Not too sure OP and the second poster is from, but from different labs I have used in the US, Sweden and India, all reported range between 0 to 1. Anything above 1 is high.
I am from England, and here they say 1 is the perfect average, but up to 5 is not much cause for concern.
Moderate pancolitis since May 2013.
Past treatments: Prednisolone, mesalazine, fish oil tablets.
Hospitalised due to severe reaction to mesalazine in September 2013.
Currently on 75mg Azathioprine.
Multi-vitamins, l-glutamine, coconut oil, hemp seed oil, tumeric and anti-histamines. Nothing is working yet.