September 25, 2026
Saffron is the most expensive spice in the world by weight, and for most of us it earns its keep in a risotto or a bowl of golden rice. But there's another reason it keeps turning up in conversation: a body of research suggesting it may influence mood. That's a big claim for a spice, so it's worth looking at what has actually been tested, what the results show, and where the gaps are. What follows is a summary of the evidence, not a treatment plan.
Why anyone links saffron to mood
Saffron has a long history as a mood-lifting ingredient in traditional Persian and Unani medicine, where it was used for low spirits, poor sleep and a range of other complaints. That history is interesting, but tradition isn't evidence on its own.
The modern interest comes from chemistry. Saffron stigmas contain crocins — the pigments that make the spice so vividly orange — along with picrocrocin and safranal, which carry much of its aroma. In laboratory and animal studies, these compounds show antioxidant and anti-inflammatory activity, and researchers have proposed that they may affect serotonin and other signalling pathways involved in mood. That's a plausible starting point, not proof. Plenty of compounds look promising in a petri dish and do nothing useful in people.
What the human studies actually look like
The trials that get cited are mostly small. A typical study takes a few dozen adults with mild-to-moderate low mood, gives them either a standardised saffron extract — often around 30mg a day — or a placebo, and follows them for six to eight weeks, measuring symptoms with standard rating scales. Some trials have compared saffron with a prescribed antidepressant rather than with a placebo.
When researchers pool these studies in reviews, the overall picture tilts towards saffron performing better than placebo, and in a few trials roughly comparably to medication. But the phrase "overall picture" is doing a lot of work there. Sample sizes are small, the trials are short, the extracts and doses vary, and several have been funded by companies that sell saffron supplements — a detail worth knowing when you read a confident headline.
The measurements matter
Mood trials rely on questionnaires and rating scales, which are useful but blunt instruments. A few points of improvement on a scale over eight weeks is a real finding; it is not the same as someone feeling substantially better at work, at home, or in their relationships. Keep that gap in mind whenever a study is described as showing that a spice "works".
Why that isn't the same as "saffron treats depression"
Depression isn't a single condition, and a trial isn't the same as real life. Participants in studies are assessed, included or excluded against specific criteria, and monitored throughout. Someone buying a supplement online is doing none of that. Even in the trials that showed a benefit, the effect was generally modest, and some well-run studies found no difference between saffron and placebo at all.
It's also worth separating the supplement from the spice in your kitchen. A generous pinch of saffron threads weighs well under a gram, and the amount of crocin that ends up in your rice is a small fraction of what trials have used. Eating saffron with dinner is a pleasure. It is not a dose.
So what can you reasonably take from the research?
- There is a credible biological rationale, along with some positive small trials.
- The evidence base is thin compared with what would be needed to call saffron a treatment.
- Results are inconsistent, and much of the work involves mild symptoms over short periods.
- Nothing here suggests saffron should replace prescribed treatment or talking therapy.
Other areas researchers have looked at
Mood isn't the only target. Small trials have examined saffron for premenstrual symptoms, sleep quality, and eye conditions such as age-related macular degeneration. Some of these results are intriguing, and the same caveats apply: small groups, short durations, and a need for replication before anyone can speak with confidence. If a supplement is being marketed on the strength of one 40-person trial, that tells you more about the marketing than about the evidence.
Safety, quality and the practical side
Culinary amounts of saffron are generally considered safe for most people. Larger medicinal doses are a different matter, and they aren't suitable for everyone. Before you consider a saffron supplement — particularly if you take any medication — speak to your GP or a pharmacist.
- Medication. Saffron may interact with prescribed antidepressants and other medicines. Never adjust or stop a prescribed medication in order to try a supplement.
- Pregnancy and breastfeeding. Large doses of saffron are traditionally avoided during pregnancy. Check with your midwife or doctor first.
- Bipolar disorder. Anything with a mood-related effect deserves a conversation with your clinician before you start taking it.
- Quality. Saffron is frequently adulterated. Powder is the easiest thing to fake; whole threads with a deep red colour and a honey-like aroma are a better bet, bought from a supplier you trust.
- Cost. Taking saffron by the gram every day is expensive. If a jar is remarkably cheap, ask what is actually in it.
Using saffron sensibly
If you enjoy cooking with saffron, keep doing it. Bloom a pinch in a tablespoon of warm water or milk for ten minutes before adding it to rice, tagines, custards or a simple yoghurt sauce. The colour and scent alone make a meal feel like an occasion, and there is something to be said for slow, deliberate cooking on a flat day.
If you're curious about the mood research and want to try a supplement, treat it as a decision to discuss with a professional rather than a purchase to make quietly. Keep a simple note of how you feel over a few weeks — sleep, energy, appetite, interest in things — so you're working from something more reliable than a general impression.
And if low mood has lasted more than a couple of weeks, is affecting your work, sleep or relationships, or comes with thoughts of harming yourself, speak to a GP. Saffron is a fascinating spice with a genuinely interesting evidence base. It isn't a substitute for proper care, and no honest reading of the research says otherwise.
Photo: Pinaki Panda / Pexels
