Ahh I see, thanks for that.Sorry there are still question marks and confusion over your classification Emma
My understanding of cPep, is that it is a substance that is produced alongside naturally secreted insulin, but which was not included in any of the injectable / exogenous insulins. So while you may have been injecting insulin, that insulin won’t have had any cPep. Only the insulin your beta cells is still producing will have the cPeptide.
So it is used as a measure of your ‘home grown’ production.
Must be very frustrating for you that the result may have been affected by the lack of information about how to prepare. I wonder how much effect that might have and whether it is significant or only marginal?
I think not waiting 2 hours could have made quite a difference from what I have read. Never mind I suppose I will have to wait another year and poke another hole in my belt !