I'm curious about the lifespan of Changa, is it similar to just pure DMT? Should I worry about oxidization like with DMT?

I vaccuum seal my Changa normally, and I was considering making a large batch of Changa but was wondering if it would be a waste for long term storage. Like really long term storage, say over a year?

If this means anything..one of my blends has sat around for close to 2 years. It's still as potent as the first day I made it. And it's just in a little plastic zip baggie.