I have been using Ketostrips for 6 weeks. I keep notes off all the foods and liquid intake, as well as the Ketostrips results. My findings are; early morning after I get up they show positive. After I drink a couple of cups of coffee, they show trace or negative. If I don’t drink anything till evening, they again register trace or higher, but if I consume liquids through the day, the results are negative. My conclusion, the strip results fluctuate depending on our liquid intake.