CKD was what I was referring to:

http://forum.lowcarber.org/showthread.php?t=16165

This kind of sounds like what you are doing milwalhan?

Thanks everybody for such insight. I too have finally passed the tiredness and I am feeling better.

The same thing happened to me. I felt so weak and tired all the time. Everyone was telling me how energetic they felt, but I was the total opposite. Forget about working out. I figured out it was because I was losing weight so fast that my body needed time to adjust to the changes. As soon as my weight stabilized, my strength came back and my mood was better.