Wow, I totally get it now.
I've gone on and off primal/paleo eating for the past year, never sticking with it long enough to really start feeling the benefits; and never fully passing the effects of the dreaded low carb flu.
I've been able to stick with paleo eating (no dairy) for the last few weeks, and over the last few days I've been crossing into the threshold of primal mode, and oh my word, it's a life changer.
Motivation, energy, positivity, all sky rocketing. I even enjoy and have more patience with my kids. Sometimes I have so much energy, I'm not sure what to do with the surplus.
The cognitive foginess of the first few weeks has not only gone away, I have more clarity and focus.
This is coming from a guy is still 100 lbs overweight. I can't imagine how I'll feel when the weight comes off.