Coriander

Coriander, known as Dhanyaka in Sanskrit, is one of the rare herbs in Ayurveda that possesses all six tastes (Shadrasa), with sweet, astringent, bitter, and pungent being most prominent. The Bhavaprakasha Nighantu classifies it under the Haritakyadi Varga and praises it as Deepana (appetite-stimulating) despite its cooling nature, a paradox that reflects the sophisticated pharmacodynamics of Ayurvedic herbs. Its name Dhanyaka derives from 'Dhanya,' meaning blessed or auspicious, indicating the esteem in which it was held.

The Charaka Samhita places Dhanyaka among the Trishna Nigraha (thirst-alleviating) and Dahaprashamana (heat-relieving) groups. Its Sheeta (cold) virya and Madhura (sweet) vipaka make it the ideal cooling counterpart to heating spices like black pepper and ginger. In classical Pitta-pacifying formulations, coriander serves as the primary Shamana (palliative) agent, gently reducing excess heat while maintaining healthy digestive function.

According to the Ashtanga Hridaya, Dhanyaka is Mutrala (diuretic), Jwaraghna (fever-reducing), and Trishnahara (thirst-quenching). The classical preparation Dhanyakadi Hima (cold infusion of coriander) is widely prescribed for burning urination (Mutrakrichra), excessive thirst, and Pitta-type digestive complaints. This cold infusion method (Hima Kalpana) preserves the delicate cooling volatile oils that would be lost in a hot decoction.

Coriander plays a pivotal role in the celebrated CCF tea (Cumin-Coriander-Fennel), a tridoshic digestive blend recommended for daily use. In this combination, coriander provides the cooling, Pitta-pacifying balance that makes the formula suitable even for those with heat-related digestive issues. The Sharangadhara Samhita includes coriander in numerous compound formulations for Amlapitta (hyperacidity) and Raktapitta (bleeding disorders), leveraging its astringent and cooling properties.

Both the seeds and fresh leaves (cilantro) are used therapeutically. The fresh leaves are more cooling and are traditionally used in Pitta-pacifying diets, while the seeds have a broader therapeutic range including digestive, urinary, and respiratory applications. Roasting the seeds lightly before use makes them more digestive and slightly less cooling, a technique used to adapt the same ingredient to different constitutional needs.