What are the normal hemoglobin levels for men and women?

The normal hemoglobin levels vary by sex due to physiological differences. For men, a typical reference range is approximately 14 to 18 grams per deciliter (g/dL), while for women, the normal range is generally from 12 to 16 g/dL. These values represent the amount of hemoglobin, a protein in red blood cells responsible for carrying oxygen, and they can be influenced by various factors such as age, altitude, and overall health.

Maintaining appropriate hemoglobin levels is crucial for ensuring sufficient oxygen delivery to tissues and organs, which can be especially important in gerontological nutrition, where anemia can be a common issue among older adults. Understanding these ranges helps healthcare providers assess patients' nutritional status and manage any conditions that may influence hemoglobin levels.

The other options do not accurately reflect the accepted clinical ranges for hemoglobin levels in men and women, which is why they are not considered correct.