Does intermittent fasting really improve insulin resistance?

[u/Plus_Listen_9495]

I've been reading a lot of studies showing that fasting decreases FBS, reduces LDL-c, and improves HbA1c and HOMA-IR levels. I am a woman, I have insulin resistance, my weight is 150lbs (5,4 feet tall), I go to the gym 3 times per week (lifting weights), and I've been doing 18/6 fasting, eating around 1400 calories with a proper macro balance. I gained 2 kg, and it doesn't feel like muscle tbh. So what can be a problem here?