Someone else on here once said it smells like acetone (finger nail polish remover) and peach like combo smell.
I agree, that's about what I smell...
It's so strong smelling to me now that they can leave an store isle and the scent stays in the air.

~also... I think it's when they have Keto Acidosis? Very ill but out and about. One lady at the grocery store was buying all kinds of fruit and I just wanted to tell her. She was in the Medium range of smell.
The cashier at Walgreens was the worst I've ever smelled. It filled the store. She is gone now. Hospital or dead, IDK? sad..

http://www.diabetes.org/living-with...idosis-dka.html

This one explains it better:
http://www.webmd.com/diabetes/tc/di...opic-overview#1