When your body transitions from carb burning state to fat burning state, you can experience a lot of nasty side effects. (bodyketosis.com)
However, if you in the slightest understand the human suffering 90 % of the human population would see then you are exhibiting a very nasty side of the human condition. (religion.blogs.cnn.com)
Not only is it a cheaper choice, it doesn't come with nasty side effects a swell. (dietselfhelp.com)