood stasis

Hyperlipidemia

Elevated blood lipids associated with Blood stasis

Skin Rashes

Dark-colored rashes or skin discoloration from stasis-heat

Herb Properties

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

Temperature

Warm

Taste

Acrid / Pungent (辛 xīn)

Channels Entered

Heart Liver

Parts Used

Flower (花 huā)

Dosage & Preparation

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

Standard dosage

3-10g

Maximum dosage

Up to 15g in decoction for severe Blood stasis conditions, under practitioner supervision. Standard clinical range is 3-10g.

Dosage notes

Hong Hua follows the classical principle that small doses nourish Blood while large doses move and break Blood stasis. At lower doses (1-3g), it gently harmonizes Blood circulation and can be used as a supporting herb. At standard doses (3-6g), it actively promotes Blood flow and unblocks the menses. At higher doses (6-10g or above), it vigorously dispels Blood stasis and is used for more severe stagnation such as abdominal masses or stubborn pain from trauma. When combined with Tao Ren (peach kernel), the two herbs work synergistically as a classic Blood-moving pair. Decocting with wine (jiu zhi) enhances the herb's ability to reach the Blood level and the upper body.

Preparation

Hong Hua does not require special decoction handling. It is added to the decoction pot along with other herbs and cooked normally. However, excessive boiling time may degrade its delicate aromatic and active components, so a moderate decoction time is preferred. For external use, it can be steeped in alcohol to make a tincture for topical application on bruises and trauma.

Processing Methods

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

Processing method

The cleaned raw herb is stir-fried over gentle heat (wén huǒ) until slight scorch spots appear, then removed and cooled.

How it changes properties

Stir-frying slightly moderates the herb's Blood-moving intensity, making it somewhat gentler. The warm nature and acrid taste are preserved but the overall potency is somewhat reduced. The colour deepens and slight charring develops.

When to use this form

Used when a milder Blood-moving effect is desired, for example in patients who are slightly Blood-deficient but still need gentle stasis resolution, or when there is concern about the raw form being too forceful.

Common Herb Pairs

These ingredients are traditionally combined with Hong Hua for enhanced therapeutic effect

Tao Ren
Tao Ren Táo Rén 9-12g : Hóng Huā 6-9g

The most classic Blood-invigorating pair in TCM. Táo Rén (peach kernel) is stronger at breaking up substantial, congealed Blood stasis, while Hóng Huā excels at moving Blood through the vessels and unblocking menstrual flow. Together they provide both the power to break stubborn clots and the circulatory drive to clear the stasis away. This pair forms the backbone of nearly all major Blood stasis formulas.

When to use: Any significant Blood stasis pattern: painful or absent periods with dark clotted blood, chest pain from Heart Blood stasis, post-traumatic swelling and bruising, or abdominal masses.

Dang Gui
Dang Gui Dāng Guī 9-15g : Hóng Huā 6-9g

Dāng Guī (Angelica root) nourishes and harmonizes Blood, while Hóng Huā invigorates Blood and dispels stasis. This pairing embodies the key TCM strategy of 'dispelling stasis while nourishing Blood,' ensuring that moving stagnation does not deplete the body's Blood supply. Together they activate circulation while simultaneously replenishing Blood.

When to use: Menstrual disorders involving both Blood deficiency and Blood stasis, such as painful periods with pale complexion or scanty flow, or postpartum recovery where lochia is retained alongside general weakness.

Chuan Xiong
Chuan Xiong 1:1 (typically 6-9g each)

Chuān Xiōng (Szechuan lovage root) is known as 'the Qi herb within the Blood,' meaning it moves Qi within the Blood level to help drive Blood circulation. Paired with Hóng Huā, which directly moves Blood, the combination addresses both Qi stagnation and Blood stasis simultaneously. Since Qi is the commander of Blood, moving Qi amplifies the Blood-moving effect.

When to use: Headaches, chest pain, or menstrual pain where Qi stagnation and Blood stasis coexist, especially with a stabbing quality and emotional stress component.

Dan Shen
Dan Shen Dān Shēn 15-30g : Hóng Huā 6-9g

Dān Shēn (Salvia root) invigorates Blood and cools Blood, while Hóng Huā invigorates Blood with warm, acrid properties. Together they provide a balanced approach to Blood stasis that works in both heat and cold patterns. Dān Shēn also calms the spirit, complementing Hóng Huā's cardiovascular benefits when Heart Blood stasis causes anxiety or insomnia.

When to use: Chest pain from Heart Blood stasis (angina), especially with accompanying restlessness or insomnia. Also used for cardiovascular support in coronary heart disease.

Key Formulas

These well-known formulas feature Hong Hua in a prominent role

Xue Fu Zhu Yu Tang 血府逐瘀湯 King

The most famous Blood stasis formula in Chinese medicine, created by Wáng Qīng Rèn in the Qing dynasty. Hóng Huā serves as co-King alongside Táo Rén, directly showcasing its core Blood-invigorating and stasis-dispelling action within the chest. The formula treats chest Blood stasis causing fixed stabbing pain, insomnia, and emotional irritability.

Tao Hong Si Wu Tang 桃紅四物湯 King

This formula adds Hóng Huā and Táo Rén to the classical blood-nourishing Sì Wù Tāng (Four Substances Decoction), transforming it from a pure Blood-nourishing formula into one that simultaneously nourishes and invigorates Blood. Hóng Huā is a defining addition that makes this the standard formula for Blood stasis menstrual disorders, perfectly demonstrating how it unblocks menstruation while working alongside Blood-tonifying herbs.

Bu Yang Huan Wu Tang 補陽還五湯 Assistant

Wáng Qīng Rèn's formula for post-stroke hemiplegia from Qi deficiency with Blood stasis. The massive dose of Huáng Qí (up to 120g) is the King, while Hóng Huā plays an assistant role alongside other Blood-movers. This formula demonstrates how Hóng Huā supports recovery from Qi deficiency-driven Blood stasis, a different mechanism from its King role in pure stasis formulas.

Comparable Ingredients

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

Xi Hong Hua
Hong Hua vs Xi Hong Hua

Xī Hóng Huā (saffron crocus, Crocus sativus) has similar Blood-invigorating and stasis-dispelling actions but is considerably stronger. It is sweet and cool rather than acrid and warm, so it also cools Blood and resolves toxins, making it more suitable for stasis-heat patterns with skin rashes or emotional agitation. Hóng Huā is the standard choice for everyday Blood stasis; Xī Hóng Huā is reserved for more severe or heat-complicated cases, partly because it is far more expensive and used in much smaller doses (1 to 3 grams versus 3 to 10 grams).

Tao Ren
Hong Hua vs Tao Ren

Both are front-line Blood stasis herbs and are frequently used together. Táo Rén has stronger stasis-breaking power and is better at resolving substantial, fixed masses and constipation from Blood dryness. Hóng Huā is gentler and better at broadly moving Blood through the vessels and unblocking menstrual flow. When Blood stasis is severe with palpable lumps, Táo Rén takes the lead; when the goal is to promote overall circulation and regulate menstruation, Hóng Huā is primary.

Yi Mu Cao
Hong Hua vs Yi Mu Cao

Both herbs invigorate Blood and regulate menstruation, but Yì Mǔ Cǎo (motherwort) also promotes urination and reduces edema, making it better suited for postpartum conditions involving both Blood stasis and fluid retention. Hóng Huā is more broadly applicable across all Blood stasis patterns (chest, abdomen, trauma), while Yì Mǔ Cǎo is more specifically a gynaecological herb.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Hong Hua

The most important distinction is between Hong Hua (红花, Carthamus tinctorius, safflower) and Xi Hong Hua / Fan Hong Hua (西红花/番红花, Crocus sativus, saffron crocus). Despite similar names, these are entirely different plants from different families (Asteraceae vs. Iridaceae) with different medicinal parts (tubular florets vs. stigmas), different properties (warm vs. cool), and vastly different prices (saffron crocus is many times more expensive). Hong Hua should never be substituted for Xi Hong Hua or vice versa. A significant quality concern is illegal dyeing of Hong Hua. Market surveillance has found that over 20% of tested samples were adulterated with synthetic colorants including Acid Red 73, Lemon Yellow, Sunset Yellow, Carmine, and Orange II. Some batches were also found to be "spent" herb (drug residue after industrial extraction of active compounds) re-entering the market, which has very low levels of the active constituent hydroxysafflor yellow A (HSYA). Some sellers also spray Hong Hua with concentrated sugar water or salt water to increase weight, or mix in safflower seeds, stems, and leaves.

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

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Hong Hua

Non-toxic

Hong Hua is classified as non-toxic (无毒) in the Ben Cao Gang Mu and the Chinese Pharmacopoeia. In animal studies, its oral toxicity is very low: the LD50 of safflower decoction given orally to mice is approximately 20.7 g/kg body weight, indicating a wide safety margin at standard clinical doses. However, overdose can cause adverse effects including abdominal discomfort, cramping, diarrhea, and potentially gastrointestinal bleeding. In severe overdose cases, symptoms may include lethargy, tremors, convulsions, and respiratory depression. A quality concern in the market is illegal dyeing of low-quality Hong Hua with synthetic colorants (such as Acid Red 73, Lemon Yellow, Sunset Yellow), which can pose health risks unrelated to the herb itself. Always source from reputable suppliers.

Contraindications

Situations where Hong Hua should not be used or requires extra caution

Avoid

Pregnancy. Hong Hua strongly invigorates Blood and stimulates uterine contractions, posing a significant risk of miscarriage or premature labor.

Avoid

Active hemorrhage or heavy menstrual bleeding (menorrhagia). Hong Hua's Blood-moving properties can worsen bleeding.

Avoid

Patients with bleeding disorders (hemophilia, thrombocytopenia) or those on anticoagulant/antiplatelet therapy without close medical supervision.

Avoid

Peptic ulcers with active bleeding. The herb's Blood-invigorating action can aggravate gastrointestinal hemorrhage.

Caution

Excessive or prolonged menstruation. Use with caution or avoid, as Hong Hua promotes menstrual flow and may increase blood loss.

Caution

Pre-surgical patients. Discontinue at least 1-2 weeks before planned surgery due to anticoagulant and antiplatelet effects.

Caution

Individuals with Blood deficiency without concurrent Blood stasis. Hong Hua moves Blood and can further deplete Blood if no stasis is present. Should be combined with Blood-nourishing herbs if used.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. Hong Hua strongly promotes Blood circulation and has been shown to stimulate uterine contractions in pharmacological studies. This uterine-stimulating action poses a clear risk of miscarriage or premature labor. In Chinese cultural and medical history, safflower has long been recognized as potentially abortifacient, and it is one of the most well-known pregnancy-prohibited herbs in TCM. It should be strictly avoided throughout all trimesters of pregnancy.

Breastfeeding

Use with caution during breastfeeding. While there is limited specific research on Hong Hua's transfer through breast milk, its Blood-invigorating and anticoagulant properties theoretically could affect the nursing infant. Small doses used short-term under practitioner guidance for postpartum Blood stasis recovery are part of traditional practice, but prolonged or high-dose use should be avoided. Discontinue if any unusual bleeding or symptoms are observed in the infant.

Children

Hong Hua is generally not recommended for young children. If used in older children or adolescents under practitioner supervision, dosage should be significantly reduced (typically one-third to one-half of the adult dose, depending on age and body weight). It should not be used in children with bleeding tendencies. In girls who have not yet reached menarche, its Blood-moving actions are rarely indicated.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Hong Hua

Anticoagulants (warfarin, heparin): Hong Hua has well-documented anticoagulant and antiplatelet effects. Its active component safflower yellow (hydroxysafflor yellow A) has been shown to prolong prothrombin time (PT), thrombin time (TT), and activated partial thromboplastin time (APTT), and to inhibit platelet aggregation. When used concurrently with warfarin, it may significantly enhance anticoagulant effects and increase bleeding risk. Concurrent use requires close monitoring of INR and coagulation parameters.

Antiplatelet drugs (aspirin, clopidogrel): Safflower's inhibition of ADP-induced platelet aggregation may have additive effects with antiplatelet medications, increasing bleeding risk.

NSAIDs: Potential additive effect on bleeding risk due to combined antiplatelet and blood-thinning actions.

Antihypertensives: Hong Hua has mild vasodilatory and blood-pressure-lowering effects in pharmacological studies; concurrent use with antihypertensive medications may cause additive hypotensive effects.

Dietary Advice

Foods and dietary considerations when taking Hong Hua

When taking Hong Hua for Blood stasis conditions, avoid excessively cold and raw foods, which may constrict Blood vessels and counteract its Blood-moving effects. Light, warm, and easily digestible foods are preferred. Moderate use of wine or vinegar in cooking may complement the herb's Blood-invigorating action. Avoid greasy, heavy foods that may obstruct the Spleen and hinder the proper circulation of Blood.

Botanical Description

Physical characteristics and morphology of the Hong Hua source plant

Carthamus tinctorius L. is an annual herbaceous plant in the Asteraceae (Compositae) family, growing 30 to 100 cm tall. The stems are erect, branching in the upper portion, with fine longitudinal grooves and a somewhat woody base. Leaves are alternate, sessile, oval to lanceolate, clasping the stem at the base, with hard texture and spiny-toothed margins. Both leaf surfaces are smooth and hairless.

The flower heads are terminal, arranged in a corymb-like cluster, each surrounded by several layers of involucral bracts: the outer bracts are green and lanceolate with sharp spines on the edges, while the inner bracts are white and membranous. All flowers in the head are tubular (no ray florets), initially opening yellow and gradually turning to a vivid orange-red as they mature. The fruits are small elliptical achenes, about 5 mm long, white, and lacking a pappus. The flowering period runs from May to July, with fruits maturing from July to September.

The plant is drought-tolerant and relatively cold-hardy, with a deep taproot that can reach over 2 meters. It prefers well-drained, fertile sandy loam or clay loam soils and tolerates moderate salinity. It does not tolerate waterlogging. Safflower has been cultivated across China and many other countries as both a medicinal plant and a source of red dye and cooking oil.

Sourcing & Harvesting

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

Harvesting season

Late May to mid-June, during peak flowering. Flowers are picked early in the morning (6-8 AM) while still dewy, when the tubular florets have fully opened and turned from yellow to orange-red.

Primary growing regions

Xinjiang province is China's largest producer and the most important modern growing region for Hong Hua, known for high yields and good quality. Historically, Hong Hua also features among the dao di yao cai (terroir herbs) of Henan province (alongside the famous "Four Huai Herbs"), as well as Sichuan and Yunnan. Other significant production areas include Zhejiang, Jiangsu, and parts of Central China. The plant was originally introduced to China from western regions (Central Asia) via the Silk Road during the Han Dynasty, and it is now cultivated widely worldwide, including in India, Iran, Egypt, and the Americas.

Quality indicators

Good quality Hong Hua consists of tubular florets 1-2 cm long, with a vivid red or reddish-yellow color that appears bright and fresh. The texture should be soft and pliable, not brittle or crumbling. There should be a subtle, distinctive aroma (sometimes described as slightly pungent or musty) and a mildly bitter taste. The color should come from the flower itself and not stain the fingers excessively when handled (excessive staining may indicate illegal dyeing with synthetic colorants). Avoid material that appears dark, blackish-red, or dried-out, as this indicates late harvesting, poor processing, or age. Also reject batches with excessive stems, leaves, or seed fragments mixed in. When placed in water, authentic Hong Hua should slowly release a golden-yellow color; if the water turns bright artificial-looking red or orange immediately, adulteration with synthetic dyes should be suspected.

Classical Texts

Key passages from the classical Chinese medical texts that describe Hong Hua and its therapeutic uses

Jin Gui Yao Lue (金匮要略) by Zhang Zhongjing

Hong Hua's earliest medicinal record appears in Zhang Zhongjing's Jin Gui Yao Lue, in the chapter on miscellaneous gynecological diseases, where the "Red-Blue Flower Wine" formula (红蓝花酒方) is used for treating gynecological Blood stasis conditions.

Tang Ben Cao (唐本草)

「治口噤不语，血结，产后诸疾。」
"Treats lockjaw with inability to speak, Blood clotting, and various postpartum diseases."

Kai Bao Ben Cao (开宝本草)

「主产后血运口噤，腹内恶血不尽、绞痛，胎死腹中，并酒煮服。亦主蛊毒下血。」
"Primarily treats postpartum Blood dizziness with lockjaw, retained foul Blood in the abdomen with colicky pain, and dead fetus retained in the abdomen; all taken decocted with wine. Also treats toxic poisoning with bloody stools."

Ben Cao Gang Mu (本草纲目) by Li Shizhen

「活血，润燥，止痛，散肿，通经。」
"Invigorates Blood, moistens dryness, stops pain, disperses swelling, and unblocks the menses."

Ben Cao Jing Feng Yuan (本草经逢原)

「血生于心包，藏于肝，属于冲任，红花汁与之同类。故能行男子血脉，通妇人经水，活血，解痘毒，散赤肿。」
"Blood is generated by the Pericardium, stored in the Liver, and belongs to the Chong and Ren vessels. Safflower juice is of the same category. Therefore it can move men's blood vessels, open women's menstrual flow, invigorate Blood, resolve pox toxins, and disperse red swelling."

Yao Pin Hua Yi (药品化义) by Jia Suoxue, Ming Dynasty

「红花，善通利经脉，为血中气药。能泻而又能补，各有妙义。」
"Hong Hua excels at opening and freeing the channels and vessels; it is a Qi-moving herb within the Blood. It can both drain and supplement, each with its own subtle significance."

Historical Context

The history and evolution of Hong Hua's use in Chinese medicine over the centuries

Hong Hua (红花) has a rich history spanning over two thousand years. Its original name was "Hong Lan Hua" (红蓝花, "red-blue flower"), reflecting the blue-green tint of its leaves (resembling the indigo plant "lan") combined with its red flowers. The plant was introduced to China from Central Asia along the Silk Road during the Western Han Dynasty (around the 2nd century BCE) and was valued both as a vivid red textile dye and as a medicine. The name "Hong Hua" (simply "red flower") became standard from the Tang Dynasty onward.

Its earliest known medicinal use appears in Zhang Zhongjing's Jin Gui Yao Lue (circa 3rd century CE), where the "Red-Blue Flower Wine" (红蓝花酒) formula is prescribed for gynecological Blood stasis. A famous Song Dynasty medical case recorded in the Yang Ke Man Bi tells of the physician Lu who revived a woman thought dead from postpartum Blood stasis by steaming her over a large pot of boiling Hong Hua decoction, dramatically demonstrating the herb's Blood-invigorating power. Beyond medicine, Hong Hua was used to make rouge (燕脂/胭脂) for cosmetics and was the primary source of true red dye throughout Chinese history until the introduction of synthetic dyes in the late 19th century. In Tibetan and Mongolian medicine, Hong Hua is also a prominent herb, valued for clearing Liver heat and regulating menstruation. It should not be confused with Xi Hong Hua (西红花, Crocus sativus, saffron crocus), which is a completely different plant from the Iridaceae family with distinct properties and a much higher price.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Hong Hua

1

Phytochemical and pharmacological review of Carthamus tinctorius L. in TCM (Review, 2014)

Zhou X, Tang L, Xu Y, Zhou G, Wang Z. Journal of Ethnopharmacology, 2014, 151(1): 27-43.

A comprehensive review covering over 104 compounds isolated from safflower, including its characteristic quinochalcones and flavonoids. The paper summarized wide-ranging pharmacological activities including coronary artery dilation, myocardial ischemia protection, anticoagulation, antithrombosis, anti-inflammation, antioxidation, and analgesia. It also addressed quality control and toxicity issues.

Link
2

Systematic review and meta-analysis: Safflower injection for acute coronary syndrome (Meta-analysis, 2021)

Lu Q, Xu J, Li Q, et al. Evidence-Based Complementary and Alternative Medicine, 2021, 2021: 6617772.

A meta-analysis of 16 randomized controlled trials involving 1620 patients found that safflower injection combined with conventional treatment significantly improved total effectiveness rates, ECG outcomes, and left ventricular ejection fraction (LVEF) compared to conventional treatment alone for acute coronary syndrome.

PubMed
3

Meta-analysis: Safflower yellow injection for unstable angina pectoris (Meta-analysis, 2013)

Kong D, Xia W, Zhang Z, et al. Journal of Traditional Chinese Medicine, 2013, 33(5): 553-561.

A meta-analysis of 7 RCTs with 1134 patients showed that safflower yellow injection combined with conventional therapy significantly improved angina symptoms and ischemic ECG findings compared to conventional therapy alone. The results were statistically stable across subgroups.

PubMed
4

Interaction between Chinese medicine and warfarin: clinical and research update (Review, 2021)

Frontiers in Pharmacology, 2021, 12: 751107.

This review documented that safflower yellow can inhibit platelet aggregation, prolong prothrombin time (PT), thrombin time (TT), and activated partial thromboplastin time (APTT), and may produce synergistic anticoagulant effects when co-administered with warfarin. The review highlighted Hong Hua among herbs requiring caution with anticoagulant therapy.

Link

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.