Although the idea of popping these while watching a movie sounds good, but here comes the flip side. You will be consuming genetically modified corn kernels, processed salt and lots of preservatives, which are added to enhance its flavours. The high levels of sodium and the chemical diacetyl, found in the microwave popcorn are not good for your health. And, we are not even talking about the more harmful buttered and flavoured popcorns, yet!