Comfrey Root (Symphytum officinale) has 18 amino acids (especially lysine) calcium, copper, iron, magnesium, phosphorus, potassium, protein, vitamins A, C and zinc. Has been used as a healing herb and encourages tissue repair. Supports healing by stimulating cell growth. Supports new cell growth and promotes rapid healing. When used externally to promote healing of sores, muscles and other tissues.