What is the expected reference range for albumin levels?

The reference range for albumin levels is 3.5 to 5.0 g/dL, making this the correct choice. Albumin is a crucial protein produced by the liver, and it plays an essential role in maintaining oncotic pressure and transporting various substances in the blood, including hormones, vitamins, and drugs.

Maintaining albumin levels within this range is vital for proper physiological function. Low levels of albumin can indicate liver disease, kidney disease, or malnutrition, while high levels might suggest dehydration or other medical conditions. Therefore, understanding the normal range helps in assessing a patient's overall health and in diagnosing potential medical issues.

Different ranges indicated in the other choices do not align with clinical guidelines and common laboratory standards for albumin in healthy adults. Recognizing the correct range helps healthcare professionals in monitoring and managing a patient's nutritional status and overall health.