UAMS Medical Laboratory Technician–Medical Laboratory Scientist (MLT-MLS) Practice Exam

Normal glucose range in whole blood is a bit lower than plasma because the sample includes cells, and glucose distribution between plasma and cells lowers the measured concentration in the whole-blood specimen. For fasting whole blood, a commonly used reference range is about 65 to 95 mg/dL, which is why this option is the best fit.

Remember that plasma glucose values tend to be higher by roughly 10–15% due to the absence of cells, so plasma ranges (often cited as around 70–110 mg/dL or similar) don’t match whole blood as closely. Non-fasting or postprandial values would be higher than the fasting range, but the question is specifically about the whole-blood fasting reference range.