I forget where I read this, but purely by memory I recall any granulated sugar, not specifically noted as being "cane sugar", such as Walmart's store brand sugar, is made from beets, which is cheaper to produce because it is beets and not cane sugar. So, I've blindly followed this, and have looked specifically for "cane sugar" on packaging, thinking it to be better.
I realize to those more in the know this may simply be stupid, and at the least ignorant, reasoning, but sometimes time and opportunity allow for just winging it on some things, and gleaning what you can when you can.
Such as things like this:
@cedric said:
Polyphenols from sugar cane support Bifidobacteria.