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Does Riboflavin (Vitamin B2) Help Iron?
Riboflavin is needed to use iron, so check riboflavin sources such as dairy, eggs and fortified grains when iron is short.[1]
Based on Linus Pauling Institute — Riboflavin · Updated October 10, 2026
Riboflavin is needed to use iron[1]
Riboflavin is required for iron metabolism; animal research suggests a shortfall may impair iron absorption, increase its loss from the gut and impair its use in making haemoglobin.
Check riboflavin sources (dairy, eggs, fortified grains) when iron is short.
Source [1]Riboflavin. Micronutrient Information Center, Linus Pauling Institute, Oregon State University. (lpi.oregonstate.edu)
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- Do Iron and Manganese Compete?They are linked: iron deficiency raises manganese absorption and can make manganese toxicity worse.
- Does Vitamin A Help Iron?Vitamin A is needed to mobilise iron, so if iron and vitamin A are both short, address both.
- Do Coffee and Tea Block Iron Absorption?Coffee and tea can inhibit iron absorption: in a study in adults, coffee and tea drunk with a bread meal cut the iron absorbed from it.
- Do Whole Grains and Beans Block Iron?Phytate in grains and beans lowers non-heme iron absorption, but in a typical western diet the effect matters little for most people’s iron status.
- Does Soy Affect Iron Absorption?Soy protein lowers non-heme iron absorption, largely because of its phytate.
- Do Iron and Copper Work Together?Yes. Copper takes part in iron metabolism, and anemia is one effect of copper deficiency, which is uncommon.
Sources
- Riboflavin. Micronutrient Information Center, Linus Pauling Institute, Oregon State University. lpi.oregonstate.edu
This page is general information from the cited sources, not medical advice. If you take prescription medication, are pregnant, or manage a health condition, check supplement changes with a pharmacist or doctor.