Similac Soy Isomil Infant Formula Powder with Iron, 30.8 ounce (1.93 lb/ 873 g) cannister.A 19 Cal/fl oz, nutritionally complete, soy-based infant formula for infants with feeding problems such as fussiness and gas; for infants whose parents choose a milk-free formula as a first feeding or as a supplement to breastfeeding; and for infants of vegetarian families. A lactose-free feeding for patients with disorders for which lactose should be avoided, including lactase deficiency, lactose intolerance, and galactosemia.