Hemoglobin
HB
Description
"Hemoglobin" test measures the concentration of this oxygen-carrying protein in your red blood cells. It’s often used to investigate fatigue, weakness, or symptoms of anemia. Low levels may indicate blood loss, nutritional deficiencies, or chronic illness, while high results can be linked to dehydration or lung conditions. The test offers a quick snapshot of your blood’s ability to carry oxygen. It supports diagnosis, guides iron or vitamin therapy, and helps manage long-term oxygen-related concerns.
Test Category
Blood Cells, Proteins
Procedure
Invasive
Sample Type
Blood – Whole Blood
Units
Grams Per Deciliter | Grams Per Liter
Procedure Category
Blood Draw
Test Group
Hematology Group, Female Health Group, Male Health Group, Hydration Level Group, Gastrointestinal System Group, Blood Count Basic Group
Test Group Description
Blood Count Basic Group: This group includes essential tests for evaluating blood cell counts, providing foundational information for assessing overall blood health, and detecting potential abnormalities. Female Health Group: A comprehensive array of tests provides insights into various aspects of female health and wellness, aiding in the evaluation and management of overall health for females. Gastrointestinal Health Group: This group assesses different facets of gastrointestinal function and health, providing insights into digestive well-being and related conditions. Hydration Level Group: By evaluating hydration status and fluid balance, it offers insights into overall hydration levels and related health considerations. Male Health Group: A comprehensive array of tests provides insights into various aspects of male health and wellness, aiding in the evaluation and management of overall health for men. Hematology Group: Tests within this group focus on evaluating various aspects of blood health and function. These assessments provide insights into red blood cells, white blood cells, platelets, and other components of the blood.
Optimal Range
For Men:
Conventional Unit: 14.5–16.0 g/dL
SI Unit: 145–160 g/L
For Women:
Conventional Unit: 13.5–15.0 g/dL
SI Unit: 135–150 g/L
Normal Range
For Men:
Conventional Unit: 13.0–17.7 g/dL
SI Unit: 130–177 g/L
For Women:
Conventional Unit: 11.0–15.0 g/dL
SI Unit: 110–150 g/L
Results That Differ From The Norm (Direct and Indirect Causes)
Increased levels may indicate:
Burns
Congenital heart disease (Heart defects leading to chronic hypoxia)
Dehydration
Emphysema (Lung condition affecting oxygen exchange)
High altitudes (Hypoxia-induced erythropoiesis at elevated elevations)
Kidney cancer
Liver cancer
- ...
Key Reasons For Testing
Anemia Diagnosis: Identifies anemia by measuring hemoglobin levels, indicating reduced oxygen-carrying capacity.
Blood Oxygenation: Evaluates the blood's ability to deliver oxygen to tissues and organs.
Monitoring Blood Disorders: Tracks hemoglobin levels in anemia, polycythemia vera, or thalassemia.
Preoperative Screening: Assesses hemoglobin and overall health before surgery.
Nutritional Status: Reflects iron and nutritional adequacy, guiding interventions for deficiencies.
Detection of Blood Loss: Identifies acute or chronic blood loss due to trauma or bleeding.
Health Status Conditions It May Be Used To Assess
Currently, this test is not directly associated with any conditions listed on the Health Status page. However, it may be included as part of a broader set of tests linked to specific health conditions.
Some Prominent Medical Labs That May Offer This Test
Please note that this particular test has not been associated with any of the listed prominent medical labs. We recommend enquiring with your private physician or nearest hospital to determine where this specific test can be performed.
References
Important Note
Any medical procedure yielding results outside the norm may be directly or indirectly linked to the conditions outlined on this page. Various factors, including genetics, medication and supplement usage, recent illnesses, pregnancy, pre-test eating, smoking, and stress, can impact the test's outcome. Additionally, factors like false positives, false negatives, inaccurate analyses, and others can influence results.
Reference ranges, which help healthcare professionals interpret medical tests, may vary depending on age, gender, and other factors. They may also differ between laboratories due to variations in instruments and methods used. Optimal ranges are designed for preventive purposes, aiming to identify trends and potential risks early, while normal ranges reflect conventional laboratory values indicating no current disease or pathology. Your healthcare practitioner may have specific reasons for testing that deviate from the usual or may interpret results differently based on individual circumstances. Proper interpretation typically involves considering clinical findings and other diagnostic tests. Hence, it is crucial to provide your healthcare professionals with a comprehensive medical history, consult with them for result interpretation, and follow their guidance for potential re-testing or additional diagnostics.
Disclaimer
This content is provided solely for informative and educational purposes. It is not intended as a substitute for medical advice or treatment from a personal physician. Regarding the interpretation of their medical test results and/or specific health questions, it is recommended that all readers and viewers consult their physicians or other qualified health professionals. The publisher is not responsible for any adverse health effects that may result from reading or following the information in this educational content. Before beginning any nutrition, supplement, or lifestyle program, all viewers, especially those taking prescription or over-the-counter medications, should consult their physician or health care practitioner.
Please note that while prominent lab names are included in this content, we cannot guarantee that these labs offer all the tests mentioned. For confirmation, individuals should contact the labs directly or consult their medical practitioners. The information provided reflects general knowledge at the time of publication and may not include recent updates or emerging research. Readers should verify details with qualified professionals to ensure the most up-to-date and accurate guidance.
[1] Yilmaz B, Li H. Gut Microbiota and Iron: The Crucial Actors in Health and Disease. Pharmaceuticals (Basel).2018;11(4):98.
[2] Chernecky CC, Berger BJ. Hemoglobin (HB, Hgb). In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. Philadelphia, PA: Elsevier; 2013:621-623.
[3] Marcdante KJ, Kliegman RM. Hematology assessment. In: Marcdante KJ, Kliegman RM, eds. Nelson Essentials of Pediatrics. 8th ed. Elsevier; 2019:149.
[4] Means RT. Approach to the anemias. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:149.
[5] Bain BJ. Blood Cells: A Practical Guide. 5th ed. Hoboken, NJ: Wiley-Blackwell; 2015.
[6] Hoffbrand AV, Moss PAH. Essential Haematology. 7th ed. Hoboken, NJ: Wiley-Blackwell; 2016.
[7] Kaushansky K, Lichtman MA, Prchal JT, et al. Williams Hematology. 9th ed. New York, NY: McGraw-Hill Education; 2016.
[8] Fairbanks VF, Tefferi A. Normal ranges and the clinical interpretation of the complete blood count. Clin Lab Med.1999;19(1):1-24.
[9] Henry JB, McPherson RA, Pincus MR. Chapter 31: Basic Examination of Blood and Bone Marrow. In: Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. Philadelphia, PA: Elsevier; 2017.
[10] Turgeon ML. Clinical Hematology: Theory and Procedures. 5th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2011.
[11] McMullin MF. The molecular basis of disorders of hemoglobin. Expert Rev Hematol. 2012;5(6):683-692.
[12] Camaschella C. Iron-deficiency anemia. N Engl J Med. 2015;372(19):1832-1843.
[13] Barcellini W, Fattizzo B. Clinical applications of hemoglobin measurement: from anemias to erythrocytosis. Hematology Am Soc Hematol Educ Program. 2016;2016(1):358-365.
[14] Olsson KS, Ridefelt P, Lagerstedt M. Reference intervals for hemoglobin and the diagnosis of anemia in elderly men and women. Aging Clin Exp Res. 2021;33(2):303-310.