Can excessive carb intake cause insulin resistance / diabetes if not overweight but carry quite a bit of weight around stomach? not sure whether its fat or bloating as have pcos and constipation. can u hv chronic insulin resistance without diabetes?

Eating excessive carbohydrate is a known risk factor for diabetes mellitus (DM) because of pancreatic fatigue more than insulin resistance to start with. Tummy fat is completely different from abdominal bloating. For two persons with the same BMI, one has bigger waist size is at more risk for DM and cardiovascular disease. There is a saying "longer the waist line, shorter your life line".

You could have insulin resistance without diabetes, however diabetes mellitus is the end result of chronic insulin resistance and pancreatic exhaustion. Persistent excessive carbohydrate has to be stored and it is usually converted to fat that may be in hormonally active cells that contribute to insulin resistance. The fat cells around the abdomen is notorious for insulin resistance so take care.