What is the normal reference range for adult male hemoglobin (Hgb)?

What is the normal reference range for adult male hemoglobin (Hgb)?

• A. 13.8–17.2 g/dL
• B. 12.0–16.0 g/dL
• C. 14.0–18.0 g/dL
• D. 11.5–15.5 g/dL

Answer: (A)

Normal reference values for adult male hemoglobin are about 13.8 to 17.2 g/dL. Hemoglobin is the oxygen-carrying protein in red blood cells, and the value is measured in grams per deciliter. This range reflects what's typically seen in healthy adult men; values below can indicate anemia, while values above may point to polycythemia or factors like dehydration or chronic hypoxia. While lab values can vary a bit by method and population, 13.8–17.2 g/dL is the standard range used in most clinical settings and exams. The other ranges offered don’t align with the usual adult male reference—one is more typical for females, and the others sit outside the common upper or lower limits for men.

Normal reference values for adult male hemoglobin are about 13.8 to 17.2 g/dL. Hemoglobin is the oxygen-carrying protein in red blood cells, and the value is measured in grams per deciliter. This range reflects what's typically seen in healthy adult men; values below can indicate anemia, while values above may point to polycythemia or factors like dehydration or chronic hypoxia. While lab values can vary a bit by method and population, 13.8–17.2 g/dL is the standard range used in most clinical settings and exams. The other ranges offered don’t align with the usual adult male reference—one is more typical for females, and the others sit outside the common upper or lower limits for men.