Minor changes mostly, and this is going from memory. I just happened to check the most recent bottles of OC that I received recently against the label from some of my very first bottles of OC more than a year ago.
Cyanocobalamin has gone from 24mcg up to 800 mcg. Lycopene was dropped, as was lithium. Pyridoxine is now pyridoxamine. Vitamin K2 quantity also got chopped way down. Lastly, I think there were minor changes in the tocopherols.
I could me more exact if I had the labels in front of me, but maybe some of you could check to see if your labels tell you the same thing.
Thanks.
Chris