Hemoglobin

ProteinBest taken away from food

What is it

Hemoglobin in supplements refers to edible hemoglobin extracted from animal blood (most often beef or pork) and used as a concentrated source of heme iron protein. It is also called "edible hemoglobin" or bovine hemoglobin concentrate.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Iron deficiency anemia

Strong Evidence

Heme iron, including from hemoglobin concentrate, is well absorbed and effective for raising iron status. Several clinical and population studies support fortification use.

How it works

Hemoglobin contains iron in its heme form, which is absorbed via the HCP1 receptor in the intestine. Heme iron has notably higher bioavailability than non-heme iron salts (such as ferrous sulfate), with absorption less affected by inhibitors like phytate or polyphenols. Hemoglobin also contributes high-quality animal protein. Iron from heme sources has been used in fortification programs to address iron deficiency anemia in populations where non-heme iron is poorly absorbed.

Dosage

DSLD does not list a single standardized dose. Iron supplements supply 18-65 mg of elemental iron per day; heme iron from hemoglobin products typically provides 5-15 mg per serving. The RDA for iron is 8 mg/day for men, 18 mg/day for women, with a UL of 45 mg.

When and how to take it

Iron is generally better absorbed on an empty stomach but may be better tolerated with a small meal. Take vitamin C-containing foods alongside non-heme sources to improve absorption; heme iron is less dependent on this.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Bovine hemoglobin concentrate

Used in some iron supplements and fortified products.

High heme iron bioavailability

Safety

Heme iron is well absorbed but excess iron, regardless of form, can cause GI upset, constipation, and over time iron overload. Iron supplements are a leading cause of pediatric poisoning; keep out of reach of children. Animal blood-derived products may not meet kosher, halal, or vegetarian standards.

Who should be cautious

Avoid in hemochromatosis, sickle cell disease, or any condition of iron overload. Pregnant people should follow their clinician's iron guidance. People with religious dietary restrictions should check sourcing.

Interactions

Iron interferes with absorption of thyroxine, tetracyclines, fluoroquinolones, and bisphosphonates. Calcium can reduce iron absorption. Separate iron supplements from these by several hours.

Food sources

Beef and other red meat

Amount
3 oz beef ~2 mg heme iron
%DV
11%

Frequently asked questions

Is heme iron better than ferrous sulfate?⌄

Heme iron is better absorbed and usually causes less GI upset, but ferrous sulfate is cheaper and still effective.

Is bovine hemoglobin safe?⌄

Modern processing standards make it safe at recommended doses, but it is not appropriate for vegetarian, vegan, kosher, or halal diets.

References

Hemoglobin on Wikidata — Wikidata link

Hemoglobin (ChEBI:35143) — ChEBI link

Hemoglobin on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Hemoglobin (PubMed search) — PubMed link

Track Hemoglobin with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.