As new Soylent versions come out I tend to hope right on the latest version and have some bags / boxes of the older ones sitting there thinking I’ll finish them eventually … just noticed the expiration date on 1.3 is October 2015, if you still have some you might want to finish it soon or report back if you drink it after it expired whether it was fine or all green
The expiration date is rather conservative.
As are the expiration dates on most everything. (Only the expiration dates on baby food are regulated.) I’d be perfectly comfortable consuming the pouches half a year from now. Check the oil, though, that’ll go bad sooner.