What is the reference range for normal serum glucose levels?

The reference range for normal serum glucose levels is widely accepted to be 70-100 mg/dL when measured in a fasting state. This range is crucial for the diagnosis and management of conditions like diabetes and hypoglycemia. It represents the blood glucose levels at which the body normally functions effectively without complications.

In a fasting state, maintaining serum glucose levels within this range indicates the body's efficient regulation of glucose homeostasis. Values below 70 mg/dL may indicate hypoglycemia, while values above 100 mg/dL can suggest insulin resistance or the early stages of diabetes, warranting further evaluation and monitoring.

Random serum glucose levels can vary widely based on food intake and time since the last meal, which is why establishing a specific reference range for random measurements is less straightforward than for fasting measurements. The other ranges provided in the options do not align with the established clinical guidelines. Therefore, identifying the correct range for fasting serum glucose is critical in clinical practice and patient management.