For personal reasons, I have stopped taking medication and am relying on diet and exercise. I hadn't tested my blood for ages and after two days fasting, I thought I maybe should test. To my astonishment it was up at 16. I went anoher two days without food and when I tested it again, it had risen to 16.5. How is that possible? To go four days without food and have a reading like that seems very strange. Surely, with no food at all for so long, the sugar should have been very low indeed. I'd welcome any suggestions.