For years as a fat person I have tried to cut fat out of my diet whenever I could. I have non stick pans and learnt to 'dry fry' vegetables so that I would not have to add fat. I would never add butter or cream to my foods. I believed what I was told that the reason I was fat was because I was eating too many calories and that if I cut down on my calories I would lose weight.
Guess what It did not work. Fifty years later I am fatter than when I started.
What no body told me was that our bodies need fat and oil in our diet. Certain fatty acids are essential and the body cannot make them. It is not so much about calories as about carbs and insulin that are the cause of the obesity problem.
Now I add a small amount of butter to my eggs. I fry my veg in a little olive oil. I am losing weight and feeling I have so much more energy.