Saffron

Saffron consists of the thread-like stigmas of Crocus sativus, a purple-flowered member of the iris family, which are hand-picked and dried; it takes a great many flowers to yield a small quantity of the spice, which is why it is so costly. Its deep color comes from crocin, a carotenoid pigment, its bitter taste from picrocrocin, and its distinctive aroma from safranal, and these constituents are also thought to underlie its biological effects ^[1]. As a plant product it contains a mixture of carotenoids and other compounds rather than a single active ingredient ^[1].

Saffron has been cultivated for thousands of years around the Mediterranean, the Middle East, and South Asia, and has served as a culinary spice, a dye, a perfume, and a traditional medicine. In cooking it colors and flavors dishes across many cuisines. As a remedy it appears in traditional systems of medicine, and modern interest has focused on standardized extracts sold as dietary supplements ^[1].

The most studied medicinal use of saffron is for depression and mood. Systematic reviews and meta-analyses of randomized trials have concluded that saffron, or standardized saffron extracts, can improve symptoms of mild to moderate depression compared with placebo, with some studies finding effects broadly comparable to conventional antidepressants ^[1][3][4]. Trials in healthy adults have likewise reported improvements in mood ^[2]. Saffron has additionally been explored for anxiety, premenstrual symptoms, and other conditions, although the evidence there is more preliminary and the trials overall tend to be small ^[4].

Saffron is sold both as the culinary spice, in threads or powder, and as concentrated, standardized extracts in capsule form marketed as dietary supplements. In most countries it is treated as a food and supplement rather than a licensed medicine. It is generally well tolerated at the amounts used in food and in trials, although very large quantities can be toxic ^[1].

Saffron is well tolerated at typical supplement doses, with occasional nausea, headache, dry mouth, or reduced appetite. High doses (several grams of the raw spice) can be toxic and are dangerous in pregnancy because they can stimulate the uterus. Because it may add to the effect of antidepressants, anyone on serotonergic medication should be cautious and loop in a doctor.

Saffron is the dried red stigma of the flower Crocus sativus, a male-sterile triploid crop that cannot reproduce without human cultivation, and its use as a spice, dye, and medicine stretches back millennia. It appears in Bronze Age Minoan frescoes on Crete from roughly 1600 to 1700 BCE, and genetic and archaeological evidence points to an origin around early Greece before it spread through Persia, Rome, Byzantium, the Arab world, and on to India and China.

Across these cultures saffron was applied medicinally for a wide range of ailments and was traditionally regarded as a mood-lifting tonic. Modern pharmacological research has focused on its bioactive constituents crocin, crocetin, and safranal, and a series of randomized clinical trials and meta-analyses since the 2000s have evaluated standardized saffron extracts for depressive symptoms. It is sold today as a culinary spice and as a dietary supplement rather than an approved pharmaceutical.