Järn – blodets funktion, exakta former och mängder på etiketten

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Selected whole synthesis paragraphs; no linked trial originals assigned.

URL: https://ods.od.nih.gov/factsheets/Iron-HealthProfessional/
Title: Iron — Fact Sheet for Health Professionals
Publisher: NIH Office of Dietary Supplements
Source update date: 2025-09-04
Capture date: 2026-10-18
Capture: Official web-reader text. Whole selected paragraphs from Introduction, Assessing iron status, Dietary supplements, Iron Deficiency, Frequent blood donors and Health Risks from Excessive Iron. Displayed reference labels retained; reader link markers removed. Not a full-page capture, original clinical trial or full assigned bibliography. Publisher HTTP status not captured.

Introduction — first whole paragraph

Iron is a mineral that is naturally present in many foods, added to some food products, and available as a dietary supplement. Iron is an essential component of hemoglobin, an erythrocyte (red blood cell) protein that transfers oxygen from the lungs to the tissues [1]. As a component of myoglobin, another protein that provides oxygen, iron supports muscle metabolism and healthy connective tissue [2].

Introduction — whole paragraph on heme and nonheme

Dietary iron has two main forms: heme and nonheme [1]. Plants and iron-fortified foods contain nonheme iron only, whereas meat, seafood, and poultry contain both heme and nonheme iron [2]. Heme iron, which forms when iron combines with protoporphyrin IX, contributes about 10% to 15% of total iron intakes in western populations [3-5].

Assessing iron status — complete opening summary paragraph

Hemoglobin and hematocrit are the most commonly used measures to screen patients for iron deficiency, although they are neither sensitive nor specific. Serum ferritin concentration, which is a measure of the body’s iron stores, is also used, but it can be affected by inflammation. Often, health care providers will use multiple measurements to diagnose iron deficiency. They may also consider a patient’s dietary and supplemental iron intakes and how those compare to intake recommendations.

Dietary supplements — selected whole paragraph on elemental amounts

The different forms of iron in supplements contain varying amounts of elemental iron. For example, ferrous fumarate is 33% elemental iron by weight, whereas ferrous sulfate is 20% and ferrous gluconate is 12% elemental iron [27]. Fortunately, elemental iron is listed in the Supplement Facts panel, so consumers do not need to calculate the amount of iron supplied by various forms of iron supplements.

Iron Deficiency — selected whole paragraph on other causes of anemia

In 2002, the WHO characterized IDA as one of the 10 leading risk factors for disease around the world [42]. Although iron deficiency is the most common cause of anemia, deficiencies of other micronutrients (e.g., folate, vitamin B12) and other factors (e.g., chronic infection and inflammation) can cause different forms of anemia or contribute to their severity.

Frequent blood donors — complete detailed trial paragraph

A clinical trial of iron supplementation found that of 215 adults who had donated a unit of blood within the past 3 to 8 days, those randomized to take an iron supplement (37.5 mg/day elemental iron from ferrous gluconate) for 24 weeks recovered their lost hemoglobin and iron in less than half the time of those not given the supplement [52]. At 24 weeks, two-thirds of the donors who did not receive iron supplementation had not recovered the iron had they lost.

Health Risks from Excessive Iron — complete introductory summary paragraph

The risk of iron overload from dietary sources of iron is low among adults who have normal intestinal function, but high doses of iron supplements can cause a range of gastrointestinal effects. With extremely high doses, these effects can be severe, including corrosive necrosis of the intestine, multisystem organ failure, and even death. The Tolerable Upper Intake Level for iron is 45 mg for adults, and it ranges from 40 mg to 45 mg for infants, children, and adolescents, depending on age.

Health Risks from Excessive Iron — selected whole paragraph on accidental ingestion

Between 1983 and 2000, at least 43 U.S. children died from ingesting supplements containing high doses of iron (36–443 mg iron/kg body weight) [27]. Accidental ingestion of iron supplements caused about a third of poisoning deaths among children reported in the United States between 1983 and 1991.

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Full current exact imported definitions of distinct identities; not an identity merge

{"id":"chebi-18248","version_id":"bb93ac5e-7c5b-4e9e-a9ef-9eab35b24eb0","name":"iron atom","definition":"An iron group element atom that has atomic number 26."}

{"id":"chebi-29033","version_id":"f7a72cb0-eb6b-44d4-b565-854226c408a2","name":"iron(2+)","definition":""}

{"id":"chebi-29034","version_id":"d4858f6b-8158-4c50-9e37-8a5c2458a917","name":"iron(3+)","definition":""}

{"id":"chebi-749323","version_id":"5d8e246f-d5b0-439e-8de2-5213b7d9f171","name":"ferrous sulfate","definition":""}

{"id":"chebi-75832","version_id":"6758c767-3091-4d6e-a5d0-e41c7d1bf2d6","name":"iron(2+) sulfate (anhydrous)","definition":"A compound of iron and sulfate in which the ratio of iron(2+) to sulfate ions is 1:1. Various hydrates occur naturally - most commonly the heptahydrate, which loses water to form the tetrahydrate at 57°C and the monohydrate at 65°C."}

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Supplement Facts
Serving Size: 1 Capsule
Servings Per Container: 30
	Amount Per Serving	% Daily Value
Vitamin C (Liposomal Vitamin C)	18 mg	20%
Iron (Liposomal Ferrous Fumerate)	18 mg	100%

Cellulose, vegetable cellulose capsule, lipid blend from sunflower oil and sustainable palm oil, magnesium stearate, silica.

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Supplement Facts
Serving Size: 1 Tablet
	Amount Per Serving	%Daily Value
Iron (as iron amino acid chelate)	25 mg	139%

Sorbitol, hydroxypropyl cellulose, stearic acid, modified cellulose gum, silica, and magnesium stearate. 
Contains soy. 
Contains no yeast, dairy, egg, gluten or wheat. Contains no preservatives, artificial color, flavor or fragrance.

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Läs produktdeklarationen på ActiQs

Supplement Facts
Serving Size: 1 Capsule
Servings Per Container: 240
	Amount Per Serving	%DV*
Iron (from Ferrochel® ferrous
bisglycinate chelate)	18 mg	100%
*Percent Daily Value (DV) is based on a 2,000 calorie diet.

Rice flour, hypromellose (cellulose) capsule, citric acid, magnesium stearate (vegetable source), maltodextrin, silica. 
Made and quality tested in the USA with globally sourced ingredients.