I was wondering how long, on average, it takes to be in ketosis. I am 132 lbs and I have a high metabolism, I walk an average of atleast 1 hour and a half per day. Can someone tell me when you think I'll be in ketosis. I am starting tomorrow. I have given up coffee for the past few days to get ready and I am looking forward to being 110 lbs!! Can I drink green tea while I fast, it makes me feel better and more able to fast. Will having some green tea each day affect my wieght loss? Thanks Cally