High levels of insulin are bad for lungs and for Indians who have the lowest lung function the focus should be on improving diet and lifestyle to tackle pre-diabetes and diabetes according to a study. In the study a team of experts from India Europe and the US has connected the dots between raised insulin levels and impaired lung structure and function. Raised insulin is a strong marker of future diabetes. Most people use insulin raising strategies to improve blood glucose in diabetes without considering what the side effects of higher insulin would be Anurag Agrawal principal scientist at CSIR