I thought they were simply analyzing the antioxidants and polyphenols (and whatever else) from fecal matter, and from that coming to the conclusion that the more antioxidants you had in your fecal matter, the healthier they consider you to be.

Whether people who eat tons of antioxidants are actually healthier in the long term is a different matter.

I don't think it hurts most people, but I'm not convinced it's the be-all and end-all either.

And as WB pointed out, there's antioxidants in animal products too.

The assumption they're making is that you NEED and abundance of absolutely as many different types of antioxidants as possible though.