Want to know if you're maintaining ketosis on your low carb diet? It's surprisingly easy to fail, with the most simple food items knocking some people off their planned system. Try the Bayer?s Ketostix Reagent Strips for Urinalysis. These strips make it easy to test throughout the day and week how one's ketosis is doing, and thus one quickly learns what food items work, what doesn't, and what kind of 'fun' can be incorporated into the diet. Helps to check if your body is in ketosis or not. Strips change to pink if your body is in ketosis. An easy way to track your keto diet. Can be tested during the day or week. Informs you of your progress with ketosis. ". Product Benefits.