Choose the Feosol Iron that's right for you. Each form of iron is absorbed differently by the body, depending on the individual, the form of iron and diet. Feosol Original is a high potency iron that is often recommended by doctors. Feosol Complete with Bifera contains two forms of iron which enhances iron absorption while minimizing side effects. Product: Feosol Original; Types of Iron: Ferrous sulfate iron; Benefit: High potency iron. Product: Feosol Complete with Bifera; Type of Iron: Heme iron polypeptide & polysaccharide iron complex; Benefit: Enhances iron absorption, minimizes side effects. Vespyr Brands: Committed to healthier life. An Iron Supplement for your Sensitive System. Feosol Complete with Bifera contains two forms of iron: heme (as HIP) and non-heme (as PIC). Heme iron is animal-based, like the iron you find in steak. Non-heme iron is often plant-derived, like the iron you find in spinach. Our patented combination of HIP and PIC is a unique, iron-rich supplement which enhances absorption while minimizing side effects such as constipation and nausea-delivering the best of both worlds. No food or vitamin C necessary. Take Feosol Complete with Bifera once daily, with or without food. Unlike other iron supplements, no Vitamin C is required for enhanced absorption. Feosol Complete with Bifera provides two types of iron in a single, small pill and the flexibility to take it any time of day. HIP is a natural form of iron derived from bovine sources. Bovine source, USDA certified.