Hey! I used the ketone strips at first, but I don't anymore. Go to YouTube and put your question in there. Dr Berg and Dr Berry are awesome. I hear tell of a Dr Fung is good to, but I have not checked him out yet.
If you keep your carbs low, generally under 25 net carbs you will be in ketosis after about 3 days. But ketosis doesn’t guarantee weight loss, you still have to have a calorie deficit to continually lose.