Yes, it is possible. But don't rely alone on fasting levels to determine prediabetes or diabetes. If your levels are above normal it is used as an indicator, a pointer towards an A1c test.
Can you buy an A1c test at the drugstore? I feel funny asking my Dr to run the test because according to her, I don't have diabetes. She never even mentioned pre-diabetes. I don't want her think I'm being neurotic!
Good question! Made me go surfing the net as I have never paid attention to OTC A1c kits. First stop was the NGSP [National Glycohemoglobin Standardization Program]. These are the folks who write the standards for A1c testing; hospitals & independent labs & mfg'ers of home kits and lab equipment. I noticed the Bayer Metrika A1cNOW met their stringent standards. For a list of labs and kits and what HbA they can test go here. On the left click on HbA1c Test Methods... http://www.ngsp.org/prog/index.html
I found other meters with unknown reliability and quality at lower prices. But, I tend to shy away from health equipment that are not tested to see if they meet standards.
Amazon has the Bayer A1cNOW http://tinyurl.com/a1ctester
Also found at Wal-Mart and Walgreens.
This site has 39 reviews on the Bayer A1cNOW both positive AND negative. http://tinyurl.com/bayerreviews
Thank you so much for all of your helpful info. I can't tell you how much I appreciate it. You are very generous spending so much of your time helping all of us with our questions. I just wanted to publicly say "Thank you"!