Saffron for Mood and Depression

Mood and Depression — scientific infographic poster

Depression is the use of saffron with the most human trial data behind it. Since 2004, randomized, double-blind trials have tested saffron — usually 30 mg per day — in adults with mild-to-moderate depression, against placebo and against the antidepressants imipramine, fluoxetine, citalopram, and sertraline. Most of the early trials came from one research group in Tehran. In those trials saffron did better than placebo and showed no statistically significant difference from the comparison drug over six to eight weeks, and several meta-analyses have pooled the results. The same reviews also report small samples, short follow-up, trials concentrated in one country, high heterogeneity in the newest pooled analysis, and evidence of publication bias. This page sets out both sides. Trial results are not evidence about stopping a prescribed antidepressant: decisions about medicines belong with the prescriber.


Table of Contents

  1. Saffron's Strongest Evidence Base
  2. The Active Compounds: Crocin, Crocetin, Safranal
  3. How Saffron May Affect Mood
  4. Saffron vs Placebo: The Randomized Trials
  5. Head-to-Head With Antidepressants
  6. What the Meta-Analyses Show
  7. Add-On Use and SSRI Side Effects
  8. Standardized Extracts and Newer Trials
  9. Doses and Durations Used in the Trials
  10. Limitations of the Evidence
  11. Safety Findings
  12. Key Research Papers
  13. External Authoritative Resources
  14. Connections
  15. Featured Videos

Saffron's Strongest Evidence Base

Most herbal remedies rest on tradition, laboratory data, and a few small studies. For depression, saffron has been tested in randomized, double-blind trials (neither patient nor researcher knew who got saffron), with a placebo or an antidepressant as the comparison, using validated rating scales such as the Hamilton Depression Rating Scale (HAM-D) and the Beck Depression Inventory (BDI).

Iran produces about 90 percent of the world's saffron and, as the 2013 meta-analysis by Hausenblas and colleagues notes, generates most of the research into its medical uses. The first trials came from the psychiatric research center at Roozbeh Hospital, Tehran University of Medical Sciences, led by Shahin Akhondzadeh, starting in 2004. Akhondzadeh is an author on every one of the five trials pooled in that meta-analysis, which describes them as single-center trials run in the same clinical setting in Iran; its authors called for larger trials by research teams outside Iran. Later trials came from other Iranian centers (Mashhad, Hamadan), from Australia, and elsewhere.

The pooled result is that, in adults with mild-to-moderate depression, saffron at about 30 mg per day reduced depression scores more than placebo, and the trials comparing it with an antidepressant found no statistically significant difference. Those trials did not include people with severe or treatment-resistant depression, and none tested replacing an antidepressant in people already stable on one.

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The Active Compounds: Crocin, Crocetin, Safranal

Saffron threads are the dried stigmas of the flower Crocus sativus. Their color, bitterness, and aroma come from a few families of compounds, which laboratory studies have examined for effects related to mood:

Supplements used in trials are usually standardized to a stated content of these markers (for example, a minimum percentage of crocins, or a fixed amount of safranal), so that each dose delivers a consistent amount. Standardization and quality are covered on the sources, dosing, and safety page.

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How Saffron May Affect Mood

The mechanism is not established. Reviews by Lopresti and Drummond (2014) and Matraszek-Gawron and colleagues (2022) summarize several proposed pathways, drawn almost entirely from cell and animal studies:

  1. Monoamine reuptake. In laboratory studies crocin inhibits the reuptake of dopamine and noradrenaline, and safranal inhibits the reuptake of serotonin — the same broad targets as many conventional antidepressants.
  2. Other receptor effects. The 2022 review also lists NMDA-receptor antagonism and action at GABA receptors as proposed mechanisms.
  3. Anti-inflammatory and antioxidant action. In rodent models of depression, crocin lowered inflammatory markers such as TNF-alpha and interleukin-6; the reviews link the antidepressant and neuroprotective effects to anti-inflammatory and antioxidant activity.
  4. Neurotrophic effects. Animal studies report increased brain-derived neurotrophic factor (BDNF), a protein tied to mood disorders, in the hippocampus after saffron or crocin.

What the human trials measured is a change in depression scores. The pathways above are proposed explanations for that change, not demonstrated causes of it in people.

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Saffron vs Placebo: The Randomized Trials

Two early placebo-controlled trials set the template. Both were run by the Tehran group:

Akhondzadeh and colleagues (2005), Phytotherapy Research. Forty adult outpatients with major depression (baseline HAM-D score of at least 18) were randomized to saffron stigma 30 mg per day, taken in two doses, or placebo for six weeks at a single center. The saffron group did significantly better on the Hamilton scale (p < 0.001), and side effects did not differ significantly between the groups. The authors wrote that a large-scale trial was justified.

Moshiri and colleagues (2006), Phytomedicine. This trial tested the petals of the saffron flower (a cheaper part of the plant than the stigma) at 30 mg per day against placebo for six weeks in forty adults with mild-to-moderate depression. The petal extract also did better than placebo on the Hamilton scale (p < 0.001).

Later placebo-controlled trials tested saffron in other groups and other countries, with mixed results on different scales; the meta-analyses below summarize them.

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Head-to-Head With Antidepressants

Saffron has also been compared directly with prescription antidepressants. In each of these trials the abstract reports no statistically significant difference between the two arms:

Table of six randomized trials that compared saffron with an antidepressant, showing for each the comparison drug and daily dose, the saffron dose, the number of patients randomized, and the reported P value for the difference between arms; none found a statistically significant difference, and none had a placebo arm. SAFFRON VERSUS AN ANTIDEPRESSANT: SIX TRIALS As reported in each trial's abstract · 6 weeks unless marked · every trial was run in Iran TRIAL COMPARISON DRUG SAFFRON PATIENTS DIFFERENCE Akhondzadeh 2004 imipramine 100 mg 30 mg 30 P = 0.09 Noorbala 2005 fluoxetine 20 mg 30 mg 40 P = 0.71 Basti 2007 (eight weeks) fluoxetine 20 mg 30 mg (petal) 40 P = 0.84 Shahmansouri 2014 fluoxetine 40 mg 30 mg 40 P = 0.62 Ghajar 2017 citalopram 40 mg 30 mg 66 P = 0.984 Ahmadpanah 2019 sertraline 100 mg 60 mg 50 no advantage No trial found a statistically significant difference between saffron and the drug. That is not the same as proof of equal effect: the abstracts report no pre-specified non-inferiority margin, no trial had a placebo arm, and each enrolled between 30 and 66 patients. Shahin Akhondzadeh of Tehran University of Medical Sciences is an author on all six. Doses are per day. Patients = number randomized (Ghajar 2017: 60 finished).

Figures as reported in each trial's PubMed abstract.

These results are often summarized as "non-inferiority", and the 2019 meta-analysis by Tóth and colleagues used that word for the pooled comparison. The limits matter. The abstracts do not report a pre-specified non-inferiority margin, so what they report is the absence of a statistically significant difference, which is not the same as showing the two treatments are equal. With 30 to 66 patients per trial, a real difference could go undetected. None of the comparisons included a placebo arm, so they cannot show that either treatment beat placebo in that sample. The drug doses ranged from a starting dose (fluoxetine 20 mg per day) to higher doses (fluoxetine 40 mg, citalopram 40 mg, sertraline 100 mg). Every trial lasted six to eight weeks, was run in Iran, and shared one senior author, and none enrolled people with severe depression.

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What the Meta-Analyses Show

Meta-analyses pool the trials to estimate an overall effect. They differ in which trials they include, and they report the evidence's weaknesses as well as the effect:

The early analyses, built on a handful of trials from one group, found large effects with no heterogeneity. The larger and more recent analyses still find an effect on self-rated scales, but report publication bias (Marx 2019), very high heterogeneity, and no significant effect on clinician-rated scales (Mahmoudi 2026; Musazadeh 2022). None of the trials cited on this page carries a retraction or an expression of concern in PubMed or Crossref (checked October 2026).

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Add-On Use and SSRI Side Effects

Some trials looked at saffron alongside conventional treatment rather than instead of it:

As an add-on. Talaei and colleagues (2015), a pilot trial in Mashhad, gave 40 patients with major depressive disorder an SSRI (fluoxetine, sertraline, or citalopram) plus either crocin 30 mg per day or placebo for four weeks. The crocin group improved significantly more on the self-rated Beck depression and anxiety inventories. The authors listed poor compliance, the short trial period, the small sample, and self-report measures as the main limitations. In Australia, Lopresti and colleagues (2019) enrolled 160 adults with persistent depression despite an antidepressant and gave them a standardized saffron extract (14 mg twice daily) or placebo for eight weeks: the clinician-rated MADRS score fell 41% with saffron and 21% with placebo, but the self-rated MADRS fell 27% and 26%, and the authors called the results conflicting. That trial was funded by the extract's manufacturer.

For SSRI-related sexual side effects. Sexual dysfunction is a common side effect of SSRIs. Modabbernia and colleagues (2012) randomized 36 married men whose depression was stabilized on fluoxetine to saffron 15 mg twice daily or placebo for four weeks; 30 finished. Saffron improved erectile function, intercourse satisfaction, and total scores more than placebo, but not orgasmic function, overall satisfaction, or desire. A companion trial by Kashani and colleagues (2013) in 38 women taking fluoxetine 40 mg per day found improvement in the total sexual-function score, including arousal, lubrication, and pain, but not in desire, satisfaction, or orgasm. Both trials came from the Tehran group.

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Standardized Extracts and Newer Trials

Much of the newer research outside Iran uses one standardized saffron extract with a fixed content of active compounds per dose. Saffron sold as threads varies in strength with grade and storage, and is often adulterated, as the safety page details.

These trials extend the research beyond diagnosed major depression to people with low mood, stress, and mild anxiety, measured mostly by self-report. Their manufacturer funding is a recognized source of bias, which is why reviews weigh them alongside the academic trials.

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Doses and Durations Used in the Trials

The doses used across the depression trials are consistent:

Saffron can interact with other medicines (see Safety Findings below). Decisions about supplements, especially alongside a prescribed antidepressant, belong with a doctor or pharmacist.

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Limitations of the Evidence

The reviews above name the same weaknesses repeatedly:

The positive signal on self-rated depression scores is repeated across many trials, but these limitations are why the newest review asks for high-quality trials.

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Safety Findings

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Key Research Papers

  1. Akhondzadeh S, Tahmacebi-Pour N, Noorbala AA, et al. (2005). Crocus sativus L. in the treatment of mild to moderate depression: a double-blind, randomized and placebo-controlled trial. Phytotherapy Research — PubMed PMID: 15852492
  2. Akhondzadeh S, Fallah-Pour H, Afkham K, et al. (2004). Comparison of Crocus sativus L. and imipramine in the treatment of mild to moderate depression: a pilot double-blind randomized trial. BMC Complementary and Alternative Medicine — PubMed PMID: 15341662
  3. Noorbala AA, Akhondzadeh S, Tahmacebi-Pour N, et al. (2005). Hydro-alcoholic extract of Crocus sativus L. versus fluoxetine in the treatment of mild to moderate depression. Journal of Ethnopharmacology — PubMed PMID: 15707766
  4. Moshiri E, Basti AA, Noorbala AA, et al. (2006). Crocus sativus L. (petal) in the treatment of mild-to-moderate depression: a double-blind, randomized and placebo-controlled trial. Phytomedicine — PubMed PMID: 16979327
  5. Shahmansouri N, Farokhnia M, Abbasi SH, et al. (2014). 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. Journal of Affective Disorders — PubMed PMID: 24289892
  6. Ghajar A, Neishabouri SM, Velayati N, et al. (2017). Crocus sativus L. versus citalopram in the treatment of major depressive disorder with anxious distress: a double-blind, controlled clinical trial. Pharmacopsychiatry — PubMed PMID: 27701683
  7. Ahmadpanah M, Ramezanshams F, Ghaleiha A, et al. (2019). Crocus sativus L. (saffron) versus sertraline on symptoms of depression among older people with major depressive disorders. Psychiatry Research — PubMed PMID: 31669837
  8. Talaei A, Hassanpour Moghadam M, Sajadi Tabassi SA, et al. (2015). Crocin, the main active saffron constituent, as an adjunctive treatment in major depressive disorder: a randomized, double-blind, placebo-controlled pilot clinical trial. Journal of Affective Disorders — PubMed PMID: 25484177
  9. Modabbernia A, Sohrabi H, Nasehi AA, et al. (2012). Effect of saffron on fluoxetine-induced sexual impairment in men: randomized double-blind placebo-controlled trial. Psychopharmacology — PubMed PMID: 22552758
  10. Lopresti AL, Drummond PD, Inarejos-García AM, Prodanov M (2018). affron, a standardised extract from saffron for the treatment of youth anxiety and depressive symptoms: a randomised, double-blind, placebo-controlled study. Journal of Affective Disorders — PubMed PMID: 29510352
  11. Kell G, Rao A, Beccaria G, et al. (2017). affron a novel saffron extract improves mood in healthy adults over 4 weeks in a double-blind, parallel, randomized, placebo-controlled clinical trial. Complementary Therapies in Medicine — PubMed PMID: 28735826
  12. Hausenblas HA, Saha D, Dubyak PJ, Anton SD (2013). Saffron (Crocus sativus L.) and major depressive disorder: a meta-analysis of randomized clinical trials. Journal of Integrative Medicine — PubMed PMID: 24299602
  13. Tóth B, Hegyi P, Lantos T, et al. (2019). The efficacy of saffron in the treatment of mild to moderate depression: a meta-analysis. Planta Medica — PubMed PMID: 30036891
  14. Lopresti AL, Drummond PD (2014). Saffron (Crocus sativus) for depression: a systematic review of clinical studies and examination of underlying antidepressant mechanisms of action. Human Psychopharmacology — PubMed PMID: 25384672
  15. Akhondzadeh Basti A, Moshiri E, Noorbala AA, et al. (2007). Comparison of petal of Crocus sativus L. and fluoxetine in the treatment of depressed outpatients: a pilot double-blind randomized trial. Progress in Neuro-Psychopharmacology and Biological Psychiatry — PubMed PMID: 17174460
  16. Marx W, Lane M, Rocks T, et al. (2019). Effect of saffron supplementation on symptoms of depression and anxiety: a systematic review and meta-analysis. Nutrition Reviews — PubMed PMID: 31135916
  17. Yang X, Chen X, Fu Y, et al. (2018). Comparative efficacy and safety of Crocus sativus L. for treating mild to moderate major depressive disorder in adults: a meta-analysis of randomized controlled trials. Neuropsychiatric Disease and Treatment — PubMed PMID: 29849461
  18. Khaksarian M, Behzadifar M, Behzadifar M, et al. (2019). The efficacy of Crocus sativus (Saffron) versus placebo and Fluoxetine in treating depression: a systematic review and meta-analysis. Psychology Research and Behavior Management — PubMed PMID: 31118846
  19. Dai L, Chen L, Wang W (2020). Safety and efficacy of saffron (Crocus sativus L.) for treating mild to moderate depression: a systematic review and meta-analysis. Journal of Nervous and Mental Disease — PubMed PMID: 32221179
  20. Musazadeh V, Zarezadeh M, Faghfouri AH, et al. (2022). Saffron, as an adjunct therapy, contributes to relieve depression symptoms: an umbrella meta-analysis. Pharmacological Research — PubMed PMID: 34757208
  21. Shafiee A, Jafarabady K, Seighali N, et al. (2025). Effect of saffron versus selective serotonin reuptake inhibitors (SSRIs) in treatment of depression and anxiety: a meta-analysis of randomized controlled trials. Nutrition Reviews — PubMed PMID: 38913392
  22. Mahmoudi R, Mohammadi-Sartang M, Servatyari K, Rafieipour N (2026). Effect of saffron on depression, anxiety and mood disorder: a GRADE assessed systematic review and meta-analysis of 34 randomized controlled trials. Nutritional Neuroscience — PubMed PMID: 41693488
  23. Matraszek-Gawron R, Chwil M, Terlecki K, Skoczylas MM (2022). Current knowledge of the antidepressant activity of chemical compounds from Crocus sativus L. Pharmaceuticals — PubMed PMID: 36678554
  24. Kashani L, Raisi F, Saroukhani S, et al. (2013). Saffron for treatment of fluoxetine-induced sexual dysfunction in women: randomized double-blind placebo-controlled study. Human Psychopharmacology — PubMed PMID: 23280545
  25. Lopresti AL, Smith SJ, Hood SD, Drummond PD (2019). Efficacy of a standardised saffron extract (affron®) as an add-on to antidepressant medication for the treatment of persistent depressive symptoms in adults: a randomised, double-blind, placebo-controlled study. Journal of Psychopharmacology — PubMed PMID: 31475623
  26. Lopresti AL, Smith SJ, Marx W, et al. (2025). An examination into the effects of a saffron extract (Affron) on mood and general wellbeing in adults experiencing low mood: a randomized, double-blind, placebo-controlled trial. Journal of Nutrition — PubMed PMID: 40414301
  27. Fountoulakis KN (2018). Is really Crocus sativus as effective as citalopram in the treatment of depression? [letter]. Pharmacopsychiatry — PubMed PMID: 28351080
  28. Bostan HB, Mehri S, Hosseinzadeh H (2017). Toxicology effects of saffron and its constituents: a review. Iranian Journal of Basic Medical Sciences — PubMed PMID: 28293386
  29. Alshdefat A, Ayed A, Aqtam I, et al. (2026). Saffron and pregnancy: cultural practices, beliefs, and safety evidence: an integrative review. Journal of Evidence-Based Integrative Medicine — PubMed PMID: 42186868

PubMed Topic Searches

  1. PubMed: Saffron depression randomized trials
  2. PubMed: Saffron vs fluoxetine
  3. PubMed: Saffron depression meta-analyses
  4. PubMed: Crocin antidepressant mechanism
  5. PubMed: Saffron anxiety and mood

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External Authoritative Resources

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Connections

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