When did you start counting carbs and exercising in POST-Operation Weight Loss Surgery Q&A Posted August 17, 2018 I just converted from sleeve to bypass. My body needs lower carb to lose weight. That's where I went wrong with the sleeve. So I have been counting carbs since the day I got out of the hospital and will hopefully keep counting lifelong. I need this second chance to work so for myself, I don't seem to be someone who can eat "normal" but just less. Maybe I am carb sensitive. So I aim for 20 g of carbs but will allow up to 35.