How do you know if you are keto-adapted?

Loseintime

I am new to this ketogenic diet. I am trying it for the past 4 weeks. So far, I lost 10 pounds. I have being on ketosis since 3 weeks ago. I would like to know, how do you know if you are ketoadapted? And once you are, how do you know you got kicked out of it?
Thanks to all!

Leonidas_meets_Spartacus

Ketone blood strips showing BHB (beta-hydroxybutyrate) levels of more than 0.5mM. Ketone urine strips are not accurate.