Ketosis?

I know that ketosis start between third or the fourth day but how does it last?
And what happens if you eat angthing while at this stage?

Ketosis

hi your body is meant to stay in ketosis {fat burning stage} all the time the diet is being followed properly , but comes out very quickly if you eat anything that shouldnt be eaten. you can buy pots of ketone sticks that let you know when ketosis has been reached.