Saffron Side Effects: Safe Doses, Who Should Avoid It, and What Happens If You Take Too Much

Saffron is safe for healthy adults at every dose you will meet in a kitchen and at the 30 mg a day used in clinical trials. Side effects at that level are mild and uncommon. Trouble starts only at around 1.5 g a day, fifty times a supplement dose and more than a gram-sized vial, where nausea, dizziness, low blood pressure and a yellow tinge to the skin have been reported, and becomes serious at 5 g and above.

That is the short version. The long version matters for a few groups: pregnant women, people with bipolar disorder, anyone on antidepressants or blood thinners, and anyone with a plant allergy. This guide sets out what the evidence says about each, what an overdose looks like, how the numbers translate into threads, and the adulteration problem that is the real safety risk with cheap saffron.

This article summarises published research and is not medical advice. If you are being treated for a condition, ask your doctor before taking saffron in more than culinary amounts. Our disclaimer explains how we handle health topics.

Three dose ranges

It helps to think of saffron in three bands.

Culinary: 5 to 40 threads a day, roughly 10 to 90 mg. A pinch in rice, a few threads in milk or tea. This is how most people have consumed saffron for three thousand years. There are no documented adverse effects at this level in healthy adults.

Supplement: 28 to 30 mg a day, about 12 to 15 threads or a standardised extract. The dose used in most trials for mood, sleep and PMS. Side effects in those trials are mild, infrequent and usually no more common than with placebo. Saffron benefits: what the research says covers what those trials found.

Excess: 1.5 g a day and above. Reviews of saffron toxicology put the threshold for adverse effects at about 1.5 g a day. Nobody reaches this by cooking; it takes deliberate consumption, usually of saffron bought as a remedy.

Side effects at supplement doses

Pooling the randomised trials, the effects reported more often with saffron than with placebo are: nausea, dry mouth, headache, drowsiness or sedation, dizziness, appetite change and, occasionally, anxiety or agitation. Rates are low, typically a few percent, and in most trials dropouts for side effects were no higher than on placebo. Some trials have reported more adverse effects with saffron than with a comparator antidepressant; others fewer.

If you take saffron as a supplement and notice any of these, the usual advice is to stop and see whether it resolves. None of them is dangerous.

Side effects at high doses

Above 1.5 g a day, case reports and animal studies describe vomiting, diarrhoea, dizziness, low blood pressure, bleeding from the nose, lips or eyelids, numbness, and yellowing of the skin, eyes and mucous membranes from the crocin pigment. Five grams or more taken at once has caused serious toxicity, and reviews cite around 12 to 20 g as a potentially lethal dose.

The yellowing deserves a note because it alarms people. Crocin is a strong yellow dye, and at very high intakes it colours the skin and the whites of the eyes. It is not jaundice and reverses when saffron is stopped, but if you have taken enough saffron to turn yellow you have taken far too much.

Who should be careful

Pregnancy. Culinary amounts are regarded as safe and saffron milk is a traditional pregnancy drink across South Asia. High doses are a different matter: saffron has been used traditionally to stimulate the uterus and reviews advise against more than about 5 g, with most clinicians suggesting pregnant women stay at culinary levels and skip supplements altogether. The widespread belief that it gives the baby a fair complexion is a myth. Is saffron safe in pregnancy? covers this in detail.

Breastfeeding. There is little data. Culinary amounts are fine; supplement doses are unstudied.

Bipolar disorder. Case reports describe mania or hypomania after saffron supplements in people with bipolar disorder, consistent with saffron’s mood-elevating effect. Supplement doses should be avoided or taken only under psychiatric supervision.

Antidepressants. Saffron appears to act partly on serotonin. Adding a supplement dose to an SSRI or SNRI could in principle add to serotonergic effects. There are no well-documented cases of serotonin syndrome from saffron, but caution is sensible: discuss it with the prescriber rather than self-combining.

Blood thinners and surgery. Saffron has mild antiplatelet activity. With warfarin, aspirin or clopidogrel it may increase bleeding tendency at supplement doses. Stop saffron supplements two weeks before planned surgery.

Blood pressure medication. Saffron can lower blood pressure slightly. Combined with antihypertensives it may add to the effect; monitor for dizziness.

Allergy. Saffron allergy is rare but documented, especially in people who handle it occupationally and in those allergic to related plants or to Lolium, Olea and Salsola pollens. Symptoms range from skin reactions to, very rarely, anaphylaxis. If you react to saffron on the skin, do not eat it.

Children. Culinary amounts are fine from toddlerhood. Supplement doses have been studied in adolescents in one trial but there is little data for younger children; do not give children saffron as a remedy.

The real risk: fake saffron

Everything above concerns genuine saffron. The more common safety problem is saffron that is not saffron. Surveys of retail saffron, especially powder and cheap packets, regularly find synthetic dyes such as tartrazine, sunset yellow and occasionally industrial colourants that are not approved for food; dyed safflower, corn silk or coconut fibre; and in some cases heavy-metal contamination from dyes or from being bulked with mineral powder.

None of this is a saffron side effect. It is a fraud side effect, and the defence is the same as always: buy whole threads from a seller who publishes a per-lot lab report including a dye screen, and run the water test at home. Real saffron bleeds a slow yellow over 15 minutes while the threads stay red; dyed fakes stain the water in seconds. How to spot fake saffron has the full set of checks, and our quality and testing page explains what the lab report covers. Every lot we sell is screened for artificial colourants, and the result is printed on the report.

Sensible rules

• In cooking, use what the recipe needs. There is no reason to count.
• If you take saffron for mood, sleep or PMS, stay at the studied 28 to 30 mg a day and give it four to six weeks.
• Never exceed 1.5 g a day in total, and treat 5 g as an emergency.
• Pregnant, bipolar, on antidepressants or blood thinners: culinary amounts only unless your doctor agrees otherwise.
• Buy threads with a lab report. The dye in fake saffron is the most likely thing to harm you.

Read next: Saffron dosage per day and Is saffron safe in pregnancy, for children and with medication?.

Questions people ask

What are the side effects of saffron? +

At cooking amounts, a few threads per dish, saffron has no known side effects in healthy adults. At supplement doses of 30 mg a day, trials report mostly mild effects at placebo-like rates: nausea, dry mouth, headache, drowsiness or a change in appetite. Above about 1.5 g a day, which is 50 times a supplement dose, saffron can cause vomiting, dizziness, low blood pressure, yellowing of the skin and eyes, and bleeding. Five grams or more at once is toxic.

How much saffron is too much? +

Stay under 1.5 g a day in total, which is roughly 600 threads, and nobody reaches that by cooking. Doses of 5 g and above have caused serious poisoning, and around 12 to 20 g is reported as potentially fatal. Clinical trials use 28 to 30 mg a day, so the gap between an effective dose and a harmful one is wide.

Who should not take saffron? +

Pregnant women should keep to culinary amounts and avoid saffron supplements, because high doses can stimulate the uterus. People with bipolar disorder should avoid supplement doses, as saffron may trigger mania. Anyone on antidepressants, blood thinners or blood pressure medication, and anyone with a Crocus or Lolium allergy, should talk to a doctor first. Stop saffron two weeks before surgery.

Does saffron interact with medications? +

The interactions that matter are additive. Saffron has mild serotonergic effects, so combining supplement doses with SSRIs or other antidepressants may add to their effects. It has mild antiplatelet activity, so it may increase bleeding risk with warfarin, aspirin or clopidogrel. It can lower blood pressure slightly, so it may add to antihypertensives. Culinary amounts are not a concern.

Is Kashmiri saffron safer than other saffron? +

The origin does not change the safety of genuine saffron; all Crocus sativus stigma contains the same compounds. What changes risk is adulteration. Fake saffron coloured with synthetic dyes or mixed with unknown plant material is the real safety problem, and it is more likely in cheap, powdered or unlabelled saffron. Buy whole threads with a lab report.