Was diagnosed what i thought was type 2 8 years ago....managed it really well with just diet and exercise for several years, couple of years ago started to get harder to manage despite eating barely any carbs, exercising for hours and being stick thin, started meds but they didn't do much. Decided to go and see an endocrinologist recently...I'm actually type 1!
They did 4 key tests on me
GAD - which was surprisingly negative (but they think that's because I've actually been type 1 for years!)
C-Peptide - very low for my blood sugar reading - type 1 marker!
Insulin Anti-bodies - off the scale - very strong Type 1 marker
And zinc transporter anti-body - again off the scale - another strong type 1 marker
So whatever has caused it, 3 of the 4 anti-body tests showing type 1....came right off the metformin (and coming off those made me appreciate they were doing nothing for me) and straight onto Lantus 6 units (long acting) and Novarapid (around 1 unit per 10gms of carbs)...I feel fantastic! It's not too arduous to be honest and actually far more black and white to manage than type 2...at least I now know and the future looks bright again...
Seems mis-diagnosis is becoming less rare and a myth that type 1 always manifests as a youngster. Call it LADA, type 1.5, whatever, my pancreas is barely working and I don't have the type 2 things I thoughts I had (no insulin resistance)..
Hypos are the issue for me with my job, so managing carbs and insulin and avoidance of big lows crucial to me....But i've never felt so good and realise that what glucose I did have in my system simply was't being used properly by the muscles due to no insulin (which explains the extreme tiredness I was getting!)...
My message to people is don't just take the docs assumption that it's type 2...if you're thin particularly, get tested for T1. My other message is, whilst it's early days, T1 isn't so bad....You know what you need to do, you can manage it...