Hmmm, I never knew to wait 40 seconds!! If no change right away I was pitching them. Have to try again, now. LOL


Ok, look at this. This says "15 seconds." From NutritionAdvance.com

How Do Ketone Strips Work?

You can probably guess the finer details, but if you want to know how to use ketone strips, the process looks like this;

Take a urine sample in a clean container/jar of some sort

Hold the end of the strip in the urine for a few seconds

Shake the strip to remove any excess “liquid” before removing from the container

Wait 15 seconds until the ketone strip changes color

Comparing the color of your ketone strip to the color chart will let you know if you’re in ketosis (and how deeply).