Popcorn has around 7 carbs per popped cup. Depending on which diet you are following, during induction this is a no no.

In layman's terms the way this high protein, low carb diet works without hardening your arteries is this:

You restrict your carb intake, forcing your body to convert into a fat burning metabolism instead of sugar burning. The fat you consume in your diet, gets converted to fuel BEFORE it hits your blood stream, to be stored else where.

That is it's simplest explanation. I HIGHLY recommend you read CAD, Dr Atkins or Protein Power and chose a plan to stick with.

Welcome and good luck!