The cause of obesity

if you want to be healthy, learn to eat differently. If you want to be fit, exercise more. Don't confuse healthy with fit and vice versa.
Carbs do 3 things: 1. they will give you energy that must be used immediately. If you don't use it immediately, then continue readying
2. They make you hungry sooner
3. They make you fat by storing the energy.

Learn to eat good fats (animal fats) and protein. You will eat less because you are full sooner (satiation factor) and you will transition to being "fat adapted" by using fat for energy. This is demonstrated to cure diabetes type 2 without meds.

If you're on twitter, please follow Dr. Tim Noakes and his foundation and see who he quotes a lot. There is much being researched on this topic and the world is changing rapidly.

Ok, here's the essential amino acids, there's essential fatty acids, but no essential carbohydrates. If you eliminate the carbs it relines your insulin. The first to carbs to be burned is glycogen and it's in your liver, that includes the water weight as well. Then the endocrine system will start to burn the adipose tissue or fat, the byproduct of that are ketones. You'll see that and diabetic patients in ketoacidosis.
Look up the krebs cycle.