Dr Meyers Ferotal Extra Blood Tonic contains Copper Sulphate, Ferric Ammonium Citrate, Folic Acid, Vitamin B1, Vitamin B12, Vitamin B6 and Zinc Sulphate as active ingredients.De Meyers Ferotal Extra Blood Tonic works by producing blood cells and platelets in the body; metabolizing carbohydrate thus maintains normal growth; producing antibodies and hemoglobin by keeping blood sugar level in normal range; treating vitamin B12 deficiency; acting on megaloblastic bone marrow to produce a normoblastic marrow; inhibiting the herpes simplex virus growth; acting in the tricarboxylic acid cycle at the alpha-ketoglutarate level.