Yes, it could have done so. So does alcohol, dehydration, physical stress (including exercise), etc. That is why the 12-14 hrs. of fasting is so crucial to an accurate result. Nothing but water -- not even gum or vitamins, no smoking, no exercise.

Then there are those like my husband who go out and have a double cheeseburger with fries and a milkshake the night before his bloodwork and gets a stellar result.