Nutrition facts about a single trace element
This page brings together what's known about iron and the EU claim behind it — with its origin, its distribution in the body, and the full wording inside the Cornerstones.
Open the CornerstonesSeveral organs share the tasks of the immune system: the cells involved arise in the bone marrow, some of them mature further in the thymus, and later they meet up in the spleen and in the lymph nodes. None of these organs works on its own.
Several minerals are linked to individual building blocks of this network, each in its own way, reviewed separately. Smithsonitano brings together what's specifically known about iron here — without mixing in the claims that apply to other minerals.
Iron itself belongs to the trace elements: the body needs only small amounts of it, but can't produce it on its own and has to take it in regularly through food. Part of that amount isn't used right away — it gets held in reserve at certain points in the body instead.
For iron, a scientifically reviewed claim tied to the immune system exists, cleared by the European Commission. It describes a documented, physiologically ordinary connection — not an increase beyond that.
“Iron contributes to the normal function of the immune system”
EU-authorized wording · Regulation (EU) No 432/2012
The authorized sentence names only the reviewed overall result, not the individual steps behind it. Two of those steps can be traced particularly well in the scientific literature, and both are introduced below.
Red blood cells have a limited lifespan of roughly 120 days. Once that time is up, specific cells in the spleen, liver, and bone marrow recognize and break them down. Iron sits inside these blood cells, and this breakdown releases it, ready to be captured again.
The spleen and the bone marrow are also among the places where immune cells arise or come together. This double role — a building site for immune cells and a spot for iron reprocessing at the same time — is one of the reasons researchers took an interest in a connection between iron and this network.
Free, unbound iron reacts readily with oxygen and can form reactive byproducts in the process. The body therefore prefers to keep iron in a bound form: enclosed inside a spherical storage protein called ferritin, built from several subunits, that can hold several thousand iron ions inside it.
Ferritin turns up in numerous cell types, including the cells of the spleen and the bone marrow involved in the breakdown described above. That's exactly the intersection where the claim quoted at the start comes in: “Iron contributes to the normal function of the immune system”, EU-authorized wording · Regulation (EU) No 432/2012.
Iron also has several other claims, each reviewed and authorized separately, that relate to different body functions. Those remain legally separate cases; Smithsonitano sticks strictly to the claim on the immune system quoted here.
$49.00
One-time access · Digital information product
After purchase, the second page is available in full: with intake tables, the deeper sections on storage and recycling, and the complete text of the EU regulation.
Anyone who doesn't find the content useful after buying it has two weeks to send a short note to our inbox — a 14-day money-back guarantee we offer voluntarily, and the payment comes back in full.
This page brings together generally available knowledge about iron and is meant as nutrition information, not as a remedy or a diagnostic tool. A supplement can't recreate a varied, well-rounded diet; the amount stated on a package should be read as an upper limit, not as a target. Products like this belong somewhere children can't reach.
Anyone with a medical condition, who is pregnant, nursing, or taking medication is best off discussing their own diet in person with a doctor or a registered dietitian before changing anything about it. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Questions about this page, about the Cornerstones, or about your data reach our inbox through the form below.
Either way, your message lands in the same inbox: through this form, or straight to [email protected].