Colorado Biolabs, Inc., the manufacturer of Proferrin ES and Proferrin Forte, was founded in 1997 with a plan to develop and market Proferrin an oral iron supplement made from heme iron polypeptide (HIP). Their proprietary process results in an oral iron product that supports healthy iron levels by providing an optimal amount of HIP in a single tablet. is proud to carry the entire range of this fine brand.