Ace Your Phlebotomy Future with JLP Practice Exam 2026 – Draw Success from the Start!

Fasting specimens are used when a meal could skew the results, so the tests chosen are those most sensitive to recent food intake. Glucose testing relies on a baseline blood sugar level, which can rise after eating, so drawing after an overnight fast gives an accurate reading for diagnosing conditions like diabetes. Triglycerides are highly affected by recent fat intake; eating raises triglyceride levels due to chylomicrons in the blood, so a fasting sample provides a true baseline lipid level.

The other options involve measurements that are not significantly altered by a typical meal, so they are commonly drawn nonfasting. CBC and platelet counts assess blood cells, creatinine and BUN reflect kidney function and hydration, and electrolytes and albumin are not dependably fasting-specific.