Related Experiment Video
Updated: May 11, 2026

05:35
A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
Published on: January 19, 2024
HbA1c and iron deficiency: a review
1Centre for Diabetes and Endocrinology, Faculty of Medicine, JN Medical College, Aligarh Muslim University, Aligarh 202002, India. jamalahmad11@rediffmail.com
Diabetes & Metabolic Syndrome
|May 18, 2013
Summary
Iron deficiency anemia may increase Hemoglobin A1c (HbA1c) levels, contrary to other anemias. Further research is needed to understand the exact mechanism of this upward shift in HbA1c.
Area of Science:
- Clinical Biochemistry
- Hematology
Background:
- Erythrocyte turnover significantly impacts Hemoglobin A1c (HbA1c) levels.
- Clinicians are advised to consider factors affecting red blood cell turnover.
- While most anemias lower HbA1c, iron deficiency anemia is an exception, potentially increasing it.
Purpose of the Study:
- To investigate the unclear mechanism by which iron deficiency anemia influences HbA1c concentrations.
- To explore the factors contributing to increased HbA1c glycation in iron deficiency.
Main Methods:
- This study is based on existing literature and expert consensus.
- Further large-scale studies are proposed to elucidate the HbA1c enhancing effect.
Main Results:
- Iron deficiency anemia has been observed to cause a slight upward shift in HbA1c levels.
- The precise biochemical pathways remain speculative and require further investigation.
Conclusions:
- The relationship between iron deficiency anemia and elevated HbA1c requires more extensive research.
- Understanding the mechanism of increased HbA1c glycation in iron deficiency is crucial for accurate diabetes management.
Related Concept Videos
Disorders of Erythrocytes
Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
Hemoglobin
Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
The Periodic Table and Organismal Elements
OverviewElements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally-occurring, and fewer still are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.The Periodic Table Provides Information...
Jaundice
Jaundice, or icterus, is the yellow discoloration of the skin, sclerae, and mucous membranes. It happens when plasma bilirubin levels rise above 2.5-3 mg/dL, leading to bilirubin deposition in tissue.Bilirubin is a byproduct of hemoglobin degradation. In macrophages, hemoglobin breaks down into globin and heme. Globin is converted into amino acids, while heme is turned into biliverdin by heme oxygenase, which is then reduced to unconjugated bilirubin by biliverdin reductase.Unconjugated...
Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
Hyperglycemia
Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose levels exceed 180 mg/dL two...

