I've been surprised that Walmart's house brand of groceries is often less of a "science experiment" than similar major name brand items. Which given their (deserved) reputation for being cut-throat on forcing suppliers to cut costs surprised me when I started noticing it. They'd advertise "no corn syrup", they'd use olive oil instead of seed oils for certain things, etc...

This isn't universal by any stretch, and you should be skeptical; but at least where I am Walmart has gotten leaps and bounds better for groceries than it was a few years ago..