Don't sweat the strips - some people never show anything and lose just fine. They ARE in ketosis, the strips just aren't registering it.

If it shows trace - then you are in ketosis. Showing dark purple is just a sign of dehydration.

Generally speaking, the best time to test is in the morning. You will get more consistent and reliable results.

Finally, as even Dr. A points out, the strips are not a required part of the program and many people have never peed on a stick.

Keep the Faith!