JEFRON Ferric maltol 30mg+vitamin D3 50mcg+Ascorbic acid 75mg+Folic acid 600mcg tablets Indications and usage Jefron is indicated for the treatment of iron deficiency in adults. Contraindications Jefron is contraindicated in patients with a history of: Iron-replacement therapy has an ironic problem Rather than making patients feel better, traditional oral irons,.