What is the normal range for adult hemoglobin levels?

The normal range for adult hemoglobin levels is generally considered to be between 12.0 to 17.5 grams per deciliter. This range is essential for maintaining proper oxygen transport in the blood, which is critical for overall health and efficient functioning of organs and tissues. Hemoglobin levels can vary depending on a variety of factors including sex, age, and altitude, with adult females typically having lower hemoglobin levels compared to males, but the stated range encompasses both groups adequately.

Understanding that hemoglobin is the protein in red blood cells responsible for carrying oxygen also highlights the importance of these ranges. When hemoglobin levels fall below the normal range, it can indicate conditions such as anemia, while levels above can suggest dehydration or polycythemia, among other conditions.

The other ranges provided do not align with medically accepted values for adults, which reinforces the significance of selecting the correct normal range to assess and interpret hemoglobin levels effectively in clinical practice.