Application of saffron in the industry
Within the saffron industry, the spice is used mainly as a natural food colorant and flavoring, as a subject of ongoing health-related research, and as a traditional textile dye. The sections below cover these applications along with saffron’s chemical composition.
Saffron cultivation in Iran dates back thousands of years, well before the common era, and today it is grown across some of the country’s coldest regions — areas that nonetheless see hot, dry summers well suited to the crop. Saffron is also cultivated on a smaller scale in a handful of other countries, including Greece and Italy, but Iran dominates global production: the country accounts for more than 90% of the world’s saffron, with the majority grown in the Khorasan provinces of northeastern Iran.
Saffron (Crocus sativus L.) belongs to the Iridaceae family. It is a perennial, stemless plant standing 10–30 cm tall, growing from a spherical corm roughly 3–5 cm in diameter, with each corm typically producing one to four flowers. Each flower has six purple tepals (three outer, three inner) and three stamens. The plant’s true leaves — five to eleven per corm, narrow at 1.5–3 mm wide — appear at flowering or shortly after. The edible, commercial part of the plant is the red stigma of the flower; these threads are hand-picked and dried to produce the spice known as saffron.
Food Industry
According to the FDA, saffron is approved for use as a natural colorant, and there are no restrictions on its use as a natural flavoring. It appears across a wide range of food categories, including processed meats such as sausage, dairy products like margarine and cheese, baked goods, desserts, snacks, chocolate, beverages, soups, rice dishes, and poultry preparations.
Health-related research
Saffron has traditionally been associated with easier digestion, likely related to its bitter compounds. Preliminary research has examined compounds such as crocin, crocetin, and other carotenoids in saffron for possible antioxidant and lipid-related effects, and some small clinical studies have explored saffron’s effect on markers related to cognitive health (Ayati Z, et al., BMC Complementary Medicine and Therapies, 2020). This remains an active area of scientific study, not an established treatment — saffron is not a substitute for medical care, and conditions such as Alzheimer’s disease and Parkinson’s disease should be managed by a physician.
Saffron also has a long history of use in traditional folk remedies for ailments such as jaundice, hepatitis, spasms, and diabetes, and as a mild appetite or digestive stimulant. These traditional uses have not been confirmed by rigorous clinical evidence, and anyone with these conditions should consult a doctor rather than relying on saffron as a treatment.
Industrial and Textile Use
In industrial applications, saffron has traditionally been used as a natural dye for silk and yarn.
Chemical Composition of Saffron
Chemical analysis of the saffron plant shows the following main components:
- Carbohydrates: Sugars make up more than 20% of saffron’s weight, including glucose and other simple sugars along with various glycosides.
- Minerals: Includes potassium oxide (K₂O), sodium oxide (Na₂O), phosphorus compounds, and chlorides.
- Vitamins: Contains vitamin B1 (thiamine) and vitamin B2 (riboflavin).
- Fats: Includes plant sterols such as sitosterol and campesterol.
- Pigments: Contains fat-soluble carotenoids such as lycopene, α-carotene, and β-carotene, along with water-soluble carotenoids such as crocin and anthocyanin. Crocin is the main compound responsible for saffron’s yellow color, with the chemical formula C44H64O24, and it makes up roughly 9–15% of the stigma by weight at flowering.
- Picrocrocin: A colorless glycoside responsible for saffron’s bitter taste, with the formula C16H26O7 and a melting point of around 156°C; it makes up roughly 4% of fresh saffron.
- Volatile oils: Safranal is the primary compound responsible for saffron’s characteristic aroma, with the formula C10H16O.
