one of my jiu jitsu buddies did the 0 carb diet for 2 weeks as a detox and he lost about 15-20lbs. he trained like twice a day and lived off of red meat, cheese and whipped cream (not together). he lost the weight and looked cut, but he slept a LOT and never had any energy. he said several times he felt like he was dying. what does everyone think? is the end result worth feeling like shit 24/7 for 2 weeks straight?