Exactly this!!! It is the insulin resistance that concerns me as well. I am 67 kgs, with another 2 to go which puts me in the middle of my healthy weight range.
I am not really bothered about my appearance ( although a beautiful bod would be nice)its the insulin that concerns me. I eat a low carb diet and am happy with that. I am not hungry but know I do not eat enough calories to maintain this weight. I am happy to increase the amount I eat (Christmas!!!)and dont want to be very skinny, which brings its own problems.
So what should I.do? Carry on and lose more weight to.see if insulin resistance improves? Or up the calories and maintain this healthy weight?
I suppose I can only try it and see what happens. A problem.is that some of my family already think I have developed an eating disorder. I keep leaving info about lchf diets about the place but they still.think its a fad, like the cabbage soup diet! I must admit I did try that once. It did not end well.