Traditionally used for
- Digestion
- Urinary & fluids
- Menstrual & women's health
- Sleep
- Mood & calm
- Nerves & recovery
Cautions & contraindications
- Pregnancy
☯ TCM Properties
Invigorates the Blood, dispels Stasis and unblock the menses; Cools the Blood and resolves toxicity
Traditional Chinese Uses
Fan Hong Hua, also called Xi Hong Hua (Stigma Croci) — saffron — consists of the dried red stigmas of Crocus sativus, a Blood-regulating herb. Sweet and cold, entering the Heart and Liver channels, it invigorates the Blood, dispels stasis and unblocks the menses, and, because of its cold nature, also cools the Blood and resolves toxicity. It is stronger than the related Hong Hua (safflower) and additionally suited to stasis with Heat.
It treats Blood-stasis patterns such as amenorrhea, painful menstruation and retained lochia, chest and hypochondriac fullness or pain from stagnant Qi and Blood with emotional constraint ("depression"), and stasis-Heat with dark maculopapular rashes or agitation. Small doses (about 1-3 g, steeped or added to decoction) suffice. It is CONTRAINDICATED IN PREGNANCY, as it can stimulate uterine contraction; overdose can cause vomiting, colic, gastrointestinal or urinary bleeding and convulsions.
Western Herbalism Properties
Relationships
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Botanical Description
Fan Hong Hua (番红花), saffron, consists of the dried red stigmas of Crocus sativus L., a sterile autumn-flowering cormous perennial in the Iridaceae cultivated in Iran, Kashmir, Spain, and parts of western China. The plant produces a flat-topped corm 3–5 cm across that sends up a tuft of narrow grass-like leaves with a central pale stripe, alongside solitary cup-shaped flowers of intense lilac-purple with darker veins. Each flower bears three long deep-crimson stigmatic branches that are hand-collected at dawn and carefully dried to yield the costliest of culinary and medicinal spices. The dried threads are aromatic, yielding the orange-yellow pigment crocin and the bitter principle picrocrocin. Distinguished from Cao Hong Hua (Carthamus tinctorius safflower), which is unrelated.
Active Constituents
Crocins (crocin-I and crocin-II, crocetin glycosyl esters)
Apocarotenoid glycosideConcentration: total crocins vary from about 6 to 16% of the dry stigma mass; the Chinese Pharmacopoeia requires crocin-I plus crocin-II to total not less than 10.0% on the dried basis
The water-soluble red pigments that give saffron its colour and most of its measurable pharmacology: antioxidant, anti-inflammatory and neuroprotective effects, promotion of neurogenesis, and modulation of serotonergic and dopaminergic signalling that underlies the antidepressant trials. Crocin content is the basis of the ISO 3632 colouring-strength grading of saffron. It is also the single least specific marker for identity, because Gardenia jasminoides fruit contains the same crocins.
Picrocrocin
Monoterpene glycosideConcentration: roughly 1 to 13% of the dry matter of saffron; one review gives about 3.7% of stigma weight
The bitter principle of saffron and the biosynthetic precursor of safranal, released on drying and hydrolysis. Because picrocrocin is far more specific to Crocus sativus than crocin is, its absence in a crocin-rich sample is one of the strongest single indications of adulteration with gardenia or another crocin source.
Safranal
Monoterpene aldehydeConcentration: reported between 0.001 and 0.006% of dry matter in some sources and between 0.04 and 0.48% in others, and about 6.4% of the essential oil by GC-MS
The aroma principle, formed from picrocrocin during drying and storage. It contributes anxiolytic, anticonvulsant and neuroprotective activity, and it is the constituent that some standardised commercial extracts are titrated against. It is also the most acutely toxic of the three main constituents in animal studies.
Crocetin
Apocarotenoid dicarboxylic acidThe lipophilic aglycone released when crocins are hydrolysed in the gut. Crocetin, not intact crocin, is the species that reaches the systemic circulation and crosses the blood-brain barrier, so it accounts for most central effects of an oral dose.
Kaempferol and quercetin glycosides
Flavonol glycosideFlavonols concentrated in the petals rather than the stigma, contributing antioxidant and anti-inflammatory activity. They matter clinically because one of the positive depression trials used petal, not stigma, so petal and stigma preparations are not interchangeable.
⚠ Drug Interactions
Carthamus tinctorius (safflower, Hong Hua) sold as or mixed into saffron
Safflower florets closely resemble saffron stigmas and are the classic saffron adulterant. In one market study, five of twenty saffron samples bought locally contained safflower at 8.3, 14.9, 19.4, 25.4 and 33.7% weight for weight, quantified by ion mobility spectrometry after optical microscopy screening. Systematic review evidence puts the global rate of saffron adulteration at 20 to 30%, ranging from about 3.5% in regulated EU markets to 60% in India. The two plants are also confused by name in Chinese pharmacy: Fan Hong Hua, Xi Hong Hua and Zang Hong Hua all mean Crocus sativus, while plain Hong Hua means Carthamus tinctorius, and the confusion is old. Li Shizhen, describing Fan Hong Hua in the Ben Cao Gang Mu, wrote that it came from the Muslim western regions and the country of Tianfang and was simply the Hong Lan Hua (safflower) of that place, conflating the two species outright.
Clinical note: Any efficacy claim for saffron applies only to authenticated stigma. Buy whole threads rather than powder, prefer suppliers who publish an ISO 3632 or Pharmacopoeia assay, and be suspicious of a low price. Hong Hua and Fan Hong Hua are different drugs at different doses; do not let one be substituted for the other on a prescription.
Gardenia jasminoides, Curcuma longa, Calendula officinalis, Buddleja officinalis and other Crocus species as botanical adulterants
The named botanical adulterants of saffron include Calendula officinalis, Buddleja officinalis, Gardenia jasminoides, Curcuma longa, Carthamus tinctorius, other Crocus species such as C. vernus and C. speciosus, and even the styles of the saffron plant itself, which are far weaker than the stigma. Gardenia is the most difficult of these because it is genuinely rich in crocins and is described in the literature as a saffron substitute, so a gardenia-adulterated sample can pass a colouring-strength test. Detection therefore requires methods that look beyond crocin: HPLC-DAD, UHPLC-DAD-MS, LC-MS/MS and GC-MS profiles including picrocrocin and safranal, DNA barcoding and PCR, mid-infrared and Raman spectroscopy, ion mobility spectrometry, hyperspectral imaging and stable-isotope and multi-element analysis for origin. In one mid-infrared study the four adulterants targeted were safflower, marigold, rubia and saffron style.
Clinical note: Treat crocin content alone as insufficient proof of identity. For clinical use, ask for a profile that includes picrocrocin and safranal, or DNA-based authentication, and note that DNA methods fail on heavily processed or degraded material.
Synthetic dyes used to colour adulterated saffron (tartrazine, sunset yellow, allura red, rhodamine B, erythrosine, Sudan dyes, auramine-O)
Beyond botanical substitution, saffron fraud includes the addition of hazardous synthetic dyes such as Sudan compounds and auramine-O, along with allura red, tartrazine, rhodamine B, sunset yellow, quinoline and erythrosine, and weight-increasing agents such as syrups, honey, glycerin, olive oil, mineral salts and even dried meat fibres. A systematic review of saffron fraud explicitly identifies exposure to carcinogenic dyes as a health risk of the practice. Dyes are detected by TLC, HPLC, UV-visible spectroscopy, FTIR and GC-MS.
Clinical note: This is a food-safety hazard, not a herb-drug interaction, and it is the strongest argument against buying cheap powdered saffron for any medicinal purpose. Powdered saffron of unverified origin should not be dispensed.
Pregnancy
Saffron is a documented emmenagogue and abortifacient at doses well above the therapeutic ones. A toxicology review of saffron and its constituents states that saffron can induce uterine contraction and bleeding in pregnant females and that the abortion rate is significantly higher among pregnant women exposed to a high level of saffron than in controls. An integrative review of saffron in pregnancy found that cultural practice in South Asia and the Middle East drives widespread use by pregnant women, and that the clinical safety evidence remains limited and inconclusive. The scale matters and is often lost: the antidepressant trials use 15 to 100 mg of stigma per day, whereas the intake associated with uterine effects is at the gram level, hundreds of times greater. This monograph does not state a specific abortifacient dose in grams, because the published figures in circulation are not traceable to a primary source we could verify.
Clinical note: Avoid medicinal doses of saffron in pregnancy. Culinary quantities in food are a different order of exposure from a concentrated supplement, but a pregnant patient taking saffron capsules should stop. Ask about it directly, because patients from saffron-using cultures often do not regard it as a medicine.
SSRI and other antidepressants (fluoxetine, sertraline, citalopram)
Saffron has been tested head to head against fluoxetine 40 mg/day, sertraline 100 mg/day and citalopram in randomised trials and performed comparably, and a meta-analysis found saffron as effective as synthetic antidepressants and better than placebo. The proposed mechanism is serotonergic along with antioxidant, anti-inflammatory, neuro-endocrine and neuroprotective effects. Because almost all the trial evidence is comparative rather than additive, the safety of combining saffron with an SSRI has not been established, and a theoretical additive serotonergic risk follows from the proposed mechanism.
Clinical note: Do not let a patient add saffron to an SSRI as a self-directed booster, and do not let a patient stop an antidepressant to switch to saffron without prescriber involvement. If both are used, watch for agitation, tremor, sweating and hyperreflexia.
Antihypertensive drugs
In a double-blind placebo-controlled study, saffron tablets 400 mg daily for seven days significantly decreased standing systolic blood pressure and mean arterial pressure in healthy volunteers. That is a higher dose than the 15 to 100 mg used in the depression trials, but it is a measured human effect rather than an extrapolation.
Clinical note: Check blood pressure and ask about dizziness on standing if a patient on antihypertensives takes high-dose saffron.
Warfarin, direct oral anticoagulants and antiplatelet agents
In the same seven-day human safety study, saffron slightly decreased red blood cells, haemoglobin, haematocrit and platelets, and raised sodium, blood urea nitrogen and creatinine, all within normal ranges and judged not clinically important in healthy volunteers. Independently, saffron extracts have measurable anticoagulant activity in vitro, and stigma ethanolic extract lengthened coagulation time in mice to about the same extent as aspirin. Saffron is also a blood-invigorating drug in Chinese use, prescribed to move stasis, which is consistent with the same direction of effect.
Clinical note: The finding in healthy volunteers is not alarming, but an anticoagulated patient is a different case. Check the INR after starting saffron on warfarin, ask about bruising, and stop it before surgery.
Evidence Tier
Strong evidence · 10 studiesRecorded studies by study design, strongest design at the top. This is a study-design tier only, not a GRADE rating: it does not weigh risk of bias, consistency or precision.
Systematic review / meta-analysis
3
3 verified · 0 unverified
Show 3 studies
- Safety and Efficacy of Saffron (Crocus sativus L.) for Treating Mild to Moderate Depression
- Saffron for mild cognitive impairment and dementia: a systematic review and meta-analysis of randomised clinical trials
- Combating saffron fraud: a systematic review of adulteration practices, detection technologies, recommendations and challenges
Randomized controlled trial
3
3 verified · 0 unverified
Show 3 studies
- A randomized, double-blind, clinical trial comparing the efficacy and safety of Crocus sativus L. with fluoxetine for improving mild to moderate depression in post percutaneous coronary intervention patients
- Crocus Sativus L. (saffron) versus sertraline on symptoms of depression among older people with major depressive disorders–a double-blind, randomized intervention study
- Crocus sativus L. (petal) in the treatment of mild-to-moderate depression: A double-blind, randomized and placebo-controlled trial
Other clinical trial
1
1 verified · 0 unverified
Observational / case report
0
In vitro / animal
2
0 verified · 2 unverified
Other / unclassified
1
1 verified · 0 unverified
Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description
Clinical Studies
Safety and Efficacy of Saffron (Crocus sativus L.) for Treating Mild to Moderate Depression
Meta-analysis of twelve studies of saffron in mild to moderate depression. Saffron improved depressive symptoms significantly more than placebo and was as effective as synthetic antidepressants, with no significant difference in adverse-effect rates against either placebo or comparator drugs.
A randomized, double-blind, clinical trial comparing the efficacy and safety of Crocus sativus L. with fluoxetine for improving mild to moderate depression in post percutaneous coronary intervention patients
Forty patients with mild to moderate depression after percutaneous coronary intervention were randomised to saffron 30 mg/day or fluoxetine 40 mg/day for six weeks. There was no significant difference in Hamilton Depression Rating Scale reduction, remission or response rates, or in the frequency of adverse events. Small sample and short follow-up are the stated limitations.
Crocus Sativus L. (saffron) versus sertraline on symptoms of depression among older people with major depressive disorders–a double-blind, randomized intervention study
Fifty older outpatients with major depressive disorder, mean age about 65, were randomised to saffron 60 mg/day or sertraline 100 mg/day for six weeks. Depression scores on the Hamilton scale fell over time with no advantage to either arm, extending the saffron evidence into an age group the earlier trials had not covered.
Crocus sativus L. (petal) in the treatment of mild-to-moderate depression: A double-blind, randomized and placebo-controlled trial
Forty adult outpatients with DSM-IV major depression received petal of Crocus sativus 30 mg/day or placebo for six weeks. Petal produced a significantly better Hamilton Depression Rating Scale outcome than placebo. Worth recording separately from the stigma trials: this is the petal, a different and far cheaper plant part with a flavonol rather than apocarotenoid profile, and a petal result does not transfer to a stigma product or the reverse.
Saffron for mild cognitive impairment and dementia: a systematic review and meta-analysis of randomised clinical trials
Four randomised trials of saffron in mild cognitive impairment and dementia. Saffron significantly improved cognition on the Alzheimer's Disease Assessment Scale-cognitive subscale and the Clinical Dementia Rating Scale. The effect sizes are modest and the evidence base small; in the underlying trials saffron did not differ significantly from donepezil or memantine.
Safety evaluation of saffron (Crocus sativus) tablets in healthy volunteers
Thirty healthy volunteers in three groups of ten received placebo or saffron stigma tablets at 200 or 400 mg daily for seven days, with haematological, biochemical and electrocardiographic monitoring. Clinical examination showed no gross change. The 400 mg dose significantly lowered standing systolic and mean arterial pressure; saffron slightly lowered red cells, haemoglobin, haematocrit and platelets and raised sodium, blood urea nitrogen and creatinine, all within normal ranges. This is the study that grounds the blood-pressure and bleeding cautions for saffron at high dose.
Combating saffron fraud: a systematic review of adulteration practices, detection technologies, recommendations and challenges
PRISMA-guided synthesis of 23 studies published 2015 to 2025. Reports that 20 to 30% of commercial saffron is adulterated globally with wide regional variation, about 3.5% in regulated EU markets against 60% in India. Common practices are substitution with safflower, marigold or turmeric, dilution with extraneous plant material, and addition of hazardous synthetic dyes including Sudan compounds and auramine-O. DNA barcoding, spectroscopy, hyperspectral imaging and machine learning detect adulteration accurately but face cost and accessibility barriers, and the review names exposure to carcinogenic dyes as a direct health risk.
Detection of Safflower Adulteration in Saffron Using Ion Mobility Spectroscopy
Used eugenol as an ion mobility spectrometry marker for safflower in saffron. Peak intensity rose with safflower content in laboratory mixtures at 25, 50, 75 and 100%. Of twenty saffron samples bought from local markets and screened under an optical microscope, five contained safflower, at 8.3, 14.9, 19.4, 25.4 and 33.7% weight for weight. A concrete measurement of how much foreign plant material a practitioner may be dispensing unawares.
Saffron and Pregnancy: Cultural Practices, Beliefs, and Safety Evidence: An Integrative Review
PRISMA-guided integrative review of twelve studies on saffron use in pregnancy and childbirth. Found that cultural practice strongly drives use, with women in South Asia and the Middle East taking saffron to improve fetal complexion, maternal strength and labour readiness, and concluded that the clinical efficacy and maternal and fetal safety evidence remains limited and inconclusive.
Solvent-based mid-infrared spectroscopy paired with modern machine learning approaches for saffron authentication
Analysed 111 authentic saffron samples from six Iranian regions with mid-infrared spectroscopy after ISO 3632-based extraction. Geographical origin was discriminated with 93.0% accuracy by PLS-DA and 95.5% by a random subspace discriminant ensemble, and the method was then applied to detect four common plant-based adulterants: safflower, marigold, rubia and saffron style. The inclusion of saffron's own style as an adulterant is the point most often missed, since it is the same plant but a far weaker part.
Historical Texts
Ben Cao Gang Mu
Ming dynasty, 1596Chinese Pharmacopoeia
Modern, current editionsReferences
- Ziani A, Bekkouch O, Ouahhoud S, Baddaoui S, Ben'Mbarek S, Bekkouch A, Khoulati A, Jaouadi B, Choi J, Choi M, Kim HJ, Benabbes R, Asehraou A, Park MN, Kim B, Saalaoui E. Phytochemistry, Biological Activities, Molecular Mechanisms, and Toxicity of Saffron (Crocus sativus L.): A Comprehensive Overview . Antioxidants (2025) [DOI]
- Drioiche A, Ailli A, Handaq N, Remok F, Elouardi M, Elouadni H, Al Kamaly O, Saleh A, Bouhrim M, Elazzouzi H, El Makhoukhi F, Zair T. Identification of Compounds of Crocus sativus by GC-MS and HPLC/UV-ESI-MS and Evaluation of Their Antioxidant, Antimicrobial, Anticoagulant, and Antidiabetic Properties . Pharmaceuticals (2023) [DOI]
- Bostan HB, Mehri S, Hosseinzadeh H. Toxicology effects of saffron and its constituents: a review. . Iranian Journal of Basic Medical Sciences (2017) [DOI]
- Aissa R, Ibourki M, Ait Bouzid H, Bijla L, Oubannin S, Sakar EH, Jadouali S, Hermansyah A, Goh KW, Ming LC, Bouyahya A, Gharby S. Phytochemistry, quality control and medicinal uses of Saffron (Crocus sativus L.): an updated review. . Journal of Medicine and Life (2023) [DOI]
- Lopresti AL, Drummond PD. Saffron (Crocus sativus) for depression: a systematic review of clinical studies and examination of underlying antidepressant mechanisms of action . Human Psychopharmacology: Clinical and Experimental (2014) [DOI]
- Zhang M, Zhou C, Huang S, Wang H, Shi T, Li M, Jing Z, Zhang X. Integrated geographical and ecological analysis reveals environmental drivers of Gardenia jasminoides distribution and chemical variation . Scientific Reports (2025) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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