I have read a couple of posts that seem to suggest an OGTT has helped improve tolerance to carbs after being either on a very low calorie (eg Newcastle) diet or on very low carbs. I've done a 'sort of' Newcastle diet but with real food (and a few extra cals (1100-1200). Lost weight so BMI now at 22.5. I'm now on lowish carb diet (35-60g) which is fine and easy to sustain and I'm maintaining weight loss. It would be great to be able to tolerate a few more carbs sometimes. Hence I'm wondering whether its worth trying an OGTT. Any personal experiences of this ?