Charles The faintness is your blood sugar dropping as a result of your body secreting too much insulin in response to the carbs. It is all too easy for the body to digest carbs and take vitually no energy. I recently heard that protein actually takes more energy to use than it is worth, bit I think this might have been referring to the energy required to digest the protein and build bodily tissues - presumably when there are no further tissues to be built this will no longer be the case (eg eating vast amounts of protein and nothing else will not work! but this may be another factor involved in the success of low carb). Caroline _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.