What is the normal distribution of hemoglobins in healthy adults?

In healthy adults, the typical distribution of hemoglobin types is characterized primarily by the presence of adult hemoglobin (Hb A). A normal adult will usually have around 95% of their hemoglobin as Hb A, which is the primary component that carries oxygen throughout the body.

Additionally, healthy adults have a smaller proportion of hemoglobin A2 (Hb A2), which usually comprises about 3.5% of total hemoglobin. Hb A2 plays a role in the transport of oxygen but is not as prevalent as Hb A. The presence of fetal hemoglobin (Hb F) is minimal in adults, typically ranging from about 1% to 2%. Hb F is the predominant hemoglobin in the fetus and decreases after birth as Hb A levels rise.

This distribution reflects the normal hemoglobin composition in the adult population, making the stated percentages in the correct answer accurate within the recognized physiological ranges.