What Does IronSorb + Lactoferrin Do? IronSorb + Lactoferrin combines Iron-Protein Succinylate (IPS) with Lactoferrin. IPS is an iron complex that reduces irritation to the gastrointestinal (GI) tract in comparison to other forms of iron. Lactoferrin is an important immune-supporting glycoprotein. The biological activities of lactoferrin include its ability to bind iron, facilitate iron absorption and reduce iron-induced oxidation.