Saffron, the dried red stigma of the Crocus sativus flower, is one of the few herbal supplements with randomized-trial support for mood. For mild to moderate depression, about 30 mg a day of a standardized extract has beaten placebo and, in head-to-head trials, matched the antidepressants fluoxetine and imipramine, with further signals for anxiety, premenstrual syndrome, and the sexual side effects that some people get on an SSRI. The caveats are about size and setting.
Most of the trials are small, run only six to eight weeks, and come from a few research groups, most of them in Iran, and some carried ties to saffron growers or extract makers, so the consistent signal still awaits larger independent replication. Saffron is well tolerated at the studied dose, very high doses are toxic, and it does not treat severe depression on its own. Use it alongside proper care for low mood.
Findings & Outcomes
What It Is
Saffron is the dried red stigma of the saffron crocus, Crocus sativus. It is the most expensive spice in the world by weight, because each flower gives only three threads and they are picked by hand. Across Persia, the Mediterranean, and South Asia it has been a cooking spice, a dye, and a medicine for thousands of years, and the use for low mood is an old one.
The supplement sold for mood is a standardized extract of the same stigma. Almost every trial used about 30 mg a day, usually 15 mg twice daily, of an extract standardized to its crocin and safranal content. Those two compounds carry saffron's color and aroma, and the laboratory work ties the mood effect to them. Because the spice is so costly, it is also among the most adulterated on earth, often cut with dyed safflower or other plant fiber, so the product worth buying is one calibrated to its actives.
What It Does
The strongest strand is mild to moderate depression, and it is the reason to consider saffron at all. More trials have tested about 30 mg a day there than for any other use, they include both placebo-controlled and head-to-head designs, and two meta-analyses have pooled them. That is why depression leads the findings below.
The other uses rest on thinner evidence. Premenstrual syndrome, anxiety, and the sexual side effects of SSRIs each rest on one trial or a few, again at about 30 mg a day, and each points the same direction as the depression work. They carry less weight than the depression evidence.
Each finding below is graded at the strength of its own evidence.
The Research & Studies
Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.
Mood & stress
About 30 mg a day of saffron beat placebo and matched standard antidepressants for mild to moderate depression
When the small saffron trials are added up, taking around 30 milligrams a day eased depression clearly better than a dummy pill and roughly as well as common antidepressants like fluoxetine and imipramine.
Pooling the small randomized trials, about 30 mg a day of saffron lowered depression scores substantially more than placebo, with a large standardized effect, and by about as much as the standard antidepressants it was tested against, over six to eight weeks in mild to moderate depression. Measured in: Adults with mild to moderate depression across roughly five to eleven randomized trials pooled in two meta-analyzes. The pooled trials are small, most enrolling forty patients or fewer, run only six to eight weeks, and the great majority were conducted in Iran by overlapping research groups, so the consistent signal still awaits larger and independent replication.
Who this may not transfer to:The pooled trials enrolled both women and men with mild to moderate depression; the effect was consistent across the mixed samples, though most participants were recruited in Iran.
The studies · 2
Hausenblas et al., Saffron (Crocus sativus L.) and major depressive disorder: a meta-analysis of randomized clinical trials · J Integr Med 2013;11(6):377-383
Tóth et al., The Efficacy of Saffron in the Treatment of Mild to Moderate Depression: A Meta-analysis · Planta Med 2019;85(1):24-31
Saffron lowered depression scores more than placebo in a six-week trial of 40 adults
Against a dummy pill, saffron brought depression scores down significantly more over six weeks in a small controlled trial.
In a six-week double-blind trial in 40 adults with mild to moderate depression, 30 mg a day of saffron stigma extract produced a significantly greater fall in Hamilton depression scores than placebo. Measured in: 40 adults with mild to moderate depression. A single small trial of 40 people over six weeks; it is one of the placebo-controlled anchors behind the pooled estimate rather than definitive on its own.
Who this may not transfer to:The trial enrolled both women and men; it was small and single-center in Iran, so it establishes the direction of effect rather than its precise size.
The study · 1
Akhondzadeh et al., Crocus sativus L. in the treatment of mild to moderate depression: a double-blind, randomized and placebo-controlled trial · Phytother Res 2005;19(2):148-151
Premenstrual symptoms at least halved in 76% on saffron versus 8% on placebo
For premenstrual syndrome, most women taking saffron saw their symptoms at least halve over two cycles, compared with very few on a dummy pill.
In a double-blind trial in 50 women aged 20 to 45 with premenstrual syndrome, 30 mg a day of saffron over two menstrual cycles produced at least a 50% reduction in symptoms in 76% of the saffron group versus 8% on placebo, with a matching fall in Hamilton depression scores. Measured in: 50 women aged 20 to 45 with premenstrual syndrome, over two menstrual cycles. A single small trial of 50 women over two cycles, so a strong within-trial result that has not yet been widely replicated.
Who this may not transfer to:Premenstrual syndrome occurs only in people who menstruate, so there is no other-sex population for this outcome; the finding does not transfer beyond it.
The study · 1
Agha-Hosseini et al., Crocus sativus L. (saffron) in the treatment of premenstrual syndrome: a double-blind, randomised and placebo-controlled trial · BJOG 2008;115(4):515-519
Saffron matched fluoxetine and imipramine for depression in small head-to-head trials
Head to head, saffron worked about as well as the antidepressants fluoxetine and imipramine for people with mild to moderate depression, with no clear winner between them.
In separate double-blind trials, 30 mg a day of saffron lowered Hamilton depression scores about as much as fluoxetine 20 mg a day and about as much as imipramine 100 mg a day, each over six weeks, with no statistically significant difference between saffron and the drug in either. Measured in: Adults with mild to moderate depression: 40 in the fluoxetine comparison, 30 in the imipramine comparison. These are small trials with no placebo arm, so they show saffron kept pace with the drug but cannot by themselves rule out that both did little, which is why the placebo-controlled trials matter alongside them.
Who this may not transfer to:Both head-to-head trials enrolled women and men; the samples were small and recruited in Iran, so the equivalence is best read as suggestive rather than definitive.
The studies · 2
Noorbala et al., Hydro-alcoholic extract of Crocus sativus L. versus fluoxetine in the treatment of mild to moderate depression · J Ethnopharmacol 2005;97(2):281-284
Akhondzadeh et al., Comparison of Crocus sativus L. and imipramine in the treatment of mild to moderate depression: a pilot double-blind randomized trial · BMC Complement Altern Med 2004;4:12
Anxiety And Stress
Saffron eased anxiety symptoms, not just low mood, at about 30 mg a day
Pooled across trials, saffron eased anxiety symptoms, not just low mood, in people who had both.
In a systematic review and meta-analysis of randomized trials, saffron supplementation reduced anxiety symptoms as well as depressive symptoms compared with placebo, at the usual 30 mg a day dose, in people carrying both together. Measured in: Adults with depressive and anxiety symptoms across the randomized trials pooled in the review. The anxiety trials are fewer and smaller than the depression ones and mostly measured anxiety as a secondary outcome, so the anxiety signal is real but thinner than the depression evidence.
Who this may not transfer to:The pooled trials enrolled women and men; as with the depression work, most were small and conducted in Iran.
The study · 1
Marx et al., Effect of saffron supplementation on symptoms of depression and anxiety: a systematic review and meta-analysis · Nutr Rev 2019;77(8):557-571
Sexual Function
Adding saffron improved sexual function in 34 women with fluoxetine-related dysfunction
Women whose sexual function had been dulled by the antidepressant fluoxetine improved when saffron was added, more than with a dummy pill.
In a four-week double-blind trial in 34 women whose major depression was stabilized on fluoxetine but who had sexual dysfunction, adding 30 mg a day of saffron improved total Female Sexual Function Index scores, with gains in arousal, lubrication and pain, significantly more than placebo. Measured in: 34 women with fluoxetine-related sexual dysfunction, depression stabilized on fluoxetine. A single four-week trial of 34 women; it measured a drug side effect in people already stabilized on fluoxetine, so it speaks to that specific situation rather than to sexual function in general.
Who this may not transfer to:A parallel trial in men with fluoxetine-related sexual impairment found the same direction of benefit, so the effect is not confined to women.
The study · 1
Kashani et al., Saffron for treatment of fluoxetine-induced sexual dysfunction in women: randomized double-blind placebo-controlled study · Hum Psychopharmacol 2013;28(1):54-60
Adding saffron improved erectile function in 36 men on fluoxetine
Men whose erections had been affected by the antidepressant fluoxetine improved when saffron was added, more than with a dummy pill.
In a four-week double-blind trial in 36 men whose major depression was stabilized on fluoxetine but who had erectile dysfunction, adding 30 mg a day of saffron improved International Index of Erectile Function scores, including erectile function and intercourse satisfaction, significantly more than placebo. Measured in: 36 men with fluoxetine-related erectile dysfunction, depression stabilized. A single four-week trial of 36 men; it measured a drug side effect in people already stabilized on treatment, so it speaks to that specific situation rather than to erectile function in general.
Who this may not transfer to:A parallel trial in women with fluoxetine-related sexual dysfunction found the same direction of benefit, so the effect is not confined to men.
The study · 1
Modabbernia et al., Effect of saffron on fluoxetine-induced sexual impairment in men: randomized double-blind placebo-controlled trial · Psychopharmacology (Berl) 2012;223(4):381-388
How it works
Crocin and safranal appear to nudge the serotonin system the way antidepressants do
The mood effect is thought to come mostly from saffron's compounds crocin and safranal, which seem to nudge the serotonin system much as antidepressants do while also calming inflammation and the stress response.
Laboratory and animal work attributes saffron's antidepressant signal chiefly to crocin and safranal, which appear to slow serotonin reuptake, act as antioxidants and anti-inflammatories, dampen an overactive hypothalamic-pituitary-adrenal stress axis, and offer some neuroprotection, rather than to any single pathway. This is a mechanistic account drawn largely from laboratory and animal studies, so it explains why the clinical findings are plausible but is not itself clinical proof of how saffron works in people.
The study · 1
Lopresti & Drummond, Saffron (Crocus sativus) for depression: a systematic review of clinical studies and examination of underlying antidepressant psychopharmacological actions · Hum Psychopharmacol 2014;29(6):517-527
How Firm Is It
The direction of effect is steady. Across the randomized work on mild to moderate depression, saffron beats placebo and keeps pace with fluoxetine and imipramine, trial after trial. What keeps the evidence at moderate is the size and setting of those trials:
- Most enrolled forty patients or fewer and ran only six to eight weeks.
- The great majority were conducted in Iran, several by the overlapping research groups that first studied the spice.
- Some were funded by or tied to saffron growers and extract makers.
- Trials that show no effect can go unpublished, and a commercial stake in the result adds a bias in the same direction, both raising a pooled estimate.
None of that makes a repeated finding wrong, and dismissing good work for its country of origin would be its own error. This is a promising, repeatable signal that still awaits larger, independent replication outside those groups, which is why it sits at moderate rather than strong. The depression guide shows where saffron sits among the options.
Saffron is for mild to moderate low mood, as an add-on or for someone who prefers a botanical. It does not treat severe depression on its own, and it belongs within the care a person is already getting.
How It Works
The mechanism is not settled, and the laboratory work points to more than one pathway. Crocin and safranal, the two actives, appear to slow the reuptake of serotonin and related messengers, the serotonin system that standard antidepressants act on, which is the most cited reason saffron tracks so closely with fluoxetine and imipramine in the head-to-head trials. The same compounds are antioxidant and anti-inflammatory, they appear to calm an overactive stress-hormone axis, and animal work suggests they protect nerve cells, any of which could contribute to a mood effect.
A plausible mechanism only makes the clinical findings easier to believe. The reason to take saffron for mood is the trials that measured mood directly. Where low mood overlaps with worry, the anxiety guide covers the same trials, which measured both together.
Ways to Do It
Saffron is unusual among supplements because the food and the medicine are the same plant, so there is a cheap way in before any bottle. Match what you take to what you want from it, keep to the dose the trials used, and if you are being treated for depression, bring it into that care.
Saffron is a food first, and a few threads steeped in warm liquid flavor a dish for very little. This does not deliver the studied 30 mg a day of standardized extract, so treat it as a pleasant, low-stakes way to live with the spice. It is the natural starting point for anyone curious before committing to a supplement.
This is the form behind essentially all of the mood evidence: a stigma extract standardized to its crocin and safranal content, taken as about 30 mg a day, usually 15 mg twice daily. Check the label for the standardization figure, not just the milligrams of powder, since the studied products were calibrated to their actives. Give it the six to eight weeks the trials ran before judging it.
Saffron is one of the most adulterated spices on earth because it is so costly, so buy from a supplier that publishes third-party testing and its crocin and safranal figures. A product that names its standardization is one guard against paying for dyed fiber that is not saffron at all, and that figure is the one quality signal you can check yourself.
If you are being treated for depression, saffron belongs in a conversation with the clinician managing that care. Some trials used it as an add-on to an antidepressant, including to ease the sexual side effects, and because saffron acts on the same serotonin system, combining serotonergic drugs is a medical decision. Keep it a complement to proper care for a serious condition.
Go Deeper
- Depression: where saffron sits among the options for low mood, and what the evidence says works alongside it.
- Anxiety: the other half of what saffron was tested on, since the trials measured both together.
- Period pain: the menstrual and premenstrual side of saffron as a Blood-moving herb.
- Menopause and hot flashes: another phase of women's health where mood and the cycle overlap.
The Chinese Medicine View
Saffron is a herb in the Chinese materia medica, which makes this bridge more direct than for most supplements, and it means the tradition's cautions carry weight. It is Xi Hong Hua (西紅花), also called Fan Hong Hua or Zang Hong Hua, the precious imported saffron, and it should not be confused with the far commoner and cheaper Hong Hua, safflower, which is a different plant.
The tradition reads saffron as sweet and cooling, entering the Heart and Liver. Its classical work is to invigorate the Blood and dispel stasis, to cool the Blood and clear heat, and to move constraint and calm the spirit, easing the stifled, oppressed low mood the tradition calls Liver Qi constraint. The same herb was reached for stuck, heavy mood in one system and now tests well for depression in another. It is a point of contact between the two accounts, held as that and nothing more.
As a lens, the tradition also sorts who saffron suits. A low mood read as constraint and Blood stasis, the frustrated, tense, stuck presentation with dark or clotted menstrual blood, is where the tradition would reach for saffron, and it sits close to the modern showing in premenstrual syndrome. Someone instead depleted and cold, tired and pale with scanty pale periods, fits a Blood and Qi deficiency pattern, and a strong Blood-moving herb is not the first thing that tradition would hand them.
The two views agree most firmly on caution. Because saffron moves the Blood strongly, the tradition contraindicates it in pregnancy and in anyone prone to heavy bleeding, and treats it as a potent herb to dose with respect. The same holds in the modern safety picture below, where pregnancy is the firm no and high doses are toxic.
Cautions For This Practice
Everything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.
Saffron at about 30 mg a day was as well tolerated as placebo
Across the randomized trials pooled in the systematic review, saffron at about 30 mg a day was well tolerated over the six to eight weeks studied, with adverse events not significantly different from placebo. Good short-term tolerability at 30 mg a day does not extend to high doses, which are toxic, or to pregnancy, where saffron can stimulate the uterus and should be avoided beyond food amounts.Marx et al., Effect of saffron supplementation on symptoms of depression and anxiety: a systematic review and meta-analysis
Well tolerated at the studied dose
Across the randomized trials, saffron at about 30 mg a day was well tolerated over the six to eight weeks studied, with side effects close to placebo. That reassurance covers the studied dose and duration only. Tolerability past a couple of months, and in pregnancy, was not assessed.
Avoid saffron in pregnancy
Higher doses of saffron can stimulate the uterus and have been used traditionally to bring on menstruation, and it is treated as unsafe in pregnancy in both the herbal tradition and modern cautions. Keep to culinary amounts in food at most if pregnant, and do not take the supplement. It is also best avoided while breastfeeding, where safety has not been studied.
High doses are toxic
The benefit belongs to about 30 mg a day, and more has not been shown to help. Saffron is toxic in overdose: doses of several grams cause vomiting, bleeding, and worse, far above any supplement amount. Take the studied dose and stop there.
It acts on the serotonin system, so watch combinations
Because saffron appears to work partly through serotonin, the pathway most antidepressants use, taking it with an SSRI, an SNRI or another serotonergic drug is a decision for the clinician managing that treatment. Some trials combined them deliberately and safely under supervision, which is the model to follow. Tell whoever prescribes your medication that you are taking it.
Saffron is for mild to moderate depression only
Saffron performed well for mild to moderate depression, and that is the limit of the claim. It is not a treatment for severe depression, and it is not a substitute for care when mood is seriously low or when there are thoughts of self-harm. If low mood is deep or persistent, see a clinician, and let saffron be one possible part of the plan.
Quality and adulteration
Saffron is among the most adulterated spices on earth because it is so costly, often cut with safflower, dyed fibers, or other plant material. A supplement standardized to its crocin and safranal content, from a supplier that publishes that figure, is the surest guard you have against paying for filler.
Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.
Common Questions
Does saffron really work for depression?
For mild to moderate depression, the evidence is better than most people expect from a spice. Across several small randomized trials, about 30 mg a day lowered depression scores more than placebo and about as much as fluoxetine or imipramine over six to eight weeks, and the two meta-analyses that pooled them agreed. The catch is size and setting: the trials are small and mostly conducted in Iran, so a consistent, promising signal still awaits larger independent replication. It suits mild to moderate low mood, not severe depression, and belongs alongside proper care.
How much saffron should I take, and in what form?
Almost every trial used about 30 mg a day, usually 15 mg twice daily, of a stigma extract standardized to its crocin and safranal content. That is the dose to match, and more has not been shown to help. Cooking with a few threads is a pleasant way to live with the spice but will not reach the studied amount. Check a supplement label for the standardization figure, not just the milligram weight, and give it the six to eight weeks the trials ran before deciding.
Is saffron as good as an antidepressant?
In the head-to-head trials it kept pace. Saffron at 30 mg a day lowered depression scores about as much as fluoxetine 20 mg a day and imipramine 100 mg a day, with no clear winner in either small trial. The limit is that these were small trials without a placebo arm, in mild to moderate depression. They show saffron matched the drug, but not that either did a great deal, which is why the placebo-controlled trials matter alongside them. For severe depression none of this applies, and standard treatment is the answer.
Is saffron safe to take every day?
At about 30 mg a day it was well tolerated in the trials, with side effects close to placebo over the weeks they ran. The firm exception is pregnancy, where saffron should be avoided beyond food amounts because it can stimulate the uterus. High doses are toxic, so there is no case for taking more than the studied amount, and because it acts on the serotonin system, anyone on an antidepressant should clear it with their clinician first. The long-term picture past a couple of months has not been studied.
Can I take saffron with my antidepressant?
That is a question for the clinician who prescribes it, not a decision to make alone. Saffron appears to work partly through serotonin, the same pathway most antidepressants use, so combining them adds to that effect. Some trials did exactly this on purpose and under supervision, including to ease the sexual side effects of an SSRI, and it was well tolerated. So tell whoever manages your medication that you want to take saffron, and let that combination be their call.
Explore Related
Other pages this one connects to, by the evidence they share, the outcomes they touch, and the ground they cover.
All 11 sources on this page independently checked and cross-referenced.
Thomas Dehli, Founder & Editor, Sacred Lotus
Sacred Lotus has published Chinese medicine reference material since 2001. Integrative pages are held to the same standard as the herb and formula library: cite the source, grade the claim at its real strength, and say where the research has not looked. This page is educational and it is not medical advice. Last reviewed and updated August 9, 2026.
Evidence strength
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