What Is Proferrin? Uses, Dosage, and What You Need to Know in 2026

Proferrin is a specialty iron supplement that works differently from most iron products on pharmacy shelves. If your doctor has recommended it, or if you're considering it as an alternative to standard iron supplements that caused side effects, this guide covers everything you need to know — including what it is, what it's used for, how to take it, and who should avoid it.

What Is Proferrin?

Proferrin is a brand name for a heme iron polypeptide (HIP) supplement made by Colorado Biolabs, manufactured in Nebraska. It is derived from bovine (cow) hemoglobin through a proteolytic digestion process that isolates the heme molecule — the iron-containing component of hemoglobin — and renders it into a highly bioavailable, water-soluble powder.

Unlike non-heme iron supplements (such as ferrous sulfate), which deliver iron as a reactive ionic compound, Proferrin delivers iron as it occurs naturally in meat — bound within the heme structure. This form of iron is absorbed via a dedicated intestinal pathway, making it gentler on the digestive system and less affected by dietary inhibitors.

Proferrin is sold over-the-counter as a dietary supplement in the United States. It is the only heme iron polypeptide supplement in the U.S. with clinical trial data behind it, according to the manufacturer.

What Is Proferrin Used For?

Proferrin is used to treat or prevent iron deficiency and iron deficiency anemia in a variety of patient populations:

Iron deficiency anemia: The primary use — restoring iron stores and hemoglobin levels in patients with diagnosed iron deficiency.

Pregnancy-related iron deficiency: Blood volume increases by approximately 50% during pregnancy, dramatically increasing iron demand. Proferrin Forte (which includes folic acid) is particularly suited for pregnant patients who experience GI intolerance to standard prenatal iron.

Anemia of chronic disease: Including iron-deficiency component in chronic kidney disease, inflammatory bowel disease, and other chronic conditions.

GI-intolerant patients: Patients who cannot tolerate constipation, nausea, or stomach irritation from standard ferrous salts (ferrous sulfate, ferrous fumarate, ferrous gluconate).

Patients on PPIs or with achlorhydria: Proferrin's absorption is not pH-dependent, so it works even when stomach acid production is reduced.

Athletes: Vigorous training increases red blood cell turnover and iron demand. Athletes often find heme iron better tolerated during training cycles.

Proferrin Product Variants

Proferrin comes in three formulations:

Proferrin ES: 10.5 mg heme iron polypeptide per tablet with an easy-swallow green coating. The most widely available in retail stores.

Proferrin Forte: 12 mg heme iron polypeptide + 1 mg folic acid per capsule. Designed for patients who also need folate (e.g., pregnant women, patients with folate deficiency anemia).

Proferrin Clear: 10.5 mg heme iron polypeptide in an NSF-certified, dye-free gelatin capsule. For patients who prefer to avoid artificial colorings. Primarily available online.

Proferrin Dosage Instructions

The standard dosing recommendation for Proferrin ES is:

Standard maintenance dose: 1 tablet, 1–3 times daily

With food: Can be taken with or without food — heme iron absorption is not significantly affected by meals, coffee, tea, or calcium

With vitamin C: Not required — unlike non-heme iron, heme iron does not need vitamin C to enhance absorption

On PPIs: Proferrin can be taken with proton pump inhibitors without loss of efficacy — stomach acid is not required for heme iron absorption

Always follow your doctor's specific dosing instructions. The duration of supplementation depends on how severe the iron deficiency is and how well your iron stores respond.

Who Should NOT Take Proferrin?

Patients with hemochromatosis or iron overload disorders

Patients with a beef or meat allergy (Proferrin is derived from bovine hemoglobin)

Vegans and strict vegetarians who object to bovine-derived products

Individuals on certain medications (see drug interaction guide) without checking spacing requirements

How Do I Know If Proferrin Is Working?

With consistent daily use, most patients begin to see improvement in energy levels and other iron deficiency symptoms within 4–8 weeks. Blood markers (serum ferritin, hemoglobin, transferrin saturation) typically normalize after 2–4 months of supplementation in mild to moderate iron deficiency. Your doctor should order follow-up labs to confirm your iron stores are replenishing adequately.

To understand in detail how Proferrin's absorption pathway differs from standard iron supplements, see: How Does Proferrin Work? Mechanism of Action Explained.

Ready to start Proferrin? Use medfinder to find a pharmacy near you that has it in stock today.