As I've documented already, I'm on a ketogenic (Keto) diet. This means I'm on a very low carb, moderate protein, and high fat diet. There's a lot about this diet that I want to talk about and why I feel it's the best way to lose fat quickly, but I think it takes a basic understanding of human biology and why what we put in our bodies is more important than just calories in/calories out.
Suffice to say, I have done a 180 from when I was losing weight a couple years ago. I still believe that you have to eat at a caloric deficit to lose weight, but the types of calories and where those calories come from can make a very big difference in how quickly you lose the weight and how you feel while doing it.
Before I get ahead of myself, I want to share this clip from the 2007 documentary "Fat Head". It's an awesome doc that I recommend taking the time from beginning to end to watch, but I believe that this clip is the most important clip from the movie and does the best job I've ever seen of explaining what carbohydrates do to our bodies and how eating too many of them can make us fat and, in some cases, develop Type II Diabetes.