He seems to think that obesity is the cause of insulin resistance
Really? I think it is pretty well established it is the other way around. Additionaly, 40% of those with IR aren't overweight.
pancreatic and hepatic fat
Visceral fat is caused by excess carbs which are transformed into storage fat. Low carb diets are all about it
My sugars are also not at diabetic levels, though it seems headed that way if I don't figure out and fix the cause.
My husband's and my own blood results (sugar and Hb1Ac) have always been way below the diabetic threshold, but I have had high insulin, and the insulin of my husband is high (he gets severe depression without carbs)
individual, genetically determined liver and pancreatic fat threshold.
From what I have read there is an AGE threshold at which the insulin sensitivity declines. This age threshold is lowering from one generation to the next due to epigenetic transmission of IR from parents to children.
Vitamin B6 plays a huge role in insulin senstitivity, and apparently it gets diverged from its other functions (DAO enzyme, lymphocyte and RBC synthesis, oxalate metabolism/kidney stone prevention etc) to help with glucose absorption.
Strangely, the glycemic effects don't seem to carry on to the next day though.
Indeed, we need to eat enough broccoli and lettuce (+mixed leafy greens) to remain pain free (for the chromium, potassium, folate etc). However, a higher chromium source like mushrooms isn't tolerated due to high amines (again, B6 is diverted for glucose absorption)