Great question. I can't say for sure. I can try to back-of-the-envelope it, though. Normal glucose is below 100mg/dL, and you have 5L of blood. This means you o

Great question. I can't say for sure. I can try to back-of-the-envelope it, though. Normal glucose is below 100mg/dL, and you have 5L of blood. This means you only have ~5g of glucose in your blood at any given time, so a very small amount of glucose absorbed as a bolus could conceivably have a strong effect. This is/should be fairly tightly regulated by insulin, so I can't say for sure that this isn't simply a lab error, but it does seem plausible.