However, i've been tracking my waistline measurement every other day after doing my morning business and fasted. I seem to have lost 2cm since starting 3 weeks ago.

I'm inclined to not take this 'loss' that seriously because the consensus is that IF takes about 3-4 weeks to really start showing results.

On the other hand, i know i'm metabolizing fat; family members have been complaining of my new acetone breath. (ketosis!)