Comfrey root is a nutritive and rejuvenating tonic for the lungs and the mucous membranes. Comfrey is a perennial herb of the Boraginaceae family. It is a powerful tonic and one of the best agents for promoting tissue growth externally and internally, and whole-body healing - especially if affected by traumatic injury. Medicinal properties include: respiratory and urinary tonic and for haemorrhoids. Actions include: nutritive tonic, demulcent, expectorant, astringent, haemostatic. Note: due to the presence of pyrrolizidine alkaloids, comfrey root is generally not recommended for internal use. Always seek advice from a qualified practitioner.