Hi. There are a lot of people that start it and quit, thinking it is the wrong plan for them. This is because, in truth, the first week can be very difficult as your body adjusts to almost no carbs, when most of us have become used to comsuming tons of carbs. I almost quit that first week. I was weak, shaky, and lethargic. Now, I feel just fine and I don't get that typical "middle of the afternoon lazy feeling." The bad breath thing is a reality. It's called "ketone breath" and occurs because you are releasing ketones through your breath and your urine. It's not the same type of bad breath as you would have from poor oral hygeine or from eating garlic. Drinking lots of water and using sugar free mints will help with this. I really like the fact that I don't feel bloated anymore and tired all the time. But yes, that first week is a huge drag.