Thanks for bringing up this important point. Getting blood work done before & after is important when doing a diet change. Rob Rhinehart from soylent fame gets his blood drawn fairly regularly if I remember correctly. The community over on /r/keto is pretty good with helping out, see http://www.reddit.com/r/keto/comments/1j5yi8/help_me_rketo_h.... Due to genetics keto can be a bad idea for certain people.